scan.contentConvertVinfo - Code Metrics - Inspection of "WordPress Vulnerability Scan (core, plugin, theme)" - future-architect/vuls - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#769)

unknown

created 2019-02-04 16:10 UTC

scan.contentConvertVinfo F

↳ Parent: scan/base.go

Complexity

Conditions

Size

Total Lines	60
Code Lines	41

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	18
eloc	41
dl	0
loc	60
rs	1.2
c	0
b	0
f	0
nop	3

How to fix Long Method 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/k0kubun/pp"
	"github.com/sirupsen/logrus"
)

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

	log  *logrus.Entry
	errs []error
}

//Command is for check dependence
type Command struct {
	Command string
	Name    string
}

func (l *base) scanWp() (err error) {
	if len(l.ServerInfo.WpPath) == 0 && len(l.ServerInfo.WpToken) == 0 {
		return nil
	}
	if len(l.ServerInfo.WpPath) == 0 {
		return fmt.Errorf("not found : WpPath")
	}
	if len(l.ServerInfo.WpToken) == 0 {
		return fmt.Errorf("not found : WpToken")
	}

	cmd := []Command{{Command: "wp cli", Name: "wp"}, {Command: "curl --help", Name: "curl"}}
	for _, i := range cmd {
		if r := exec(l.ServerInfo, i.Command, noSudo); !r.isSuccess() {
			return fmt.Errorf("%s command not installed", i.Name)
		}
	}

	var vinfos []models.VulnInfo
	if vinfos, err = detectWp(l); err != nil {
		l.log.Errorf("Failed to scan wordpress: %s", err)
		return err
	}
	l.WpVulnInfos = map[string]models.VulnInfo{}
	for _, i := range vinfos {
		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 *base) (vinfos []models.VulnInfo, err error) {
	var coreVulns []models.VulnInfo
	if coreVulns, err = detectWpCore(c); err != nil {
		return
	}
	vinfos = append(vinfos, coreVulns...)

	var themeVulns []models.VulnInfo
	if themeVulns, err = detectWpTheme(c); err != nil {
		return
	}
	vinfos = append(vinfos, themeVulns...)

	var pluginVulns []models.VulnInfo
	if pluginVulns, err = detectWpPlugin(c); err != nil {
		return
	}
	vinfos = append(vinfos, pluginVulns...)

	return
}

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

	var coreVersion string
	if r := exec(c.ServerInfo, 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.ServerInfo.WpToken, coreVersion)
	if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
		coreConvertVinfo(r.Stdout)
	}
	return
}

func coreConvertVinfo(stdout string) (vinfos []models.VulnInfo, err error) {
	data := map[string]WpCveInfos{}
	if err = json.Unmarshal([]byte(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
			}
			NotFixedYet := false
			if len(e.FixedIn) == 0 {
				NotFixedYet = true
			}
			var cveIDs []string
			for _, k := range e.References.Cve {
				cveIDs = append(cveIDs, "CVE-"+k)
			}

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

//WpStatus is for wp command
type WpStatus struct {
	Name    string `json:"name"`
	Status  string `json:"status"`
	Update  string `json:"update"`
	Version string `json:"version"`
}

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

	var themes []WpStatus
	if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
		if err = json.Unmarshal([]byte(r.Stdout), &themes); err != nil {
			return
		}
	}

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

		if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
			pp.Print(r.Stdout)
			pp.Print(contentConvertVinfo(c, r.Stdout, theme))
		}
	}
	return
}

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

	var plugins []WpStatus
	if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
		if err = json.Unmarshal([]byte(r.Stdout), &plugins); err != nil {
			return
		}
	}

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

		if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
			contentConvertVinfo(c, r.Stdout, plugin)
		}
	}
	return
}

func contentConvertVinfo(c *base, stdout string, content WpStatus) (vinfos []models.VulnInfo, err error) {
	data := map[string]WpCveInfos{}
	if err = json.Unmarshal([]byte(stdout), &data); err != nil {
		var jsonError WpCveInfos
		if err = json.Unmarshal([]byte(stdout), &jsonError); err != nil {
			return
		}
		c.log.Errorf("wordpress: %s not found", content.Name)
	}
	for _, i := range data {
		if len(i.Vulnerabilities) == 0 {
			continue
		}
		for _, e := range i.Vulnerabilities {
			if len(e.References.Cve) == 0 {
				continue
			}
			notFixedYet := false
			if len(e.FixedIn) == 0 {
				notFixedYet = true
			}
			if len(e.FixedIn) == 0 {
				e.FixedIn = "0"
			}
			var v1 *version.Version
			v1, err = version.NewVersion(content.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 {
					vinfos = append(vinfos, models.VulnInfo{
						CveID: cveID,
						CveContents: models.NewCveContents(
							models.CveContent{
								CveID: cveID,
								Title: e.Title,
							},
						),
						AffectedPackages: models.PackageStatuses{
							{
								NotFixedYet: notFixedYet,
							},
						},
					})
				}
			}
		}
	}
	return
}

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/k0kubun/pp"
33			"github.com/sirupsen/logrus"
34			)
35
36			type base struct {
37			ServerInfo config.ServerInfo
38			Distro config.Distro
39			Platform models.Platform
40			osPackages
41
42			log *logrus.Entry
43			errs []error
44			}
45
46			//Command is for check dependence
47			type Command struct {
48			Command string
49			Name string
50			}
51
52			func (l *base) scanWp() (err error) {
53			if len(l.ServerInfo.WpPath) == 0 && len(l.ServerInfo.WpToken) == 0 {
54			return nil
55			}
56			if len(l.ServerInfo.WpPath) == 0 {
57			return fmt.Errorf("not found : WpPath")
58			}
59			if len(l.ServerInfo.WpToken) == 0 {
60			return fmt.Errorf("not found : WpToken")
61			}
62
63			cmd := []Command{{Command: "wp cli", Name: "wp"}, {Command: "curl --help", Name: "curl"}}
64			for _, i := range cmd {
65			if r := exec(l.ServerInfo, i.Command, noSudo); !r.isSuccess() {
66			return fmt.Errorf("%s command not installed", i.Name)
67			}
68			}
69
70			var vinfos []models.VulnInfo
71			if vinfos, err = detectWp(l); err != nil {
72			l.log.Errorf("Failed to scan wordpress: %s", err)
73			return err
74			}
75			l.WpVulnInfos = map[string]models.VulnInfo{}
76			for _, i := range vinfos {
77			l.WpVulnInfos[i.CveID] = i
78			}
79
80			return
81			}
82
83			//WpCveInfos is for wpvulndb's json
84			type WpCveInfos struct {
85			ReleaseDate string `json:"release_date"`
86			ChangelogURL string `json:"changelog_url"`
87			Status string `json:"status"`
88			LatestVersion string `json:"latest_version"`
89			LastUpdated string `json:"last_updated"`
90			Popular bool `json:"popular"`
91			Vulnerabilities []WpCveInfo `json:"vulnerabilities"`
92			Error string `json:"error"`
93			}
94
95			//WpCveInfo is for wpvulndb's json
96			type WpCveInfo struct {
97			ID int `json:"id"`
98			Title string `json:"title"`
99			CreatedAt string `json:"created_at"`
100			UpdatedAt string `json:"updated_at"`
101			PublishedDate string `json:"published_date"`
102			VulnType string `json:"vuln_type"`
103			References References `json:"references"`
104			FixedIn string `json:"fixed_in"`
105			}
106
107			//References is for wpvulndb's json
108			type References struct {
109			URL []string `json:"url"`
110			Cve []string `json:"cve"`
111			Secunia []string `json:"secunia"`
112			}
113
114			func detectWp(c *base) (vinfos []models.VulnInfo, err error) {
115			var coreVulns []models.VulnInfo
116			if coreVulns, err = detectWpCore(c); err != nil {
117			return
118			}
119			vinfos = append(vinfos, coreVulns...)
120
121			var themeVulns []models.VulnInfo
122			if themeVulns, err = detectWpTheme(c); err != nil {
123			return
124			}
125			vinfos = append(vinfos, themeVulns...)
126
127			var pluginVulns []models.VulnInfo
128			if pluginVulns, err = detectWpPlugin(c); err != nil {
129			return
130			}
131			vinfos = append(vinfos, pluginVulns...)
132
133			return
134			}
135
136			func detectWpCore(c *base) (vinfos []models.VulnInfo, err error) {
137			cmd := fmt.Sprintf("wp core version --path=%s", c.ServerInfo.WpPath)
138
139			var coreVersion string
140			if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
141			tmp := strings.Split(r.Stdout, ".")
142			coreVersion = strings.Join(tmp, "")
143			coreVersion = strings.TrimRight(coreVersion, "\r\n")
144			if len(coreVersion) == 0 {
145			return
146			}
147			}
148			cmd = fmt.Sprintf("curl -k -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/wordpresses/%s", c.ServerInfo.WpToken, coreVersion)
149			if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
150			coreConvertVinfo(r.Stdout)
151			}
152			return
153			}
154
155			func coreConvertVinfo(stdout string) (vinfos []models.VulnInfo, err error) {
156			data := map[string]WpCveInfos{}
157			if err = json.Unmarshal([]byte(stdout), &data); err != nil {
158			return
159			}
160			for _, i := range data {
161			if len(i.Vulnerabilities) == 0 {
162			continue
163			}
164			for _, e := range i.Vulnerabilities {
165			if len(e.References.Cve) == 0 {
166			continue
167			}
168			NotFixedYet := false
169			if len(e.FixedIn) == 0 {
170			NotFixedYet = true
171			}
172			var cveIDs []string
173			for _, k := range e.References.Cve {
174			cveIDs = append(cveIDs, "CVE-"+k)
175			}
176
177			for _, cveID := range cveIDs {
178			vinfos = append(vinfos, models.VulnInfo{
179			CveID: cveID,
180			CveContents: models.NewCveContents(
181			models.CveContent{
182			CveID: cveID,
183			Title: e.Title,
184			},
185			),
186			AffectedPackages: models.PackageStatuses{
187			{
188			NotFixedYet: NotFixedYet,
189			},
190			},
191			})
192			}
193			}
194			}
195			return
196			}
197
198			//WpStatus is for wp command
199			type WpStatus struct {
200			Name string `json:"name"`
201			Status string `json:"status"`
202			Update string `json:"update"`
203			Version string `json:"version"`
204			}
205
206			func detectWpTheme(c *base) (vinfos []models.VulnInfo, err error) {
207			cmd := fmt.Sprintf("wp theme list --path=%s --format=json", c.ServerInfo.WpPath)
208
209			var themes []WpStatus
210			if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
211			if err = json.Unmarshal([]byte(r.Stdout), &themes); err != nil {
212			return
213			}
214			}
215
216			for _, theme := range themes {
217			cmd := fmt.Sprintf("curl -k -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/themes/%s", c.ServerInfo.WpToken, theme.Name)
218
219			if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
220			pp.Print(r.Stdout)
221			pp.Print(contentConvertVinfo(c, r.Stdout, theme))
222			}
223			}
224			return
225			}
226
227			func detectWpPlugin(c *base) (vinfos []models.VulnInfo, err error) {
228			cmd := fmt.Sprintf("wp plugin list --path=%s --format=json", c.ServerInfo.WpPath)
229
230			var plugins []WpStatus
231			if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
232			if err = json.Unmarshal([]byte(r.Stdout), &plugins); err != nil {
233			return
234			}
235			}
236
237			for _, plugin := range plugins {
238			cmd := fmt.Sprintf("curl -k -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/plugins/%s", c.ServerInfo.WpToken, plugin.Name)
239
240			if r := exec(c.ServerInfo, cmd, noSudo); r.isSuccess() {
241			contentConvertVinfo(c, r.Stdout, plugin)
242			}
243			}
244			return
245			}
246
247			func contentConvertVinfo(c *base, stdout string, content WpStatus) (vinfos []models.VulnInfo, err error) {
248			data := map[string]WpCveInfos{}
249			if err = json.Unmarshal([]byte(stdout), &data); err != nil {
250			var jsonError WpCveInfos
251			if err = json.Unmarshal([]byte(stdout), &jsonError); err != nil {
252			return
253			}
254			c.log.Errorf("wordpress: %s not found", content.Name)
255			}
256			for _, i := range data {
257			if len(i.Vulnerabilities) == 0 {
258			continue
259			}
260			for _, e := range i.Vulnerabilities {
261			if len(e.References.Cve) == 0 {
262			continue
263			}
264			notFixedYet := false
265			if len(e.FixedIn) == 0 {
266			notFixedYet = true
267			}
268			if len(e.FixedIn) == 0 {
269			e.FixedIn = "0"
270			}
271			var v1 *version.Version
272			v1, err = version.NewVersion(content.Version)
273			if err != nil {
274			return
275			}
276			var v2 *version.Version
277			v2, err = version.NewVersion(e.FixedIn)
278			if err != nil {
279			return
280			}
281			if v1.LessThan(v2) {
282			var cveIDs []string
283			for _, k := range e.References.Cve {
284			cveIDs = append(cveIDs, "CVE-"+k)
285			}
286
287			for _, cveID := range cveIDs {
288			vinfos = append(vinfos, models.VulnInfo{
289			CveID: cveID,
290			CveContents: models.NewCveContents(
291			models.CveContent{
292			CveID: cveID,
293			Title: e.Title,
294			},
295			),
296			AffectedPackages: models.PackageStatuses{
297			{
298			NotFixedYet: notFixedYet,
299			},
300			},
301			})
302			}
303			}
304			}
305			}
306			return
307			}
308
309			func (l *base) wpConvertToModel() models.VulnInfos {
310			return l.WpVulnInfos
311			}
312
313			func (l *base) exec(cmd string, sudo bool) execResult {
314			return exec(l.ServerInfo, cmd, sudo, l.log)
315			}
316
317			func (l *base) setServerInfo(c config.ServerInfo) {
318			l.ServerInfo = c
319			}
320
321			func (l *base) getServerInfo() config.ServerInfo {
322			return l.ServerInfo
323			}
324
325			func (l *base) setDistro(fam, rel string) {
326			d := config.Distro{
327			Family: fam,
328			Release: rel,
329			}
330			l.Distro = d
331
332			s := l.getServerInfo()
333			s.Distro = d
334			l.setServerInfo(s)
335			}
336
337			func (l *base) getDistro() config.Distro {
338			return l.Distro
339			}
340
341			func (l *base) setPlatform(p models.Platform) {
342			l.Platform = p
343			}
344
345			func (l *base) getPlatform() models.Platform {
346			return l.Platform
347			}
348
349			func (l *base) runningKernel() (release, version string, err error) {
350			r := l.exec("uname -r", noSudo)
351			if !r.isSuccess() {
352			return "", "", fmt.Errorf("Failed to SSH: %s", r)
353			}
354			release = strings.TrimSpace(r.Stdout)
355
356			switch l.Distro.Family {
357			case config.Debian:
358			r := l.exec("uname -a", noSudo)
359			if !r.isSuccess() {
360			return "", "", fmt.Errorf("Failed to SSH: %s", r)
361			}
362			ss := strings.Fields(r.Stdout)
363			if 6 < len(ss) {
364			version = ss[6]
365			}
366			}
367			return
368			}
369
370			func (l *base) allContainers() (containers []config.Container, err error) {
371			switch l.ServerInfo.ContainerType {
372			case "", "docker":
373			stdout, err := l.dockerPs("-a --format '{{.ID}} {{.Names}} {{.Image}}'")
374			if err != nil {
375			return containers, err
376			}
377			return l.parseDockerPs(stdout)
378			case "lxd":
379			stdout, err := l.lxdPs("-c n")
380			if err != nil {
381			return containers, err
382			}
383			return l.parseLxdPs(stdout)
384			case "lxc":
385			stdout, err := l.lxcPs("-1")
386			if err != nil {
387			return containers, err
388			}
389			return l.parseLxcPs(stdout)
390			default:
391			return containers, fmt.Errorf(
392			"Not supported yet: %s", l.ServerInfo.ContainerType)
393			}
394			}
395
396			func (l *base) runningContainers() (containers []config.Container, err error) {
397			switch l.ServerInfo.ContainerType {
398			case "", "docker":
399			stdout, err := l.dockerPs("--format '{{.ID}} {{.Names}} {{.Image}}'")
400			if err != nil {
401			return containers, err
402			}
403			return l.parseDockerPs(stdout)
404			case "lxd":
405			stdout, err := l.lxdPs("volatile.last_state.power=RUNNING -c n")
406			if err != nil {
407			return containers, err
408			}
409			return l.parseLxdPs(stdout)
410			case "lxc":
411			stdout, err := l.lxcPs("-1 --running")
412			if err != nil {
413			return containers, err
414			}
415			return l.parseLxcPs(stdout)
416			default:
417			return containers, fmt.Errorf(
418			"Not supported yet: %s", l.ServerInfo.ContainerType)
419			}
420			}
421
422			func (l *base) exitedContainers() (containers []config.Container, err error) {
423			switch l.ServerInfo.ContainerType {
424			case "", "docker":
425			stdout, err := l.dockerPs("--filter 'status=exited' --format '{{.ID}} {{.Names}} {{.Image}}'")
426			if err != nil {
427			return containers, err
428			}
429			return l.parseDockerPs(stdout)
430			case "lxd":
431			stdout, err := l.lxdPs("volatile.last_state.power=STOPPED -c n")
432			if err != nil {
433			return containers, err
434			}
435			return l.parseLxdPs(stdout)
436			case "lxc":
437			stdout, err := l.lxcPs("-1 --stopped")
438			if err != nil {
439			return containers, err
440			}
441			return l.parseLxcPs(stdout)
442			default:
443			return containers, fmt.Errorf(
444			"Not supported yet: %s", l.ServerInfo.ContainerType)
445			}
446			}
447
448			func (l *base) dockerPs(option string) (string, error) {
449			cmd := fmt.Sprintf("docker ps %s", option)
450			r := l.exec(cmd, noSudo)
451			if !r.isSuccess() {
452			return "", fmt.Errorf("Failed to SSH: %s", r)
453			}
454			return r.Stdout, nil
455			}
456
457			func (l *base) lxdPs(option string) (string, error) {
458			cmd := fmt.Sprintf("lxc list %s", option)
459			r := l.exec(cmd, noSudo)
460			if !r.isSuccess() {
461			return "", fmt.Errorf("failed to SSH: %s", r)
462			}
463			return r.Stdout, nil
464			}
465
466			func (l *base) lxcPs(option string) (string, error) {
467			cmd := fmt.Sprintf("lxc-ls %s 2>/dev/null", option)
468			r := l.exec(cmd, sudo)
469			if !r.isSuccess() {
470			return "", fmt.Errorf("failed to SSH: %s", r)
471			}
472			return r.Stdout, nil
473			}
474
475			func (l *base) parseDockerPs(stdout string) (containers []config.Container, err error) {
476			lines := strings.Split(stdout, "\n")
477			for _, line := range lines {
478			fields := strings.Fields(line)
479			if len(fields) == 0 {
480			break
481			}
482			if len(fields) != 3 {
483			return containers, fmt.Errorf("Unknown format: %s", line)
484			}
485			containers = append(containers, config.Container{
486			ContainerID: fields[0],
487			Name: fields[1],
488			Image: fields[2],
489			})
490			}
491			return
492			}
493
494			func (l *base) parseLxdPs(stdout string) (containers []config.Container, err error) {
495			lines := strings.Split(stdout, "\n")
496			for i, line := range lines[3:] {
497			if i%2 == 1 {
498			continue
499			}
500			fields := strings.Fields(strings.Replace(line, "\|", " ", -1))
501			if len(fields) == 0 {
502			break
503			}
504			if len(fields) != 1 {
505			return containers, fmt.Errorf("Unknown format: %s", line)
506			}
507			containers = append(containers, config.Container{
508			ContainerID: fields[0],
509			Name: fields[0],
510			})
511			}
512			return
513			}
514
515			func (l *base) parseLxcPs(stdout string) (containers []config.Container, err error) {
516			lines := strings.Split(stdout, "\n")
517			for _, line := range lines {
518			fields := strings.Fields(line)
519			if len(fields) == 0 {
520			break
521			}
522			containers = append(containers, config.Container{
523			ContainerID: fields[0],
524			Name: fields[0],
525			})
526			}
527			return
528			}
529
530			// ip executes ip command and returns IP addresses
531			func (l *base) ip() ([]string, []string, error) {
532			// e.g.
533			// 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
534			// 2: eth0 inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
535			// 2: eth0 inet6 fe80::5054:ff:fe2a:864c/64 scope link \ valid_lft forever preferred_lft forever
536			r := l.exec("/sbin/ip -o addr", noSudo)
537			if !r.isSuccess() {
538			return nil, nil, fmt.Errorf("Failed to detect IP address: %v", r)
539			}
540			ipv4Addrs, ipv6Addrs := l.parseIP(r.Stdout)
541			return ipv4Addrs, ipv6Addrs, nil
542			}
543
544			// parseIP parses the results of ip command
545			func (l *base) parseIP(stdout string) (ipv4Addrs []string, ipv6Addrs []string) {
546			lines := strings.Split(stdout, "\n")
547			for _, line := range lines {
548			fields := strings.Fields(line)
549			if len(fields) < 4 {
550			continue
551			}
552			ip, _, err := net.ParseCIDR(fields[3])
553			if err != nil {
554			continue
555			}
556			if !ip.IsGlobalUnicast() {
557			continue
558			}
559			if ipv4 := ip.To4(); ipv4 != nil {
560			ipv4Addrs = append(ipv4Addrs, ipv4.String())
561			} else {
562			ipv6Addrs = append(ipv6Addrs, ip.String())
563			}
564			}
565			return
566			}
567
568			func (l *base) detectPlatform() {
569			if l.getServerInfo().Mode.IsOffline() {
570			l.setPlatform(models.Platform{Name: "unknown"})
571			return
572			}
573			ok, instanceID, err := l.detectRunningOnAws()
574			if err != nil {
575			l.setPlatform(models.Platform{Name: "other"})
576			return
577			}
578			if ok {
579			l.setPlatform(models.Platform{
580			Name: "aws",
581			InstanceID: instanceID,
582			})
583			return
584			}
585
586			//TODO Azure, GCP...
587			l.setPlatform(models.Platform{Name: "other"})
588			return
589			}
590
591			func (l *base) detectRunningOnAws() (ok bool, instanceID string, err error) {
592			if r := l.exec("type curl", noSudo); r.isSuccess() {
593			cmd := "curl --max-time 1 --noproxy 169.254.169.254 http://169.254.169.254/latest/meta-data/instance-id"
594			r := l.exec(cmd, noSudo)
595			if r.isSuccess() {
596			id := strings.TrimSpace(r.Stdout)
597			if !l.isAwsInstanceID(id) {
598			return false, "", nil
599			}
600			return true, id, nil
601			}
602
603			switch r.ExitStatus {
604			case 28, 7:
605			// Not running on AWS
606			// 7 Failed to connect to host.
607			// 28 operation timeout.
608			return false, "", nil
609			}
610			}
611
612			if r := l.exec("type wget", noSudo); r.isSuccess() {
613			cmd := "wget --tries=3 --timeout=1 --no-proxy -q -O - http://169.254.169.254/latest/meta-data/instance-id"
614			r := l.exec(cmd, noSudo)
615			if r.isSuccess() {
616			id := strings.TrimSpace(r.Stdout)
617			if !l.isAwsInstanceID(id) {
618			return false, "", nil
619			}
620			return true, id, nil
621			}
622
623			switch r.ExitStatus {
624			case 4, 8:
625			// Not running on AWS
626			// 4 Network failure
627			// 8 Server issued an error response.
628			return false, "", nil
629			}
630			}
631			return false, "", fmt.Errorf(
632			"Failed to curl or wget to AWS instance metadata on %s. container: %s",
633			l.ServerInfo.ServerName, l.ServerInfo.Container.Name)
634			}
635
636			// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
637			var awsInstanceIDPattern = regexp.MustCompile(`^i-[0-9a-f]+$`)
638
639			func (l *base) isAwsInstanceID(str string) bool {
640			return awsInstanceIDPattern.MatchString(str)
641			}
642
643			func (l *base) convertToModel() models.ScanResult {
644			ctype := l.ServerInfo.ContainerType
645			if l.ServerInfo.Container.ContainerID != "" && ctype == "" {
646			ctype = "docker"
647			}
648			container := models.Container{
649			ContainerID: l.ServerInfo.Container.ContainerID,
650			Name: l.ServerInfo.Container.Name,
651			Image: l.ServerInfo.Container.Image,
652			Type: ctype,
653			}
654
655			errs := []string{}
656			for _, e := range l.errs {
657			errs = append(errs, fmt.Sprintf("%s", e))
658			}
659
660			return models.ScanResult{
661			JSONVersion: models.JSONVersion,
662			ServerName: l.ServerInfo.ServerName,
663			ScannedAt: time.Now(),
664			ScanMode: l.ServerInfo.Mode.String(),
665			Family: l.Distro.Family,
666			Release: l.Distro.Release,
667			Container: container,
668			Platform: l.Platform,
669			IPv4Addrs: l.ServerInfo.IPv4Addrs,
670			IPv6Addrs: l.ServerInfo.IPv6Addrs,
671			ScannedCves: l.VulnInfos,
672			RunningKernel: l.Kernel,
673			Packages: l.Packages,
674			SrcPackages: l.SrcPackages,
675			Optional: l.ServerInfo.Optional,
676			Errors: errs,
677			}
678			}
679
680			func (l *base) setErrs(errs []error) {
681			l.errs = errs
682			}
683
684			func (l *base) getErrs() []error {
685			return l.errs
686			}
687
688			const (
689			systemd = "systemd"
690			upstart = "upstart"
691			sysVinit = "init"
692			)
693
694			// https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
695			func (l *base) detectInitSystem() (string, error) {
696			var f func(string) (string, error)
697			f = func(cmd string) (string, error) {
698			r := l.exec(cmd, sudo)
699			if !r.isSuccess() {
700			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
701			}
702			scanner := bufio.NewScanner(strings.NewReader(r.Stdout))
703			scanner.Scan()
704			line := strings.TrimSpace(scanner.Text())
705			if strings.Contains(line, "systemd") {
706			return systemd, nil
707			} else if strings.Contains(line, "upstart") {
708			return upstart, nil
709			} else if strings.Contains(line, "File: ‘/proc/1/exe’ -> ‘/sbin/init’") \|\|
710			strings.Contains(line, "File: `/proc/1/exe' -> `/sbin/init'") {
711			return f("stat /sbin/init")
712			} else if line == "File: ‘/sbin/init’" \|\|
713			line == "File: `/sbin/init'" {
714			r := l.exec("/sbin/init --version", noSudo)
715			if r.isSuccess() {
716			if strings.Contains(r.Stdout, "upstart") {
717			return upstart, nil
718			}
719			}
720			return sysVinit, nil
721			}
722			return "", fmt.Errorf("Failed to detect a init system: %s", line)
723			}
724			return f("stat /proc/1/exe")
725			}
726
727			func (l *base) detectServiceName(pid string) (string, error) {
728			cmd := fmt.Sprintf("systemctl status --quiet --no-pager %s", pid)
729			r := l.exec(cmd, noSudo)
730			if !r.isSuccess() {
731			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
732			}
733			return l.parseSystemctlStatus(r.Stdout), nil
734			}
735
736			func (l *base) parseSystemctlStatus(stdout string) string {
737			scanner := bufio.NewScanner(strings.NewReader(stdout))
738			scanner.Scan()
739			line := scanner.Text()
740			ss := strings.Fields(line)
741			if len(ss) < 2 \|\| strings.HasPrefix(line, "Failed to get unit for PID") {
742			return ""
743			}
744			return ss[1]
745			}
746

future-architect / vuls

Pull Request — master (#769)

scan.contentConvertVinfo F

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How to fix Long Method Complexity

Long Method

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