scan.detectWpCore - 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 10:10 UTC

scan.detectWpCore F

↳ Parent: scan/base.go

Complexity

Conditions

Size

Total Lines	46
Code Lines	31

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	15
eloc	31
dl	0
loc	46
rs	2.9998
c	0
b	0
f	0
nop	1

How to fix Complexity

/* 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 {
				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
}

//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.References.Cve) == 0 {
						continue
					}
					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) {
						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.References.Cve) == 0 {
						continue
					}
					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			if len(e.References.Cve) == 0 {
147			continue
148			}
149			var cveIDs []string
150			for _, k := range e.References.Cve {
151			cveIDs = append(cveIDs, "CVE-"+k)
152			}
153
154			for _, cveID := range cveIDs {
155			rs = append(rs, models.VulnInfo{
156			CveID: cveID,
157			CveContents: models.NewCveContents(
158			models.CveContent{
159			CveID: cveID,
160			Title: e.Title,
161			},
162			),
163			})
164			}
165			}
166			}
167			}
168			return
169			}
170
171			//WpStatus is for wp command
172			type WpStatus struct {
173			Name string `json:"-"`
174			Status string `json:"-"`
175			Update string `json:"-"`
176			Version string `json:"-"`
177			}
178
179			func detectWpTheme(c config.ServerInfo) (rs []models.VulnInfo, err error) {
180			cmd := fmt.Sprintf("wp theme list --path=%s", c.WpPath)
181
182			var themes []WpStatus
183			if r := exec(c, cmd, noSudo); r.isSuccess() {
184			themes = parseStatus(r.Stdout)
185			}
186
187			for _, theme := range themes {
188			cmd := fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/themes/%s", c.WpToken, theme.Name)
189			if r := exec(c, cmd, noSudo); r.isSuccess() {
190			data := map[string]WpCveInfos{}
191			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
192			var jsonError WpCveInfos
193			if err = json.Unmarshal([]byte(r.Stdout), &jsonError); err != nil {
194			return
195			}
196			continue
197			}
198			for _, i := range data {
199			if len(i.Vulnerabilities) == 0 {
200			continue
201			}
202			if len(i.Error) != 0 {
203			continue
204			}
205			for _, e := range i.Vulnerabilities {
206			if len(e.References.Cve) == 0 {
207			continue
208			}
209			if len(e.FixedIn) == 0 {
210			e.FixedIn = "0"
211			}
212			var v1 *version.Version
213			v1, err = version.NewVersion(theme.Version)
214			if err != nil {
215			return
216			}
217			var v2 *version.Version
218			v2, err = version.NewVersion(e.FixedIn)
219			if err != nil {
220			return
221			}
222			if v1.LessThan(v2) {
223			var cveIDs []string
224			for _, k := range e.References.Cve {
225			cveIDs = append(cveIDs, "CVE-"+k)
226			}
227
228			for _, cveID := range cveIDs {
229			rs = append(rs, models.VulnInfo{
230			CveID: cveID,
231			CveContents: models.NewCveContents(
232			models.CveContent{
233			CveID: cveID,
234			Title: e.Title,
235			},
236			),
237			})
238			}
239			}
240			}
241			}
242
243			}
244			}
245			return
246			}
247
248			func detectWpPlugin(c config.ServerInfo) (rs []models.VulnInfo, err error) {
249			cmd := fmt.Sprintf("wp plugin list --path=%s", c.WpPath)
250
251			var plugins []WpStatus
252			if r := exec(c, cmd, noSudo); r.isSuccess() {
253			plugins = parseStatus(r.Stdout)
254			}
255
256			for _, plugin := range plugins {
257			cmd := fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/plugins/%s", c.WpToken, plugin.Name)
258
259			if r := exec(c, cmd, noSudo); r.isSuccess() {
260			data := map[string]WpCveInfos{}
261			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
262			var jsonError WpCveInfos
263			if err = json.Unmarshal([]byte(r.Stdout), &jsonError); err != nil {
264			return
265			}
266			continue
267			}
268			for _, i := range data {
269			if len(i.Vulnerabilities) == 0 {
270			continue
271			}
272			if len(i.Error) != 0 {
273			continue
274			}
275			for _, e := range i.Vulnerabilities {
276			if len(e.References.Cve) == 0 {
277			continue
278			}
279			if len(e.FixedIn) == 0 {
280			e.FixedIn = "0"
281			}
282			var v1 *version.Version
283			v1, err = version.NewVersion(plugin.Version)
284			if err != nil {
285			return
286			}
287			var v2 *version.Version
288			v2, err = version.NewVersion(e.FixedIn)
289			if err != nil {
290			return
291			}
292			if v1.LessThan(v2) {
293			if len(e.References.Cve) == 0 {
294			continue
295			}
296			var cveIDs []string
297			for _, k := range e.References.Cve {
298			cveIDs = append(cveIDs, "CVE-"+k)
299			}
300
301			for _, cveID := range cveIDs {
302			rs = append(rs, models.VulnInfo{
303			CveID: cveID,
304			CveContents: models.NewCveContents(
305			models.CveContent{
306			CveID: cveID,
307			Title: e.Title,
308			},
309			),
310			})
311			}
312			}
313			}
314			}
315			}
316			}
317			return
318			}
319
320			func parseStatus(r string) (themes []WpStatus) {
321			tmp := strings.Split(r, "\r\n")
322			tmp = unset(tmp, 0)
323			tmp = unset(tmp, 0)
324			tmp = unset(tmp, 0)
325			tmp = unset(tmp, len(tmp)-1)
326			tmp = unset(tmp, len(tmp)-1)
327			for _, k := range tmp {
328			theme := strings.Split(k, "\|")
329			themes = append(themes, WpStatus{
330			Name: strings.TrimSpace(theme[1]),
331			Status: strings.TrimSpace(theme[2]),
332			Update: strings.TrimSpace(theme[3]),
333			Version: strings.TrimSpace(theme[4]),
334			})
335			}
336			return
337			}
338
339			func unset(s []string, i int) []string {
340			if i >= len(s) {
341			return s
342			}
343			return append(s[:i], s[i+1:]...)
344			}
345
346			func (l *base) wpConvertToModel() models.VulnInfos {
347			return l.WpVulnInfos
348			}
349
350			func (l *base) exec(cmd string, sudo bool) execResult {
351			return exec(l.ServerInfo, cmd, sudo, l.log)
352			}
353
354			func (l *base) setServerInfo(c config.ServerInfo) {
355			l.ServerInfo = c
356			}
357
358			func (l *base) getServerInfo() config.ServerInfo {
359			return l.ServerInfo
360			}
361
362			func (l *base) setDistro(fam, rel string) {
363			d := config.Distro{
364			Family: fam,
365			Release: rel,
366			}
367			l.Distro = d
368
369			s := l.getServerInfo()
370			s.Distro = d
371			l.setServerInfo(s)
372			}
373
374			func (l *base) getDistro() config.Distro {
375			return l.Distro
376			}
377
378			func (l *base) setPlatform(p models.Platform) {
379			l.Platform = p
380			}
381
382			func (l *base) getPlatform() models.Platform {
383			return l.Platform
384			}
385
386			func (l *base) runningKernel() (release, version string, err error) {
387			r := l.exec("uname -r", noSudo)
388			if !r.isSuccess() {
389			return "", "", fmt.Errorf("Failed to SSH: %s", r)
390			}
391			release = strings.TrimSpace(r.Stdout)
392
393			switch l.Distro.Family {
394			case config.Debian:
395			r := l.exec("uname -a", noSudo)
396			if !r.isSuccess() {
397			return "", "", fmt.Errorf("Failed to SSH: %s", r)
398			}
399			ss := strings.Fields(r.Stdout)
400			if 6 < len(ss) {
401			version = ss[6]
402			}
403			}
404			return
405			}
406
407			func (l *base) allContainers() (containers []config.Container, err error) {
408			switch l.ServerInfo.ContainerType {
409			case "", "docker":
410			stdout, err := l.dockerPs("-a --format '{{.ID}} {{.Names}} {{.Image}}'")
411			if err != nil {
412			return containers, err
413			}
414			return l.parseDockerPs(stdout)
415			case "lxd":
416			stdout, err := l.lxdPs("-c n")
417			if err != nil {
418			return containers, err
419			}
420			return l.parseLxdPs(stdout)
421			case "lxc":
422			stdout, err := l.lxcPs("-1")
423			if err != nil {
424			return containers, err
425			}
426			return l.parseLxcPs(stdout)
427			default:
428			return containers, fmt.Errorf(
429			"Not supported yet: %s", l.ServerInfo.ContainerType)
430			}
431			}
432
433			func (l *base) runningContainers() (containers []config.Container, err error) {
434			switch l.ServerInfo.ContainerType {
435			case "", "docker":
436			stdout, err := l.dockerPs("--format '{{.ID}} {{.Names}} {{.Image}}'")
437			if err != nil {
438			return containers, err
439			}
440			return l.parseDockerPs(stdout)
441			case "lxd":
442			stdout, err := l.lxdPs("volatile.last_state.power=RUNNING -c n")
443			if err != nil {
444			return containers, err
445			}
446			return l.parseLxdPs(stdout)
447			case "lxc":
448			stdout, err := l.lxcPs("-1 --running")
449			if err != nil {
450			return containers, err
451			}
452			return l.parseLxcPs(stdout)
453			default:
454			return containers, fmt.Errorf(
455			"Not supported yet: %s", l.ServerInfo.ContainerType)
456			}
457			}
458
459			func (l *base) exitedContainers() (containers []config.Container, err error) {
460			switch l.ServerInfo.ContainerType {
461			case "", "docker":
462			stdout, err := l.dockerPs("--filter 'status=exited' --format '{{.ID}} {{.Names}} {{.Image}}'")
463			if err != nil {
464			return containers, err
465			}
466			return l.parseDockerPs(stdout)
467			case "lxd":
468			stdout, err := l.lxdPs("volatile.last_state.power=STOPPED -c n")
469			if err != nil {
470			return containers, err
471			}
472			return l.parseLxdPs(stdout)
473			case "lxc":
474			stdout, err := l.lxcPs("-1 --stopped")
475			if err != nil {
476			return containers, err
477			}
478			return l.parseLxcPs(stdout)
479			default:
480			return containers, fmt.Errorf(
481			"Not supported yet: %s", l.ServerInfo.ContainerType)
482			}
483			}
484
485			func (l *base) dockerPs(option string) (string, error) {
486			cmd := fmt.Sprintf("docker ps %s", option)
487			r := l.exec(cmd, noSudo)
488			if !r.isSuccess() {
489			return "", fmt.Errorf("Failed to SSH: %s", r)
490			}
491			return r.Stdout, nil
492			}
493
494			func (l *base) lxdPs(option string) (string, error) {
495			cmd := fmt.Sprintf("lxc list %s", option)
496			r := l.exec(cmd, noSudo)
497			if !r.isSuccess() {
498			return "", fmt.Errorf("failed to SSH: %s", r)
499			}
500			return r.Stdout, nil
501			}
502
503			func (l *base) lxcPs(option string) (string, error) {
504			cmd := fmt.Sprintf("lxc-ls %s 2>/dev/null", option)
505			r := l.exec(cmd, sudo)
506			if !r.isSuccess() {
507			return "", fmt.Errorf("failed to SSH: %s", r)
508			}
509			return r.Stdout, nil
510			}
511
512			func (l *base) parseDockerPs(stdout string) (containers []config.Container, err error) {
513			lines := strings.Split(stdout, "\n")
514			for _, line := range lines {
515			fields := strings.Fields(line)
516			if len(fields) == 0 {
517			break
518			}
519			if len(fields) != 3 {
520			return containers, fmt.Errorf("Unknown format: %s", line)
521			}
522			containers = append(containers, config.Container{
523			ContainerID: fields[0],
524			Name: fields[1],
525			Image: fields[2],
526			})
527			}
528			return
529			}
530
531			func (l *base) parseLxdPs(stdout string) (containers []config.Container, err error) {
532			lines := strings.Split(stdout, "\n")
533			for i, line := range lines[3:] {
534			if i%2 == 1 {
535			continue
536			}
537			fields := strings.Fields(strings.Replace(line, "\|", " ", -1))
538			if len(fields) == 0 {
539			break
540			}
541			if len(fields) != 1 {
542			return containers, fmt.Errorf("Unknown format: %s", line)
543			}
544			containers = append(containers, config.Container{
545			ContainerID: fields[0],
546			Name: fields[0],
547			})
548			}
549			return
550			}
551
552			func (l *base) parseLxcPs(stdout string) (containers []config.Container, err error) {
553			lines := strings.Split(stdout, "\n")
554			for _, line := range lines {
555			fields := strings.Fields(line)
556			if len(fields) == 0 {
557			break
558			}
559			containers = append(containers, config.Container{
560			ContainerID: fields[0],
561			Name: fields[0],
562			})
563			}
564			return
565			}
566
567			// ip executes ip command and returns IP addresses
568			func (l *base) ip() ([]string, []string, error) {
569			// e.g.
570			// 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
571			// 2: eth0 inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
572			// 2: eth0 inet6 fe80::5054:ff:fe2a:864c/64 scope link \ valid_lft forever preferred_lft forever
573			r := l.exec("/sbin/ip -o addr", noSudo)
574			if !r.isSuccess() {
575			return nil, nil, fmt.Errorf("Failed to detect IP address: %v", r)
576			}
577			ipv4Addrs, ipv6Addrs := l.parseIP(r.Stdout)
578			return ipv4Addrs, ipv6Addrs, nil
579			}
580
581			// parseIP parses the results of ip command
582			func (l *base) parseIP(stdout string) (ipv4Addrs []string, ipv6Addrs []string) {
583			lines := strings.Split(stdout, "\n")
584			for _, line := range lines {
585			fields := strings.Fields(line)
586			if len(fields) < 4 {
587			continue
588			}
589			ip, _, err := net.ParseCIDR(fields[3])
590			if err != nil {
591			continue
592			}
593			if !ip.IsGlobalUnicast() {
594			continue
595			}
596			if ipv4 := ip.To4(); ipv4 != nil {
597			ipv4Addrs = append(ipv4Addrs, ipv4.String())
598			} else {
599			ipv6Addrs = append(ipv6Addrs, ip.String())
600			}
601			}
602			return
603			}
604
605			func (l *base) detectPlatform() {
606			if l.getServerInfo().Mode.IsOffline() {
607			l.setPlatform(models.Platform{Name: "unknown"})
608			return
609			}
610			ok, instanceID, err := l.detectRunningOnAws()
611			if err != nil {
612			l.setPlatform(models.Platform{Name: "other"})
613			return
614			}
615			if ok {
616			l.setPlatform(models.Platform{
617			Name: "aws",
618			InstanceID: instanceID,
619			})
620			return
621			}
622
623			//TODO Azure, GCP...
624			l.setPlatform(models.Platform{Name: "other"})
625			return
626			}
627
628			func (l *base) detectRunningOnAws() (ok bool, instanceID string, err error) {
629			if r := l.exec("type curl", noSudo); r.isSuccess() {
630			cmd := "curl --max-time 1 --noproxy 169.254.169.254 http://169.254.169.254/latest/meta-data/instance-id"
631			r := l.exec(cmd, noSudo)
632			if r.isSuccess() {
633			id := strings.TrimSpace(r.Stdout)
634			if !l.isAwsInstanceID(id) {
635			return false, "", nil
636			}
637			return true, id, nil
638			}
639
640			switch r.ExitStatus {
641			case 28, 7:
642			// Not running on AWS
643			// 7 Failed to connect to host.
644			// 28 operation timeout.
645			return false, "", nil
646			}
647			}
648
649			if r := l.exec("type wget", noSudo); r.isSuccess() {
650			cmd := "wget --tries=3 --timeout=1 --no-proxy -q -O - http://169.254.169.254/latest/meta-data/instance-id"
651			r := l.exec(cmd, noSudo)
652			if r.isSuccess() {
653			id := strings.TrimSpace(r.Stdout)
654			if !l.isAwsInstanceID(id) {
655			return false, "", nil
656			}
657			return true, id, nil
658			}
659
660			switch r.ExitStatus {
661			case 4, 8:
662			// Not running on AWS
663			// 4 Network failure
664			// 8 Server issued an error response.
665			return false, "", nil
666			}
667			}
668			return false, "", fmt.Errorf(
669			"Failed to curl or wget to AWS instance metadata on %s. container: %s",
670			l.ServerInfo.ServerName, l.ServerInfo.Container.Name)
671			}
672
673			// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
674			var awsInstanceIDPattern = regexp.MustCompile(`^i-[0-9a-f]+$`)
675
676			func (l *base) isAwsInstanceID(str string) bool {
677			return awsInstanceIDPattern.MatchString(str)
678			}
679
680			func (l *base) convertToModel() models.ScanResult {
681			ctype := l.ServerInfo.ContainerType
682			if l.ServerInfo.Container.ContainerID != "" && ctype == "" {
683			ctype = "docker"
684			}
685			container := models.Container{
686			ContainerID: l.ServerInfo.Container.ContainerID,
687			Name: l.ServerInfo.Container.Name,
688			Image: l.ServerInfo.Container.Image,
689			Type: ctype,
690			}
691
692			errs := []string{}
693			for _, e := range l.errs {
694			errs = append(errs, fmt.Sprintf("%s", e))
695			}
696
697			return models.ScanResult{
698			JSONVersion: models.JSONVersion,
699			ServerName: l.ServerInfo.ServerName,
700			ScannedAt: time.Now(),
701			ScanMode: l.ServerInfo.Mode.String(),
702			Family: l.Distro.Family,
703			Release: l.Distro.Release,
704			Container: container,
705			Platform: l.Platform,
706			IPv4Addrs: l.ServerInfo.IPv4Addrs,
707			IPv6Addrs: l.ServerInfo.IPv6Addrs,
708			ScannedCves: l.VulnInfos,
709			RunningKernel: l.Kernel,
710			Packages: l.Packages,
711			SrcPackages: l.SrcPackages,
712			Optional: l.ServerInfo.Optional,
713			Errors: errs,
714			}
715			}
716
717			func (l *base) setErrs(errs []error) {
718			l.errs = errs
719			}
720
721			func (l *base) getErrs() []error {
722			return l.errs
723			}
724
725			const (
726			systemd = "systemd"
727			upstart = "upstart"
728			sysVinit = "init"
729			)
730
731			// https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
732			func (l *base) detectInitSystem() (string, error) {
733			var f func(string) (string, error)
734			f = func(cmd string) (string, error) {
735			r := l.exec(cmd, sudo)
736			if !r.isSuccess() {
737			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
738			}
739			scanner := bufio.NewScanner(strings.NewReader(r.Stdout))
740			scanner.Scan()
741			line := strings.TrimSpace(scanner.Text())
742			if strings.Contains(line, "systemd") {
743			return systemd, nil
744			} else if strings.Contains(line, "upstart") {
745			return upstart, nil
746			} else if strings.Contains(line, "File: ‘/proc/1/exe’ -> ‘/sbin/init’") \|\|
747			strings.Contains(line, "File: `/proc/1/exe' -> `/sbin/init'") {
748			return f("stat /sbin/init")
749			} else if line == "File: ‘/sbin/init’" \|\|
750			line == "File: `/sbin/init'" {
751			r := l.exec("/sbin/init --version", noSudo)
752			if r.isSuccess() {
753			if strings.Contains(r.Stdout, "upstart") {
754			return upstart, nil
755			}
756			}
757			return sysVinit, nil
758			}
759			return "", fmt.Errorf("Failed to detect a init system: %s", line)
760			}
761			return f("stat /proc/1/exe")
762			}
763
764			func (l *base) detectServiceName(pid string) (string, error) {
765			cmd := fmt.Sprintf("systemctl status --quiet --no-pager %s", pid)
766			r := l.exec(cmd, noSudo)
767			if !r.isSuccess() {
768			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
769			}
770			return l.parseSystemctlStatus(r.Stdout), nil
771			}
772
773			func (l *base) parseSystemctlStatus(stdout string) string {
774			scanner := bufio.NewScanner(strings.NewReader(stdout))
775			scanner.Scan()
776			line := scanner.Text()
777			ss := strings.Fields(line)
778			if len(ss) < 2 \|\| strings.HasPrefix(line, "Failed to get unit for PID") {
779			return ""
780			}
781			return ss[1]
782			}
783

future-architect / vuls

Pull Request — master (#769)

scan.detectWpCore F

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