scan/base.go - Code Metrics - Inspection of "[WIP] WordPress Vulnerability Scan (core, plugin,..." - future-architect/vuls - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#769)

unknown

created 2019-02-01 10:08 UTC

scan/base.go F

↳ Parent: Project

Size/Duplication

Total Lines	758
Duplicated Lines	0 %

Importance

Changes

Metric	Value
cc	183
eloc	503
dl	0
loc	758
rs	2
c	0
b	0
f	0

36 Methods

Rating	Name	Size	Complexity
A	scan.*base.lxdPs	7	2
A	scan.*base.ip	11	2
A	scan.*base.getErrs	2	1
A	scan.*base.setDistro	10	1
A	scan.parseStatus	17	3
B	scan.*base.runningContainers	23	8
C	scan.detectWp	27	10
A	scan.*base.setServerInfo	2	1
A	scan.*base.isAwsInstanceID	2	1
A	scan.*base.parseDockerPs	17	5
A	scan.*base.detectPlatform	21	4
F	scan.detectWpPlugin	67	22
F	scan.detectWpTheme	67	22
A	scan.*base.wpConvertToModel	2	1
A	scan.*base.setErrs	2	1
B	scan.*base.parseLxdPs	19	6
A	scan.*base.lxcPs	7	2
A	scan.unset	5	2
A	scan.*base.getDistro	2	1
B	scan.*base.scanWp	16	6
A	scan.*base.dockerPs	7	2
A	scan.*base.exec	2	1
A	scan.*base.runningKernel	19	5
C	scan.*base.detectRunningOnAws	43	9
B	scan.*base.allContainers	23	8
A	scan.*base.parseSystemctlStatus	9	3
B	scan.*base.convertToModel	34	5
B	scan.*base.exitedContainers	23	8
A	scan.*base.setPlatform	2	1
F	scan.detectWpCore	43	14
A	scan.*base.getPlatform	2	1
A	scan.*base.detectServiceName	7	2
B	scan.*base.parseIP	21	7
A	scan.*base.parseLxcPs	13	4
A	scan.*base.getServerInfo	2	1
C	scan.*base.detectInitSystem	30	11

/* Vuls - Vulnerability Scanner
Copyright (C) 2016  Future Corporation , Japan.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package scan

import (
	"bufio"
	"encoding/json"
	"fmt"
	"net"
	"regexp"
	"strings"
	"time"

	"github.com/future-architect/vuls/config"
	"github.com/future-architect/vuls/models"
	"github.com/hashicorp/go-version"
	"github.com/sirupsen/logrus"
)

type base struct {
	ServerInfo config.ServerInfo
	Distro     config.Distro
	Platform   models.Platform
	osPackages

	log  *logrus.Entry
	errs []error
}

func (l *base) scanWp() (err error) {
	if len(l.ServerInfo.WpPath) == 0 && len(l.ServerInfo.WpToken) == 0 {
		return nil
	}

	var unsecures []models.VulnInfo
	if unsecures, err = detectWp(l.ServerInfo); err != nil {
		l.log.Errorf("Failed to scan wordpress: %s", err)
		return err
	}
	l.WpVulnInfos = map[string]models.VulnInfo{}
	for _, i := range unsecures {
		l.WpVulnInfos[i.CveID] = i
	}

	return
}

//WpCveInfos is for wpvulndb's json
type WpCveInfos struct {
	ReleaseDate     string      `json:"release_date"`
	ChangelogURL    string      `json:"changelog_url"`
	Status          string      `json:"status"`
	LatestVersion   string      `json:"latest_version"`
	LastUpdated     string      `json:"last_updated"`
	Popular         bool        `json:"popular"`
	Vulnerabilities []WpCveInfo `json:"vulnerabilities"`
	Error           string      `json:"error"`
}

//WpCveInfo is for wpvulndb's json
type WpCveInfo struct {
	ID            int        `json:"id"`
	Title         string     `json:"title"`
	CreatedAt     string     `json:"created_at"`
	UpdatedAt     string     `json:"updated_at"`
	PublishedDate string     `json:"Published_date"`
	VulnType      string     `json:"Vuln_type"`
	References    References `json:"references"`
	FixedIn       string     `json:"fixed_in"`
}

//References is for wpvulndb's json
type References struct {
	URL     []string `json:"url"`
	Cve     []string `json:"cve"`
	Secunia []string `json:"secunia"`
}

func detectWp(c config.ServerInfo) (rs []models.VulnInfo, err error) {

	var coreVuln []models.VulnInfo
	if coreVuln, err = detectWpCore(c); err != nil {
		return
	}
	for _, i := range coreVuln {
		rs = append(rs, i)
	}

	var themeVuln []models.VulnInfo
	if themeVuln, err = detectWpTheme(c); err != nil {
		return
	}
	for _, i := range themeVuln {
		rs = append(rs, i)
	}

	var pluginVuln []models.VulnInfo
	if pluginVuln, err = detectWpPlugin(c); err != nil {
		return
	}
	for _, i := range pluginVuln {
		rs = append(rs, i)
	}

	return
}

func detectWpCore(c config.ServerInfo) (rs []models.VulnInfo, err error) {
	cmd := fmt.Sprintf("wp core version --path=%s", c.WpPath)

	var coreVersion string
	if r := exec(c, cmd, noSudo); r.isSuccess() {
		tmp := strings.Split(r.Stdout, ".")
		coreVersion = strings.Join(tmp, "")
		coreVersion = strings.TrimRight(coreVersion, "\r\n")
		if len(coreVersion) == 0 {
			return
		}
	}
	cmd = fmt.Sprintf("curl -k -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/wordpresses/%s", c.WpToken, coreVersion)
	if r := exec(c, cmd, noSudo); r.isSuccess() {
		data := map[string]WpCveInfos{}
		if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
			return
		}
		for _, i := range data {
			if len(i.Vulnerabilities) == 0 {
				continue
			}
			for _, e := range i.Vulnerabilities {
				var cveIDs []string
				for _, k := range e.References.Cve {
					cveIDs = append(cveIDs, "CVE-"+k)
				}

				for _, cveID := range cveIDs {
					rs = append(rs, models.VulnInfo{
						CveID: cveID,
						CveContents: models.NewCveContents(
							models.CveContent{
								CveID: cveID,
								Title: e.Title,
							},
						),
					})
				}
			}
		}
	}
	return
}

//WpStatus is for wp command
type WpStatus struct {
	Name    string `json:"-"`
	Status  string `json:"-"`
	Update  string `json:"-"`
	Version string `json:"-"`
}

func detectWpTheme(c config.ServerInfo) (rs []models.VulnInfo, err error) {
	cmd := fmt.Sprintf("wp theme list --path=%s", c.WpPath)

	var themes []WpStatus
	if r := exec(c, cmd, noSudo); r.isSuccess() {
		themes = parseStatus(r.Stdout)
	}

	for _, theme := range themes {
		cmd := fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/themes/%s", c.WpToken, theme.Name)
		if r := exec(c, cmd, noSudo); r.isSuccess() {
			data := map[string]WpCveInfos{}
			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
				var jsonError WpCveInfos
				if err = json.Unmarshal([]byte(r.Stdout), &jsonError); err != nil {
					return
				}
				continue
			}
			for _, i := range data {
				if len(i.Vulnerabilities) == 0 {
					continue
				}
				if len(i.Error) != 0 {
					continue
				}
				for _, e := range i.Vulnerabilities {
					if len(e.FixedIn) == 0 {
						e.FixedIn = "0"
					}
					var v1 *version.Version
					v1, err = version.NewVersion(theme.Version)
					if err != nil {
						return
					}
					var v2 *version.Version
					v2, err = version.NewVersion(e.FixedIn)
					if err != nil {
						return
					}
					if v1.LessThan(v2) {
						if len(e.References.Cve) == 0 {
							continue
						}
						var cveIDs []string
						for _, k := range e.References.Cve {
							cveIDs = append(cveIDs, "CVE-"+k)
						}

						for _, cveID := range cveIDs {
							rs = append(rs, models.VulnInfo{
								CveID: cveID,
								CveContents: models.NewCveContents(
									models.CveContent{
										CveID: cveID,
										Title: e.Title,
									},
								),
							})
						}
					}
				}
			}

		}
	}
	return
}

func detectWpPlugin(c config.ServerInfo) (rs []models.VulnInfo, err error) {
	cmd := fmt.Sprintf("wp plugin list --path=%s", c.WpPath)

	var plugins []WpStatus
	if r := exec(c, cmd, noSudo); r.isSuccess() {
		plugins = parseStatus(r.Stdout)
	}

	for _, plugin := range plugins {
		cmd := fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/plugins/%s", c.WpToken, plugin.Name)

		if r := exec(c, cmd, noSudo); r.isSuccess() {
			data := map[string]WpCveInfos{}
			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
				var jsonError WpCveInfos
				if err = json.Unmarshal([]byte(r.Stdout), &jsonError); err != nil {
					return
				}
				continue
			}
			for _, i := range data {
				if len(i.Vulnerabilities) == 0 {
					continue
				}
				if len(i.Error) != 0 {
					continue
				}
				for _, e := range i.Vulnerabilities {
					if len(e.FixedIn) == 0 {
						e.FixedIn = "0"
					}
					var v1 *version.Version
					v1, err = version.NewVersion(plugin.Version)
					if err != nil {
						return
					}
					var v2 *version.Version
					v2, err = version.NewVersion(e.FixedIn)
					if err != nil {
						return
					}
					if v1.LessThan(v2) {
						if len(e.References.Cve) == 0 {
							continue
						}
						var cveIDs []string
						for _, k := range e.References.Cve {
							cveIDs = append(cveIDs, "CVE-"+k)
						}

						for _, cveID := range cveIDs {
							rs = append(rs, models.VulnInfo{
								CveID: cveID,
								CveContents: models.NewCveContents(
									models.CveContent{
										CveID: cveID,
										Title: e.Title,
									},
								),
							})
						}
					}
				}
			}
		}
	}
	return
}

func parseStatus(r string) (themes []WpStatus) {
	tmp := strings.Split(r, "\r\n")
	tmp = unset(tmp, 0)
	tmp = unset(tmp, 0)
	tmp = unset(tmp, 0)
	tmp = unset(tmp, len(tmp)-1)
	tmp = unset(tmp, len(tmp)-1)
	for _, k := range tmp {
		theme := strings.Split(k, "|")
		themes = append(themes, WpStatus{
			Name:    strings.TrimSpace(theme[1]),
			Status:  strings.TrimSpace(theme[2]),
			Update:  strings.TrimSpace(theme[3]),
			Version: strings.TrimSpace(theme[4]),
		})
	}
	return
}

func unset(s []string, i int) []string {
	if i >= len(s) {
		return s
	}
	return append(s[:i], s[i+1:]...)
}

func (l *base) wpConvertToModel() models.VulnInfos {
	return l.WpVulnInfos
}

func (l *base) exec(cmd string, sudo bool) execResult {
	return exec(l.ServerInfo, cmd, sudo, l.log)
}

func (l *base) setServerInfo(c config.ServerInfo) {
	l.ServerInfo = c
}

func (l *base) getServerInfo() config.ServerInfo {
	return l.ServerInfo
}

func (l *base) setDistro(fam, rel string) {
	d := config.Distro{
		Family:  fam,
		Release: rel,
	}
	l.Distro = d

	s := l.getServerInfo()
	s.Distro = d
	l.setServerInfo(s)
}

func (l *base) getDistro() config.Distro {
	return l.Distro
}

func (l *base) setPlatform(p models.Platform) {
	l.Platform = p
}

func (l *base) getPlatform() models.Platform {
	return l.Platform
}

func (l *base) runningKernel() (release, version string, err error) {
	r := l.exec("uname -r", noSudo)
	if !r.isSuccess() {
		return "", "", fmt.Errorf("Failed to SSH: %s", r)
	}
	release = strings.TrimSpace(r.Stdout)

	switch l.Distro.Family {
	case config.Debian:
		r := l.exec("uname -a", noSudo)
		if !r.isSuccess() {
			return "", "", fmt.Errorf("Failed to SSH: %s", r)
		}
		ss := strings.Fields(r.Stdout)
		if 6 < len(ss) {
			version = ss[6]
		}
	}
	return
}

func (l *base) allContainers() (containers []config.Container, err error) {
	switch l.ServerInfo.ContainerType {
	case "", "docker":
		stdout, err := l.dockerPs("-a --format '{{.ID}} {{.Names}} {{.Image}}'")
		if err != nil {
			return containers, err
		}
		return l.parseDockerPs(stdout)
	case "lxd":
		stdout, err := l.lxdPs("-c n")
		if err != nil {
			return containers, err
		}
		return l.parseLxdPs(stdout)
	case "lxc":
		stdout, err := l.lxcPs("-1")
		if err != nil {
			return containers, err
		}
		return l.parseLxcPs(stdout)
	default:
		return containers, fmt.Errorf(
			"Not supported yet: %s", l.ServerInfo.ContainerType)
	}
}

func (l *base) runningContainers() (containers []config.Container, err error) {
	switch l.ServerInfo.ContainerType {
	case "", "docker":
		stdout, err := l.dockerPs("--format '{{.ID}} {{.Names}} {{.Image}}'")
		if err != nil {
			return containers, err
		}
		return l.parseDockerPs(stdout)
	case "lxd":
		stdout, err := l.lxdPs("volatile.last_state.power=RUNNING -c n")
		if err != nil {
			return containers, err
		}
		return l.parseLxdPs(stdout)
	case "lxc":
		stdout, err := l.lxcPs("-1 --running")
		if err != nil {
			return containers, err
		}
		return l.parseLxcPs(stdout)
	default:
		return containers, fmt.Errorf(
			"Not supported yet: %s", l.ServerInfo.ContainerType)
	}
}

func (l *base) exitedContainers() (containers []config.Container, err error) {
	switch l.ServerInfo.ContainerType {
	case "", "docker":
		stdout, err := l.dockerPs("--filter 'status=exited' --format '{{.ID}} {{.Names}} {{.Image}}'")
		if err != nil {
			return containers, err
		}
		return l.parseDockerPs(stdout)
	case "lxd":
		stdout, err := l.lxdPs("volatile.last_state.power=STOPPED -c n")
		if err != nil {
			return containers, err
		}
		return l.parseLxdPs(stdout)
	case "lxc":
		stdout, err := l.lxcPs("-1 --stopped")
		if err != nil {
			return containers, err
		}
		return l.parseLxcPs(stdout)
	default:
		return containers, fmt.Errorf(
			"Not supported yet: %s", l.ServerInfo.ContainerType)
	}
}

func (l *base) dockerPs(option string) (string, error) {
	cmd := fmt.Sprintf("docker ps %s", option)
	r := l.exec(cmd, noSudo)
	if !r.isSuccess() {
		return "", fmt.Errorf("Failed to SSH: %s", r)
	}
	return r.Stdout, nil
}

func (l *base) lxdPs(option string) (string, error) {
	cmd := fmt.Sprintf("lxc list %s", option)
	r := l.exec(cmd, noSudo)
	if !r.isSuccess() {
		return "", fmt.Errorf("failed to SSH: %s", r)
	}
	return r.Stdout, nil
}

func (l *base) lxcPs(option string) (string, error) {
	cmd := fmt.Sprintf("lxc-ls %s 2>/dev/null", option)
	r := l.exec(cmd, sudo)
	if !r.isSuccess() {
		return "", fmt.Errorf("failed to SSH: %s", r)
	}
	return r.Stdout, nil
}

func (l *base) parseDockerPs(stdout string) (containers []config.Container, err error) {
	lines := strings.Split(stdout, "\n")
	for _, line := range lines {
		fields := strings.Fields(line)
		if len(fields) == 0 {
			break
		}
		if len(fields) != 3 {
			return containers, fmt.Errorf("Unknown format: %s", line)
		}
		containers = append(containers, config.Container{
			ContainerID: fields[0],
			Name:        fields[1],
			Image:       fields[2],
		})
	}
	return
}

func (l *base) parseLxdPs(stdout string) (containers []config.Container, err error) {
	lines := strings.Split(stdout, "\n")
	for i, line := range lines[3:] {
		if i%2 == 1 {
			continue
		}
		fields := strings.Fields(strings.Replace(line, "|", " ", -1))
		if len(fields) == 0 {
			break
		}
		if len(fields) != 1 {
			return containers, fmt.Errorf("Unknown format: %s", line)
		}
		containers = append(containers, config.Container{
			ContainerID: fields[0],
			Name:        fields[0],
		})
	}
	return
}

func (l *base) parseLxcPs(stdout string) (containers []config.Container, err error) {
	lines := strings.Split(stdout, "\n")
	for _, line := range lines {
		fields := strings.Fields(line)
		if len(fields) == 0 {
			break
		}
		containers = append(containers, config.Container{
			ContainerID: fields[0],
			Name:        fields[0],
		})
	}
	return
}

// ip executes ip command and returns IP addresses
func (l *base) ip() ([]string, []string, error) {
	// e.g.
	// 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000\    link/ether 52:54:00:2a:86:4c brd ff:ff:ff:ff:ff:ff
	// 2: eth0    inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
	// 2: eth0    inet6 fe80::5054:ff:fe2a:864c/64 scope link \       valid_lft forever preferred_lft forever
	r := l.exec("/sbin/ip -o addr", noSudo)
	if !r.isSuccess() {
		return nil, nil, fmt.Errorf("Failed to detect IP address: %v", r)
	}
	ipv4Addrs, ipv6Addrs := l.parseIP(r.Stdout)
	return ipv4Addrs, ipv6Addrs, nil
}

// parseIP parses the results of ip command
func (l *base) parseIP(stdout string) (ipv4Addrs []string, ipv6Addrs []string) {
	lines := strings.Split(stdout, "\n")
	for _, line := range lines {
		fields := strings.Fields(line)
		if len(fields) < 4 {
			continue
		}
		ip, _, err := net.ParseCIDR(fields[3])
		if err != nil {
			continue
		}
		if !ip.IsGlobalUnicast() {
			continue
		}
		if ipv4 := ip.To4(); ipv4 != nil {
			ipv4Addrs = append(ipv4Addrs, ipv4.String())
		} else {
			ipv6Addrs = append(ipv6Addrs, ip.String())
		}
	}
	return
}

func (l *base) detectPlatform() {
	if l.getServerInfo().Mode.IsOffline() {
		l.setPlatform(models.Platform{Name: "unknown"})
		return
	}
	ok, instanceID, err := l.detectRunningOnAws()
	if err != nil {
		l.setPlatform(models.Platform{Name: "other"})
		return
	}
	if ok {
		l.setPlatform(models.Platform{
			Name:       "aws",
			InstanceID: instanceID,
		})
		return
	}

	//TODO Azure, GCP...
	l.setPlatform(models.Platform{Name: "other"})
	return
}

func (l *base) detectRunningOnAws() (ok bool, instanceID string, err error) {
	if r := l.exec("type curl", noSudo); r.isSuccess() {
		cmd := "curl --max-time 1 --noproxy 169.254.169.254 http://169.254.169.254/latest/meta-data/instance-id"
		r := l.exec(cmd, noSudo)
		if r.isSuccess() {
			id := strings.TrimSpace(r.Stdout)
			if !l.isAwsInstanceID(id) {
				return false, "", nil
			}
			return true, id, nil
		}

		switch r.ExitStatus {
		case 28, 7:
			// Not running on AWS
			//  7   Failed to connect to host.
			// 28  operation timeout.
			return false, "", nil
		}
	}

	if r := l.exec("type wget", noSudo); r.isSuccess() {
		cmd := "wget --tries=3 --timeout=1 --no-proxy -q -O - http://169.254.169.254/latest/meta-data/instance-id"
		r := l.exec(cmd, noSudo)
		if r.isSuccess() {
			id := strings.TrimSpace(r.Stdout)
			if !l.isAwsInstanceID(id) {
				return false, "", nil
			}
			return true, id, nil
		}

		switch r.ExitStatus {
		case 4, 8:
			// Not running on AWS
			// 4   Network failure
			// 8   Server issued an error response.
			return false, "", nil
		}
	}
	return false, "", fmt.Errorf(
		"Failed to curl or wget to AWS instance metadata on %s. container: %s",
		l.ServerInfo.ServerName, l.ServerInfo.Container.Name)
}

// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
var awsInstanceIDPattern = regexp.MustCompile(`^i-[0-9a-f]+$`)

func (l *base) isAwsInstanceID(str string) bool {
	return awsInstanceIDPattern.MatchString(str)
}

func (l *base) convertToModel() models.ScanResult {
	ctype := l.ServerInfo.ContainerType
	if l.ServerInfo.Container.ContainerID != "" && ctype == "" {
		ctype = "docker"
	}
	container := models.Container{
		ContainerID: l.ServerInfo.Container.ContainerID,
		Name:        l.ServerInfo.Container.Name,
		Image:       l.ServerInfo.Container.Image,
		Type:        ctype,
	}

	errs := []string{}
	for _, e := range l.errs {
		errs = append(errs, fmt.Sprintf("%s", e))
	}

	return models.ScanResult{
		JSONVersion:   models.JSONVersion,
		ServerName:    l.ServerInfo.ServerName,
		ScannedAt:     time.Now(),
		ScanMode:      l.ServerInfo.Mode.String(),
		Family:        l.Distro.Family,
		Release:       l.Distro.Release,
		Container:     container,
		Platform:      l.Platform,
		IPv4Addrs:     l.ServerInfo.IPv4Addrs,
		IPv6Addrs:     l.ServerInfo.IPv6Addrs,
		ScannedCves:   l.VulnInfos,
		RunningKernel: l.Kernel,
		Packages:      l.Packages,
		SrcPackages:   l.SrcPackages,
		Optional:      l.ServerInfo.Optional,
		Errors:        errs,
	}
}

func (l *base) setErrs(errs []error) {
	l.errs = errs
}

func (l *base) getErrs() []error {
	return l.errs
}

const (
	systemd  = "systemd"
	upstart  = "upstart"
	sysVinit = "init"
)

// https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
func (l *base) detectInitSystem() (string, error) {
	var f func(string) (string, error)
	f = func(cmd string) (string, error) {
		r := l.exec(cmd, sudo)
		if !r.isSuccess() {
			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
		}
		scanner := bufio.NewScanner(strings.NewReader(r.Stdout))
		scanner.Scan()
		line := strings.TrimSpace(scanner.Text())
		if strings.Contains(line, "systemd") {
			return systemd, nil
		} else if strings.Contains(line, "upstart") {
			return upstart, nil
		} else if strings.Contains(line, "File: ‘/proc/1/exe’ -> ‘/sbin/init’") ||
			strings.Contains(line, "File: `/proc/1/exe' -> `/sbin/init'") {
			return f("stat /sbin/init")
		} else if line == "File: ‘/sbin/init’" ||
			line == "File: `/sbin/init'" {
			r := l.exec("/sbin/init --version", noSudo)
			if r.isSuccess() {
				if strings.Contains(r.Stdout, "upstart") {
					return upstart, nil
				}
			}
			return sysVinit, nil
		}
		return "", fmt.Errorf("Failed to detect a init system: %s", line)
	}
	return f("stat /proc/1/exe")
}

func (l *base) detectServiceName(pid string) (string, error) {
	cmd := fmt.Sprintf("systemctl status --quiet --no-pager %s", pid)
	r := l.exec(cmd, noSudo)
	if !r.isSuccess() {
		return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
	}
	return l.parseSystemctlStatus(r.Stdout), nil
}

func (l *base) parseSystemctlStatus(stdout string) string {
	scanner := bufio.NewScanner(strings.NewReader(stdout))
	scanner.Scan()
	line := scanner.Text()
	ss := strings.Fields(line)
	if len(ss) < 2 || strings.HasPrefix(line, "Failed to get unit for PID") {
		return ""
	}
	return ss[1]
}


1			/* Vuls - Vulnerability Scanner
2			Copyright (C) 2016 Future Corporation , Japan.
3
4			This program is free software: you can redistribute it and/or modify
5			it under the terms of the GNU General Public License as published by
6			the Free Software Foundation, either version 3 of the License, or
7			(at your option) any later version.
8
9			This program is distributed in the hope that it will be useful,
10			but WITHOUT ANY WARRANTY; without even the implied warranty of
11			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12			GNU General Public License for more details.
13
14			You should have received a copy of the GNU General Public License
15			along with this program. If not, see <http://www.gnu.org/licenses/>.
16			*/
17
18			package scan
19
20			import (
21			"bufio"
22			"encoding/json"
23			"fmt"
24			"net"
25			"regexp"
26			"strings"
27			"time"
28
29			"github.com/future-architect/vuls/config"
30			"github.com/future-architect/vuls/models"
31			"github.com/hashicorp/go-version"
32			"github.com/sirupsen/logrus"
33			)
34
35			type base struct {
36			ServerInfo config.ServerInfo
37			Distro config.Distro
38			Platform models.Platform
39			osPackages
40
41			log *logrus.Entry
42			errs []error
43			}
44
45			func (l *base) scanWp() (err error) {
46			if len(l.ServerInfo.WpPath) == 0 && len(l.ServerInfo.WpToken) == 0 {
47			return nil
48			}
49
50			var unsecures []models.VulnInfo
51			if unsecures, err = detectWp(l.ServerInfo); err != nil {
52			l.log.Errorf("Failed to scan wordpress: %s", err)
53			return err
54			}
55			l.WpVulnInfos = map[string]models.VulnInfo{}
56			for _, i := range unsecures {
57			l.WpVulnInfos[i.CveID] = i
58			}
59
60			return
61			}
62
63			//WpCveInfos is for wpvulndb's json
64			type WpCveInfos struct {
65			ReleaseDate string `json:"release_date"`
66			ChangelogURL string `json:"changelog_url"`
67			Status string `json:"status"`
68			LatestVersion string `json:"latest_version"`
69			LastUpdated string `json:"last_updated"`
70			Popular bool `json:"popular"`
71			Vulnerabilities []WpCveInfo `json:"vulnerabilities"`
72			Error string `json:"error"`
73			}
74
75			//WpCveInfo is for wpvulndb's json
76			type WpCveInfo struct {
77			ID int `json:"id"`
78			Title string `json:"title"`
79			CreatedAt string `json:"created_at"`
80			UpdatedAt string `json:"updated_at"`
81			PublishedDate string `json:"Published_date"`
82			VulnType string `json:"Vuln_type"`
83			References References `json:"references"`
84			FixedIn string `json:"fixed_in"`
85			}
86
87			//References is for wpvulndb's json
88			type References struct {
89			URL []string `json:"url"`
90			Cve []string `json:"cve"`
91			Secunia []string `json:"secunia"`
92			}
93
94			func detectWp(c config.ServerInfo) (rs []models.VulnInfo, err error) {
95
96			var coreVuln []models.VulnInfo
97			if coreVuln, err = detectWpCore(c); err != nil {
98			return
99			}
100			for _, i := range coreVuln {
101			rs = append(rs, i)
102			}
103
104			var themeVuln []models.VulnInfo
105			if themeVuln, err = detectWpTheme(c); err != nil {
106			return
107			}
108			for _, i := range themeVuln {
109			rs = append(rs, i)
110			}
111
112			var pluginVuln []models.VulnInfo
113			if pluginVuln, err = detectWpPlugin(c); err != nil {
114			return
115			}
116			for _, i := range pluginVuln {
117			rs = append(rs, i)
118			}
119
120			return
121			}
122
123			func detectWpCore(c config.ServerInfo) (rs []models.VulnInfo, err error) {
124			cmd := fmt.Sprintf("wp core version --path=%s", c.WpPath)
125
126			var coreVersion string
127			if r := exec(c, cmd, noSudo); r.isSuccess() {
128			tmp := strings.Split(r.Stdout, ".")
129			coreVersion = strings.Join(tmp, "")
130			coreVersion = strings.TrimRight(coreVersion, "\r\n")
131			if len(coreVersion) == 0 {
132			return
133			}
134			}
135			cmd = fmt.Sprintf("curl -k -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/wordpresses/%s", c.WpToken, coreVersion)
136			if r := exec(c, cmd, noSudo); r.isSuccess() {
137			data := map[string]WpCveInfos{}
138			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
139			return
140			}
141			for _, i := range data {
142			if len(i.Vulnerabilities) == 0 {
143			continue
144			}
145			for _, e := range i.Vulnerabilities {
146			var cveIDs []string
147			for _, k := range e.References.Cve {
148			cveIDs = append(cveIDs, "CVE-"+k)
149			}
150
151			for _, cveID := range cveIDs {
152			rs = append(rs, models.VulnInfo{
153			CveID: cveID,
154			CveContents: models.NewCveContents(
155			models.CveContent{
156			CveID: cveID,
157			Title: e.Title,
158			},
159			),
160			})
161			}
162			}
163			}
164			}
165			return
166			}
167
168			//WpStatus is for wp command
169			type WpStatus struct {
170			Name string `json:"-"`
171			Status string `json:"-"`
172			Update string `json:"-"`
173			Version string `json:"-"`
174			}
175
176			func detectWpTheme(c config.ServerInfo) (rs []models.VulnInfo, err error) {
177			cmd := fmt.Sprintf("wp theme list --path=%s", c.WpPath)
178
179			var themes []WpStatus
180			if r := exec(c, cmd, noSudo); r.isSuccess() {
181			themes = parseStatus(r.Stdout)
182			}
183
184			for _, theme := range themes {
185			cmd := fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/themes/%s", c.WpToken, theme.Name)
186			if r := exec(c, cmd, noSudo); r.isSuccess() {
187			data := map[string]WpCveInfos{}
188			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
189			var jsonError WpCveInfos
190			if err = json.Unmarshal([]byte(r.Stdout), &jsonError); err != nil {
191			return
192			}
193			continue
194			}
195			for _, i := range data {
196			if len(i.Vulnerabilities) == 0 {
197			continue
198			}
199			if len(i.Error) != 0 {
200			continue
201			}
202			for _, e := range i.Vulnerabilities {
203			if len(e.FixedIn) == 0 {
204			e.FixedIn = "0"
205			}
206			var v1 *version.Version
207			v1, err = version.NewVersion(theme.Version)
208			if err != nil {
209			return
210			}
211			var v2 *version.Version
212			v2, err = version.NewVersion(e.FixedIn)
213			if err != nil {
214			return
215			}
216			if v1.LessThan(v2) {
217			if len(e.References.Cve) == 0 {
218			continue
219			}
220			var cveIDs []string
221			for _, k := range e.References.Cve {
222			cveIDs = append(cveIDs, "CVE-"+k)
223			}
224
225			for _, cveID := range cveIDs {
226			rs = append(rs, models.VulnInfo{
227			CveID: cveID,
228			CveContents: models.NewCveContents(
229			models.CveContent{
230			CveID: cveID,
231			Title: e.Title,
232			},
233			),
234			})
235			}
236			}
237			}
238			}
239
240			}
241			}
242			return
243			}
244
245			func detectWpPlugin(c config.ServerInfo) (rs []models.VulnInfo, err error) {
246			cmd := fmt.Sprintf("wp plugin list --path=%s", c.WpPath)
247
248			var plugins []WpStatus
249			if r := exec(c, cmd, noSudo); r.isSuccess() {
250			plugins = parseStatus(r.Stdout)
251			}
252
253			for _, plugin := range plugins {
254			cmd := fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/plugins/%s", c.WpToken, plugin.Name)
255
256			if r := exec(c, cmd, noSudo); r.isSuccess() {
257			data := map[string]WpCveInfos{}
258			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
259			var jsonError WpCveInfos
260			if err = json.Unmarshal([]byte(r.Stdout), &jsonError); err != nil {
261			return
262			}
263			continue
264			}
265			for _, i := range data {
266			if len(i.Vulnerabilities) == 0 {
267			continue
268			}
269			if len(i.Error) != 0 {
270			continue
271			}
272			for _, e := range i.Vulnerabilities {
273			if len(e.FixedIn) == 0 {
274			e.FixedIn = "0"
275			}
276			var v1 *version.Version
277			v1, err = version.NewVersion(plugin.Version)
278			if err != nil {
279			return
280			}
281			var v2 *version.Version
282			v2, err = version.NewVersion(e.FixedIn)
283			if err != nil {
284			return
285			}
286			if v1.LessThan(v2) {
287			if len(e.References.Cve) == 0 {
288			continue
289			}
290			var cveIDs []string
291			for _, k := range e.References.Cve {
292			cveIDs = append(cveIDs, "CVE-"+k)
293			}
294
295			for _, cveID := range cveIDs {
296			rs = append(rs, models.VulnInfo{
297			CveID: cveID,
298			CveContents: models.NewCveContents(
299			models.CveContent{
300			CveID: cveID,
301			Title: e.Title,
302			},
303			),
304			})
305			}
306			}
307			}
308			}
309			}
310			}
311			return
312			}
313
314			func parseStatus(r string) (themes []WpStatus) {
315			tmp := strings.Split(r, "\r\n")
316			tmp = unset(tmp, 0)
317			tmp = unset(tmp, 0)
318			tmp = unset(tmp, 0)
319			tmp = unset(tmp, len(tmp)-1)
320			tmp = unset(tmp, len(tmp)-1)
321			for _, k := range tmp {
322			theme := strings.Split(k, "\|")
323			themes = append(themes, WpStatus{
324			Name: strings.TrimSpace(theme[1]),
325			Status: strings.TrimSpace(theme[2]),
326			Update: strings.TrimSpace(theme[3]),
327			Version: strings.TrimSpace(theme[4]),
328			})
329			}
330			return
331			}
332
333			func unset(s []string, i int) []string {
334			if i >= len(s) {
335			return s
336			}
337			return append(s[:i], s[i+1:]...)
338			}
339
340			func (l *base) wpConvertToModel() models.VulnInfos {
341			return l.WpVulnInfos
342			}
343
344			func (l *base) exec(cmd string, sudo bool) execResult {
345			return exec(l.ServerInfo, cmd, sudo, l.log)
346			}
347
348			func (l *base) setServerInfo(c config.ServerInfo) {
349			l.ServerInfo = c
350			}
351
352			func (l *base) getServerInfo() config.ServerInfo {
353			return l.ServerInfo
354			}
355
356			func (l *base) setDistro(fam, rel string) {
357			d := config.Distro{
358			Family: fam,
359			Release: rel,
360			}
361			l.Distro = d
362
363			s := l.getServerInfo()
364			s.Distro = d
365			l.setServerInfo(s)
366			}
367
368			func (l *base) getDistro() config.Distro {
369			return l.Distro
370			}
371
372			func (l *base) setPlatform(p models.Platform) {
373			l.Platform = p
374			}
375
376			func (l *base) getPlatform() models.Platform {
377			return l.Platform
378			}
379
380			func (l *base) runningKernel() (release, version string, err error) {
381			r := l.exec("uname -r", noSudo)
382			if !r.isSuccess() {
383			return "", "", fmt.Errorf("Failed to SSH: %s", r)
384			}
385			release = strings.TrimSpace(r.Stdout)
386
387			switch l.Distro.Family {
388			case config.Debian:
389			r := l.exec("uname -a", noSudo)
390			if !r.isSuccess() {
391			return "", "", fmt.Errorf("Failed to SSH: %s", r)
392			}
393			ss := strings.Fields(r.Stdout)
394			if 6 < len(ss) {
395			version = ss[6]
396			}
397			}
398			return
399			}
400
401			func (l *base) allContainers() (containers []config.Container, err error) {
402			switch l.ServerInfo.ContainerType {
403			case "", "docker":
404			stdout, err := l.dockerPs("-a --format '{{.ID}} {{.Names}} {{.Image}}'")
405			if err != nil {
406			return containers, err
407			}
408			return l.parseDockerPs(stdout)
409			case "lxd":
410			stdout, err := l.lxdPs("-c n")
411			if err != nil {
412			return containers, err
413			}
414			return l.parseLxdPs(stdout)
415			case "lxc":
416			stdout, err := l.lxcPs("-1")
417			if err != nil {
418			return containers, err
419			}
420			return l.parseLxcPs(stdout)
421			default:
422			return containers, fmt.Errorf(
423			"Not supported yet: %s", l.ServerInfo.ContainerType)
424			}
425			}
426
427			func (l *base) runningContainers() (containers []config.Container, err error) {
428			switch l.ServerInfo.ContainerType {
429			case "", "docker":
430			stdout, err := l.dockerPs("--format '{{.ID}} {{.Names}} {{.Image}}'")
431			if err != nil {
432			return containers, err
433			}
434			return l.parseDockerPs(stdout)
435			case "lxd":
436			stdout, err := l.lxdPs("volatile.last_state.power=RUNNING -c n")
437			if err != nil {
438			return containers, err
439			}
440			return l.parseLxdPs(stdout)
441			case "lxc":
442			stdout, err := l.lxcPs("-1 --running")
443			if err != nil {
444			return containers, err
445			}
446			return l.parseLxcPs(stdout)
447			default:
448			return containers, fmt.Errorf(
449			"Not supported yet: %s", l.ServerInfo.ContainerType)
450			}
451			}
452
453			func (l *base) exitedContainers() (containers []config.Container, err error) {
454			switch l.ServerInfo.ContainerType {
455			case "", "docker":
456			stdout, err := l.dockerPs("--filter 'status=exited' --format '{{.ID}} {{.Names}} {{.Image}}'")
457			if err != nil {
458			return containers, err
459			}
460			return l.parseDockerPs(stdout)
461			case "lxd":
462			stdout, err := l.lxdPs("volatile.last_state.power=STOPPED -c n")
463			if err != nil {
464			return containers, err
465			}
466			return l.parseLxdPs(stdout)
467			case "lxc":
468			stdout, err := l.lxcPs("-1 --stopped")
469			if err != nil {
470			return containers, err
471			}
472			return l.parseLxcPs(stdout)
473			default:
474			return containers, fmt.Errorf(
475			"Not supported yet: %s", l.ServerInfo.ContainerType)
476			}
477			}
478
479			func (l *base) dockerPs(option string) (string, error) {
480			cmd := fmt.Sprintf("docker ps %s", option)
481			r := l.exec(cmd, noSudo)
482			if !r.isSuccess() {
483			return "", fmt.Errorf("Failed to SSH: %s", r)
484			}
485			return r.Stdout, nil
486			}
487
488			func (l *base) lxdPs(option string) (string, error) {
489			cmd := fmt.Sprintf("lxc list %s", option)
490			r := l.exec(cmd, noSudo)
491			if !r.isSuccess() {
492			return "", fmt.Errorf("failed to SSH: %s", r)
493			}
494			return r.Stdout, nil
495			}
496
497			func (l *base) lxcPs(option string) (string, error) {
498			cmd := fmt.Sprintf("lxc-ls %s 2>/dev/null", option)
499			r := l.exec(cmd, sudo)
500			if !r.isSuccess() {
501			return "", fmt.Errorf("failed to SSH: %s", r)
502			}
503			return r.Stdout, nil
504			}
505
506			func (l *base) parseDockerPs(stdout string) (containers []config.Container, err error) {
507			lines := strings.Split(stdout, "\n")
508			for _, line := range lines {
509			fields := strings.Fields(line)
510			if len(fields) == 0 {
511			break
512			}
513			if len(fields) != 3 {
514			return containers, fmt.Errorf("Unknown format: %s", line)
515			}
516			containers = append(containers, config.Container{
517			ContainerID: fields[0],
518			Name: fields[1],
519			Image: fields[2],
520			})
521			}
522			return
523			}
524
525			func (l *base) parseLxdPs(stdout string) (containers []config.Container, err error) {
526			lines := strings.Split(stdout, "\n")
527			for i, line := range lines[3:] {
528			if i%2 == 1 {
529			continue
530			}
531			fields := strings.Fields(strings.Replace(line, "\|", " ", -1))
532			if len(fields) == 0 {
533			break
534			}
535			if len(fields) != 1 {
536			return containers, fmt.Errorf("Unknown format: %s", line)
537			}
538			containers = append(containers, config.Container{
539			ContainerID: fields[0],
540			Name: fields[0],
541			})
542			}
543			return
544			}
545
546			func (l *base) parseLxcPs(stdout string) (containers []config.Container, err error) {
547			lines := strings.Split(stdout, "\n")
548			for _, line := range lines {
549			fields := strings.Fields(line)
550			if len(fields) == 0 {
551			break
552			}
553			containers = append(containers, config.Container{
554			ContainerID: fields[0],
555			Name: fields[0],
556			})
557			}
558			return
559			}
560
561			// ip executes ip command and returns IP addresses
562			func (l *base) ip() ([]string, []string, error) {
563			// e.g.
564			// 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000\ link/ether 52:54:00:2a:86:4c brd ff:ff:ff:ff:ff:ff
565			// 2: eth0 inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
566			// 2: eth0 inet6 fe80::5054:ff:fe2a:864c/64 scope link \ valid_lft forever preferred_lft forever
567			r := l.exec("/sbin/ip -o addr", noSudo)
568			if !r.isSuccess() {
569			return nil, nil, fmt.Errorf("Failed to detect IP address: %v", r)
570			}
571			ipv4Addrs, ipv6Addrs := l.parseIP(r.Stdout)
572			return ipv4Addrs, ipv6Addrs, nil
573			}
574
575			// parseIP parses the results of ip command
576			func (l *base) parseIP(stdout string) (ipv4Addrs []string, ipv6Addrs []string) {
577			lines := strings.Split(stdout, "\n")
578			for _, line := range lines {
579			fields := strings.Fields(line)
580			if len(fields) < 4 {
581			continue
582			}
583			ip, _, err := net.ParseCIDR(fields[3])
584			if err != nil {
585			continue
586			}
587			if !ip.IsGlobalUnicast() {
588			continue
589			}
590			if ipv4 := ip.To4(); ipv4 != nil {
591			ipv4Addrs = append(ipv4Addrs, ipv4.String())
592			} else {
593			ipv6Addrs = append(ipv6Addrs, ip.String())
594			}
595			}
596			return
597			}
598
599			func (l *base) detectPlatform() {
600			if l.getServerInfo().Mode.IsOffline() {
601			l.setPlatform(models.Platform{Name: "unknown"})
602			return
603			}
604			ok, instanceID, err := l.detectRunningOnAws()
605			if err != nil {
606			l.setPlatform(models.Platform{Name: "other"})
607			return
608			}
609			if ok {
610			l.setPlatform(models.Platform{
611			Name: "aws",
612			InstanceID: instanceID,
613			})
614			return
615			}
616
617			//TODO Azure, GCP...
618			l.setPlatform(models.Platform{Name: "other"})
619			return
620			}
621
622			func (l *base) detectRunningOnAws() (ok bool, instanceID string, err error) {
623			if r := l.exec("type curl", noSudo); r.isSuccess() {
624			cmd := "curl --max-time 1 --noproxy 169.254.169.254 http://169.254.169.254/latest/meta-data/instance-id"
625			r := l.exec(cmd, noSudo)
626			if r.isSuccess() {
627			id := strings.TrimSpace(r.Stdout)
628			if !l.isAwsInstanceID(id) {
629			return false, "", nil
630			}
631			return true, id, nil
632			}
633
634			switch r.ExitStatus {
635			case 28, 7:
636			// Not running on AWS
637			// 7 Failed to connect to host.
638			// 28 operation timeout.
639			return false, "", nil
640			}
641			}
642
643			if r := l.exec("type wget", noSudo); r.isSuccess() {
644			cmd := "wget --tries=3 --timeout=1 --no-proxy -q -O - http://169.254.169.254/latest/meta-data/instance-id"
645			r := l.exec(cmd, noSudo)
646			if r.isSuccess() {
647			id := strings.TrimSpace(r.Stdout)
648			if !l.isAwsInstanceID(id) {
649			return false, "", nil
650			}
651			return true, id, nil
652			}
653
654			switch r.ExitStatus {
655			case 4, 8:
656			// Not running on AWS
657			// 4 Network failure
658			// 8 Server issued an error response.
659			return false, "", nil
660			}
661			}
662			return false, "", fmt.Errorf(
663			"Failed to curl or wget to AWS instance metadata on %s. container: %s",
664			l.ServerInfo.ServerName, l.ServerInfo.Container.Name)
665			}
666
667			// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
668			var awsInstanceIDPattern = regexp.MustCompile(`^i-[0-9a-f]+$`)
669
670			func (l *base) isAwsInstanceID(str string) bool {
671			return awsInstanceIDPattern.MatchString(str)
672			}
673
674			func (l *base) convertToModel() models.ScanResult {
675			ctype := l.ServerInfo.ContainerType
676			if l.ServerInfo.Container.ContainerID != "" && ctype == "" {
677			ctype = "docker"
678			}
679			container := models.Container{
680			ContainerID: l.ServerInfo.Container.ContainerID,
681			Name: l.ServerInfo.Container.Name,
682			Image: l.ServerInfo.Container.Image,
683			Type: ctype,
684			}
685
686			errs := []string{}
687			for _, e := range l.errs {
688			errs = append(errs, fmt.Sprintf("%s", e))
689			}
690
691			return models.ScanResult{
692			JSONVersion: models.JSONVersion,
693			ServerName: l.ServerInfo.ServerName,
694			ScannedAt: time.Now(),
695			ScanMode: l.ServerInfo.Mode.String(),
696			Family: l.Distro.Family,
697			Release: l.Distro.Release,
698			Container: container,
699			Platform: l.Platform,
700			IPv4Addrs: l.ServerInfo.IPv4Addrs,
701			IPv6Addrs: l.ServerInfo.IPv6Addrs,
702			ScannedCves: l.VulnInfos,
703			RunningKernel: l.Kernel,
704			Packages: l.Packages,
705			SrcPackages: l.SrcPackages,
706			Optional: l.ServerInfo.Optional,
707			Errors: errs,
708			}
709			}
710
711			func (l *base) setErrs(errs []error) {
712			l.errs = errs
713			}
714
715			func (l *base) getErrs() []error {
716			return l.errs
717			}
718
719			const (
720			systemd = "systemd"
721			upstart = "upstart"
722			sysVinit = "init"
723			)
724
725			// https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
726			func (l *base) detectInitSystem() (string, error) {
727			var f func(string) (string, error)
728			f = func(cmd string) (string, error) {
729			r := l.exec(cmd, sudo)
730			if !r.isSuccess() {
731			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
732			}
733			scanner := bufio.NewScanner(strings.NewReader(r.Stdout))
734			scanner.Scan()
735			line := strings.TrimSpace(scanner.Text())
736			if strings.Contains(line, "systemd") {
737			return systemd, nil
738			} else if strings.Contains(line, "upstart") {
739			return upstart, nil
740			} else if strings.Contains(line, "File: ‘/proc/1/exe’ -> ‘/sbin/init’") \|\|
741			strings.Contains(line, "File: `/proc/1/exe' -> `/sbin/init'") {
742			return f("stat /sbin/init")
743			} else if line == "File: ‘/sbin/init’" \|\|
744			line == "File: `/sbin/init'" {
745			r := l.exec("/sbin/init --version", noSudo)
746			if r.isSuccess() {
747			if strings.Contains(r.Stdout, "upstart") {
748			return upstart, nil
749			}
750			}
751			return sysVinit, nil
752			}
753			return "", fmt.Errorf("Failed to detect a init system: %s", line)
754			}
755			return f("stat /proc/1/exe")
756			}
757
758			func (l *base) detectServiceName(pid string) (string, error) {
759			cmd := fmt.Sprintf("systemctl status --quiet --no-pager %s", pid)
760			r := l.exec(cmd, noSudo)
761			if !r.isSuccess() {
762			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
763			}
764			return l.parseSystemctlStatus(r.Stdout), nil
765			}
766
767			func (l *base) parseSystemctlStatus(stdout string) string {
768			scanner := bufio.NewScanner(strings.NewReader(stdout))
769			scanner.Scan()
770			line := scanner.Text()
771			ss := strings.Fields(line)
772			if len(ss) < 2 \|\| strings.HasPrefix(line, "Failed to get unit for PID") {
773			return ""
774			}
775			return ss[1]
776			}
777

future-architect / vuls

Pull Request — master (#769)

scan/base.go F

Size/Duplication

Importance

36 Methods

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