scan.*base.getServerInfo - 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 16:39 UTC

scan.*base.getServerInfo A

↳ Parent: scan/base.go

Complexity

Conditions

Size

Total Lines	2
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	2
dl	0
loc	2
rs	10
c	0
b	0
f	0
nop	0

/* 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")
	}

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

	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() {
		coreConvertVinfos(r.Stdout)
	}
	return
}

func coreConvertVinfos(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 _, vulnerability := range i.Vulnerabilities {
			if len(vulnerability.References.Cve) == 0 {
				continue
			}
			NotFixedYet := false
			if len(vulnerability.FixedIn) == 0 {
				NotFixedYet = true
			}
			var cveIDs []string
			for _, cveNumber := range vulnerability.References.Cve {
				cveIDs = append(cveIDs, "CVE-"+cveNumber)
			}

			for _, cveID := range cveIDs {
				vinfos = append(vinfos, models.VulnInfo{
					CveID: cveID,
					CveContents: models.NewCveContents(
						models.CveContent{
							CveID: cveID,
							Title: vulnerability.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() {
			contentConvertVinfos(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() {
			contentConvertVinfos(c, r.Stdout, plugin)
		}
	}
	return
}

func contentConvertVinfos(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 _, vulnerability := range i.Vulnerabilities {
			if len(vulnerability.References.Cve) == 0 {
				continue
			}
			notFixedYet := false
			if len(vulnerability.FixedIn) == 0 {
				notFixedYet = true
			}
			if len(vulnerability.FixedIn) == 0 {
				vulnerability.FixedIn = "0"
			}
			var v1 *version.Version
			v1, err = version.NewVersion(content.Version)
			if err != nil {
				return
			}
			var v2 *version.Version
			v2, err = version.NewVersion(vulnerability.FixedIn)
			if err != nil {
				return
			}
			if v1.LessThan(v2) {
				var cveIDs []string
				for _, cveNumber := range vulnerability.References.Cve {
					cveIDs = append(cveIDs, "CVE-"+cveNumber)
				}

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

future-architect / vuls

Pull Request — master (#769)

scan.*base.getServerInfo A

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