scan.*base.detectServiceName - Code Metrics - Inspection of "[WIP]fix(scan): enable to report if some warnings..." - future-architect/vuls - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#805)

by kota

created 2019-05-14 06:34 UTC

scan.*base.detectServiceName A

↳ Parent: scan/base.go

Complexity

Conditions

Size

Total Lines	7
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	2
eloc	6
dl	0
loc	7
rs	10
c	0
b	0
f	0
nop	1

/* 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/sirupsen/logrus"
	"golang.org/x/xerrors"
)

type base struct {
	ServerInfo config.ServerInfo
	Distro     config.Distro
	Platform   models.Platform
	osPackages
	WordPress *models.WordPressPackages

	log   *logrus.Entry
	errs  []error
	warns []error
}

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 "", "", xerrors.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 "", "", xerrors.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, xerrors.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, xerrors.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, xerrors.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 "", xerrors.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 "", xerrors.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 "", xerrors.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, xerrors.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, xerrors.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, xerrors.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, "", xerrors.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, warns := []string{}, []string{}
	for _, e := range l.errs {
		errs = append(errs, fmt.Sprintf("%+v", e))
	}
	for _, w := range l.warns {
		warns = append(warns, fmt.Sprintf("%+v", w))
	}

	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,
		WordPressPackages: l.WordPress,
		Optional:          l.ServerInfo.Optional,
		Errors:            errs,
		Warnings:          warns,
	}
}

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 "", xerrors.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 "", xerrors.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 "", xerrors.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]
}

func (l *base) scanWordPress() (err error) {
	wpOpts := []string{l.ServerInfo.WordPress.OSUser,
		l.ServerInfo.WordPress.DocRoot,
		l.ServerInfo.WordPress.CmdPath,
		l.ServerInfo.WordPress.WPVulnDBToken,
	}
	var isScanWp, hasEmptyOpt bool
	for _, opt := range wpOpts {
		if opt != "" {
			isScanWp = true
			break
		} else {
			hasEmptyOpt = true
		}
	}
	if !isScanWp {
		return nil
	}

	if hasEmptyOpt {
		return xerrors.Errorf("%s has empty WordPress opts: %s",
			l.getServerInfo().GetServerName(), wpOpts)
	}

	cmd := fmt.Sprintf("sudo -u %s -i -- %s cli version",
		l.ServerInfo.WordPress.OSUser,
		l.ServerInfo.WordPress.CmdPath)
	if r := exec(l.ServerInfo, cmd, noSudo); !r.isSuccess() {
		l.ServerInfo.WordPress.WPVulnDBToken = "secret"
		return xerrors.Errorf("Failed to exec `%s`. Check the OS user, command path of wp-cli, DocRoot and permission: %#v", cmd, l.ServerInfo.WordPress)
	}

	wp, err := l.detectWordPress()
	if err != nil {
		return xerrors.Errorf("Failed to scan wordpress: %w", err)

	}
	l.WordPress = wp
	return nil
}

func (l *base) detectWordPress() (*models.WordPressPackages, error) {
	ver, err := l.detectWpCore()
	if err != nil {
		return nil, err
	}

	themes, err := l.detectWpThemes()
	if err != nil {
		return nil, err
	}

	plugins, err := l.detectWpPlugins()
	if err != nil {
		return nil, err
	}

	pkgs := models.WordPressPackages{
		models.WpPackage{
			Name:    models.WPCore,
			Version: ver,
			Type:    models.WPCore,
		},
	}
	pkgs = append(pkgs, themes...)
	pkgs = append(pkgs, plugins...)
	return &pkgs, nil
}

func (l *base) detectWpCore() (string, error) {
	cmd := fmt.Sprintf("sudo -u %s -i -- %s core version --path=%s",
		l.ServerInfo.WordPress.OSUser,
		l.ServerInfo.WordPress.CmdPath,
		l.ServerInfo.WordPress.DocRoot)

	r := exec(l.ServerInfo, cmd, noSudo)
	if !r.isSuccess() {
		return "", xerrors.Errorf("Failed to get wp core version: %s", r)
	}
	return strings.TrimSpace(r.Stdout), nil
}

func (l *base) detectWpThemes() ([]models.WpPackage, error) {
	cmd := fmt.Sprintf("sudo -u %s -i -- %s theme list --path=%s --format=json",
		l.ServerInfo.WordPress.OSUser,
		l.ServerInfo.WordPress.CmdPath,
		l.ServerInfo.WordPress.DocRoot)

	var themes []models.WpPackage
	r := exec(l.ServerInfo, cmd, noSudo)
	if !r.isSuccess() {
		return nil, xerrors.Errorf("Failed to get a list of WordPress plugins: %s", r)
	}
	err := json.Unmarshal([]byte(r.Stdout), &themes)
	if err != nil {
		return nil, xerrors.Errorf("Failed to unmarshal wp theme list: %w", cmd, err)

	}
	for i := range themes {
		themes[i].Type = models.WPTheme
	}
	return themes, nil
}

func (l *base) detectWpPlugins() ([]models.WpPackage, error) {
	cmd := fmt.Sprintf("sudo -u %s -i -- %s plugin list --path=%s --format=json",
		l.ServerInfo.WordPress.OSUser,
		l.ServerInfo.WordPress.CmdPath,
		l.ServerInfo.WordPress.DocRoot)

	var plugins []models.WpPackage
	r := exec(l.ServerInfo, cmd, noSudo)
	if !r.isSuccess() {
		return nil, xerrors.Errorf("Failed to wp plugin list: %s", r)
	}
	if err := json.Unmarshal([]byte(r.Stdout), &plugins); err != nil {
		return nil, err
	}
	for i := range plugins {
		plugins[i].Type = models.WPPlugin
	}
	return plugins, nil
}


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/sirupsen/logrus"
32			"golang.org/x/xerrors"
33			)
34
35			type base struct {
36			ServerInfo config.ServerInfo
37			Distro config.Distro
38			Platform models.Platform
39			osPackages
40			WordPress *models.WordPressPackages
41
42			log *logrus.Entry
43			errs []error
44			warns []error
45			}
46
47			func (l *base) exec(cmd string, sudo bool) execResult {
48			return exec(l.ServerInfo, cmd, sudo, l.log)
49			}
50
51			func (l *base) setServerInfo(c config.ServerInfo) {
52			l.ServerInfo = c
53			}
54
55			func (l *base) getServerInfo() config.ServerInfo {
56			return l.ServerInfo
57			}
58
59			func (l *base) setDistro(fam, rel string) {
60			d := config.Distro{
61			Family: fam,
62			Release: rel,
63			}
64			l.Distro = d
65
66			s := l.getServerInfo()
67			s.Distro = d
68			l.setServerInfo(s)
69			}
70
71			func (l *base) getDistro() config.Distro {
72			return l.Distro
73			}
74
75			func (l *base) setPlatform(p models.Platform) {
76			l.Platform = p
77			}
78
79			func (l *base) getPlatform() models.Platform {
80			return l.Platform
81			}
82
83			func (l *base) runningKernel() (release, version string, err error) {
84			r := l.exec("uname -r", noSudo)
85			if !r.isSuccess() {
86			return "", "", xerrors.Errorf("Failed to SSH: %s", r)
87			}
88			release = strings.TrimSpace(r.Stdout)
89
90			switch l.Distro.Family {
91			case config.Debian:
92			r := l.exec("uname -a", noSudo)
93			if !r.isSuccess() {
94			return "", "", xerrors.Errorf("Failed to SSH: %s", r)
95			}
96			ss := strings.Fields(r.Stdout)
97			if 6 < len(ss) {
98			version = ss[6]
99			}
100			}
101			return
102			}
103
104			func (l *base) allContainers() (containers []config.Container, err error) {
105			switch l.ServerInfo.ContainerType {
106			case "", "docker":
107			stdout, err := l.dockerPs("-a --format '{{.ID}} {{.Names}} {{.Image}}'")
108			if err != nil {
109			return containers, err
110			}
111			return l.parseDockerPs(stdout)
112			case "lxd":
113			stdout, err := l.lxdPs("-c n")
114			if err != nil {
115			return containers, err
116			}
117			return l.parseLxdPs(stdout)
118			case "lxc":
119			stdout, err := l.lxcPs("-1")
120			if err != nil {
121			return containers, err
122			}
123			return l.parseLxcPs(stdout)
124			default:
125			return containers, xerrors.Errorf(
126			"Not supported yet: %s", l.ServerInfo.ContainerType)
127			}
128			}
129
130			func (l *base) runningContainers() (containers []config.Container, err error) {
131			switch l.ServerInfo.ContainerType {
132			case "", "docker":
133			stdout, err := l.dockerPs("--format '{{.ID}} {{.Names}} {{.Image}}'")
134			if err != nil {
135			return containers, err
136			}
137			return l.parseDockerPs(stdout)
138			case "lxd":
139			stdout, err := l.lxdPs("volatile.last_state.power=RUNNING -c n")
140			if err != nil {
141			return containers, err
142			}
143			return l.parseLxdPs(stdout)
144			case "lxc":
145			stdout, err := l.lxcPs("-1 --running")
146			if err != nil {
147			return containers, err
148			}
149			return l.parseLxcPs(stdout)
150			default:
151			return containers, xerrors.Errorf(
152			"Not supported yet: %s", l.ServerInfo.ContainerType)
153			}
154			}
155
156			func (l *base) exitedContainers() (containers []config.Container, err error) {
157			switch l.ServerInfo.ContainerType {
158			case "", "docker":
159			stdout, err := l.dockerPs("--filter 'status=exited' --format '{{.ID}} {{.Names}} {{.Image}}'")
160			if err != nil {
161			return containers, err
162			}
163			return l.parseDockerPs(stdout)
164			case "lxd":
165			stdout, err := l.lxdPs("volatile.last_state.power=STOPPED -c n")
166			if err != nil {
167			return containers, err
168			}
169			return l.parseLxdPs(stdout)
170			case "lxc":
171			stdout, err := l.lxcPs("-1 --stopped")
172			if err != nil {
173			return containers, err
174			}
175			return l.parseLxcPs(stdout)
176			default:
177			return containers, xerrors.Errorf(
178			"Not supported yet: %s", l.ServerInfo.ContainerType)
179			}
180			}
181
182			func (l *base) dockerPs(option string) (string, error) {
183			cmd := fmt.Sprintf("docker ps %s", option)
184			r := l.exec(cmd, noSudo)
185			if !r.isSuccess() {
186			return "", xerrors.Errorf("Failed to SSH: %s", r)
187			}
188			return r.Stdout, nil
189			}
190
191			func (l *base) lxdPs(option string) (string, error) {
192			cmd := fmt.Sprintf("lxc list %s", option)
193			r := l.exec(cmd, noSudo)
194			if !r.isSuccess() {
195			return "", xerrors.Errorf("failed to SSH: %s", r)
196			}
197			return r.Stdout, nil
198			}
199
200			func (l *base) lxcPs(option string) (string, error) {
201			cmd := fmt.Sprintf("lxc-ls %s 2>/dev/null", option)
202			r := l.exec(cmd, sudo)
203			if !r.isSuccess() {
204			return "", xerrors.Errorf("failed to SSH: %s", r)
205			}
206			return r.Stdout, nil
207			}
208
209			func (l *base) parseDockerPs(stdout string) (containers []config.Container, err error) {
210			lines := strings.Split(stdout, "\n")
211			for _, line := range lines {
212			fields := strings.Fields(line)
213			if len(fields) == 0 {
214			break
215			}
216			if len(fields) != 3 {
217			return containers, xerrors.Errorf("Unknown format: %s", line)
218			}
219			containers = append(containers, config.Container{
220			ContainerID: fields[0],
221			Name: fields[1],
222			Image: fields[2],
223			})
224			}
225			return
226			}
227
228			func (l *base) parseLxdPs(stdout string) (containers []config.Container, err error) {
229			lines := strings.Split(stdout, "\n")
230			for i, line := range lines[3:] {
231			if i%2 == 1 {
232			continue
233			}
234			fields := strings.Fields(strings.Replace(line, "\|", " ", -1))
235			if len(fields) == 0 {
236			break
237			}
238			if len(fields) != 1 {
239			return containers, xerrors.Errorf("Unknown format: %s", line)
240			}
241			containers = append(containers, config.Container{
242			ContainerID: fields[0],
243			Name: fields[0],
244			})
245			}
246			return
247			}
248
249			func (l *base) parseLxcPs(stdout string) (containers []config.Container, err error) {
250			lines := strings.Split(stdout, "\n")
251			for _, line := range lines {
252			fields := strings.Fields(line)
253			if len(fields) == 0 {
254			break
255			}
256			containers = append(containers, config.Container{
257			ContainerID: fields[0],
258			Name: fields[0],
259			})
260			}
261			return
262			}
263
264			// ip executes ip command and returns IP addresses
265			func (l *base) ip() ([]string, []string, error) {
266			// e.g.
267			// 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
268			// 2: eth0 inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
269			// 2: eth0 inet6 fe80::5054:ff:fe2a:864c/64 scope link \ valid_lft forever preferred_lft forever
270			r := l.exec("/sbin/ip -o addr", noSudo)
271			if !r.isSuccess() {
272			return nil, nil, xerrors.Errorf("Failed to detect IP address: %v", r)
273			}
274			ipv4Addrs, ipv6Addrs := l.parseIP(r.Stdout)
275			return ipv4Addrs, ipv6Addrs, nil
276			}
277
278			// parseIP parses the results of ip command
279			func (l *base) parseIP(stdout string) (ipv4Addrs []string, ipv6Addrs []string) {
280			lines := strings.Split(stdout, "\n")
281			for _, line := range lines {
282			fields := strings.Fields(line)
283			if len(fields) < 4 {
284			continue
285			}
286			ip, _, err := net.ParseCIDR(fields[3])
287			if err != nil {
288			continue
289			}
290			if !ip.IsGlobalUnicast() {
291			continue
292			}
293			if ipv4 := ip.To4(); ipv4 != nil {
294			ipv4Addrs = append(ipv4Addrs, ipv4.String())
295			} else {
296			ipv6Addrs = append(ipv6Addrs, ip.String())
297			}
298			}
299			return
300			}
301
302			func (l *base) detectPlatform() {
303			if l.getServerInfo().Mode.IsOffline() {
304			l.setPlatform(models.Platform{Name: "unknown"})
305			return
306			}
307			ok, instanceID, err := l.detectRunningOnAws()
308			if err != nil {
309			l.setPlatform(models.Platform{Name: "other"})
310			return
311			}
312			if ok {
313			l.setPlatform(models.Platform{
314			Name: "aws",
315			InstanceID: instanceID,
316			})
317			return
318			}
319
320			//TODO Azure, GCP...
321			l.setPlatform(models.Platform{Name: "other"})
322			return
323			}
324
325			func (l *base) detectRunningOnAws() (ok bool, instanceID string, err error) {
326			if r := l.exec("type curl", noSudo); r.isSuccess() {
327			cmd := "curl --max-time 1 --noproxy 169.254.169.254 http://169.254.169.254/latest/meta-data/instance-id"
328			r := l.exec(cmd, noSudo)
329			if r.isSuccess() {
330			id := strings.TrimSpace(r.Stdout)
331			if !l.isAwsInstanceID(id) {
332			return false, "", nil
333			}
334			return true, id, nil
335			}
336
337			switch r.ExitStatus {
338			case 28, 7:
339			// Not running on AWS
340			// 7 Failed to connect to host.
341			// 28 operation timeout.
342			return false, "", nil
343			}
344			}
345
346			if r := l.exec("type wget", noSudo); r.isSuccess() {
347			cmd := "wget --tries=3 --timeout=1 --no-proxy -q -O - http://169.254.169.254/latest/meta-data/instance-id"
348			r := l.exec(cmd, noSudo)
349			if r.isSuccess() {
350			id := strings.TrimSpace(r.Stdout)
351			if !l.isAwsInstanceID(id) {
352			return false, "", nil
353			}
354			return true, id, nil
355			}
356
357			switch r.ExitStatus {
358			case 4, 8:
359			// Not running on AWS
360			// 4 Network failure
361			// 8 Server issued an error response.
362			return false, "", nil
363			}
364			}
365			return false, "", xerrors.Errorf(
366			"Failed to curl or wget to AWS instance metadata on %s. container: %s",
367			l.ServerInfo.ServerName, l.ServerInfo.Container.Name)
368			}
369
370			// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
371			var awsInstanceIDPattern = regexp.MustCompile(`^i-[0-9a-f]+$`)
372
373			func (l *base) isAwsInstanceID(str string) bool {
374			return awsInstanceIDPattern.MatchString(str)
375			}
376
377			func (l *base) convertToModel() models.ScanResult {
378			ctype := l.ServerInfo.ContainerType
379			if l.ServerInfo.Container.ContainerID != "" && ctype == "" {
380			ctype = "docker"
381			}
382			container := models.Container{
383			ContainerID: l.ServerInfo.Container.ContainerID,
384			Name: l.ServerInfo.Container.Name,
385			Image: l.ServerInfo.Container.Image,
386			Type: ctype,
387			}
388
389			errs, warns := []string{}, []string{}
390			for _, e := range l.errs {
391			errs = append(errs, fmt.Sprintf("%+v", e))
392			}
393			for _, w := range l.warns {
394			warns = append(warns, fmt.Sprintf("%+v", w))
395			}
396
397			return models.ScanResult{
398			JSONVersion: models.JSONVersion,
399			ServerName: l.ServerInfo.ServerName,
400			ScannedAt: time.Now(),
401			ScanMode: l.ServerInfo.Mode.String(),
402			Family: l.Distro.Family,
403			Release: l.Distro.Release,
404			Container: container,
405			Platform: l.Platform,
406			IPv4Addrs: l.ServerInfo.IPv4Addrs,
407			IPv6Addrs: l.ServerInfo.IPv6Addrs,
408			ScannedCves: l.VulnInfos,
409			RunningKernel: l.Kernel,
410			Packages: l.Packages,
411			SrcPackages: l.SrcPackages,
412			WordPressPackages: l.WordPress,
413			Optional: l.ServerInfo.Optional,
414			Errors: errs,
415			Warnings: warns,
416			}
417			}
418
419			func (l *base) setErrs(errs []error) {
420			l.errs = errs
421			}
422
423			func (l *base) getErrs() []error {
424			return l.errs
425			}
426
427			const (
428			systemd = "systemd"
429			upstart = "upstart"
430			sysVinit = "init"
431			)
432
433			// https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
434			func (l *base) detectInitSystem() (string, error) {
435			var f func(string) (string, error)
436			f = func(cmd string) (string, error) {
437			r := l.exec(cmd, sudo)
438			if !r.isSuccess() {
439			return "", xerrors.Errorf("Failed to stat %s: %s", cmd, r)
440			}
441			scanner := bufio.NewScanner(strings.NewReader(r.Stdout))
442			scanner.Scan()
443			line := strings.TrimSpace(scanner.Text())
444			if strings.Contains(line, "systemd") {
445			return systemd, nil
446			} else if strings.Contains(line, "upstart") {
447			return upstart, nil
448			} else if strings.Contains(line, "File: ‘/proc/1/exe’ -> ‘/sbin/init’") \|\|
449			strings.Contains(line, "File: `/proc/1/exe' -> `/sbin/init'") {
450			return f("stat /sbin/init")
451			} else if line == "File: ‘/sbin/init’" \|\|
452			line == "File: `/sbin/init'" {
453			r := l.exec("/sbin/init --version", noSudo)
454			if r.isSuccess() {
455			if strings.Contains(r.Stdout, "upstart") {
456			return upstart, nil
457			}
458			}
459			return sysVinit, nil
460			}
461			return "", xerrors.Errorf("Failed to detect a init system: %s", line)
462			}
463			return f("stat /proc/1/exe")
464			}
465
466			func (l *base) detectServiceName(pid string) (string, error) {
467			cmd := fmt.Sprintf("systemctl status --quiet --no-pager %s", pid)
468			r := l.exec(cmd, noSudo)
469			if !r.isSuccess() {
470			return "", xerrors.Errorf("Failed to stat %s: %s", cmd, r)
471			}
472			return l.parseSystemctlStatus(r.Stdout), nil
473			}
474
475			func (l *base) parseSystemctlStatus(stdout string) string {
476			scanner := bufio.NewScanner(strings.NewReader(stdout))
477			scanner.Scan()
478			line := scanner.Text()
479			ss := strings.Fields(line)
480			if len(ss) < 2 \|\| strings.HasPrefix(line, "Failed to get unit for PID") {
481			return ""
482			}
483			return ss[1]
484			}
485
486			func (l *base) scanWordPress() (err error) {
487			wpOpts := []string{l.ServerInfo.WordPress.OSUser,
488			l.ServerInfo.WordPress.DocRoot,
489			l.ServerInfo.WordPress.CmdPath,
490			l.ServerInfo.WordPress.WPVulnDBToken,
491			}
492			var isScanWp, hasEmptyOpt bool
493			for _, opt := range wpOpts {
494			if opt != "" {
495			isScanWp = true
496			break
497			} else {
498			hasEmptyOpt = true
499			}
500			}
501			if !isScanWp {
502			return nil
503			}
504
505			if hasEmptyOpt {
506			return xerrors.Errorf("%s has empty WordPress opts: %s",
507			l.getServerInfo().GetServerName(), wpOpts)
508			}
509
510			cmd := fmt.Sprintf("sudo -u %s -i -- %s cli version",
511			l.ServerInfo.WordPress.OSUser,
512			l.ServerInfo.WordPress.CmdPath)
513			if r := exec(l.ServerInfo, cmd, noSudo); !r.isSuccess() {
514			l.ServerInfo.WordPress.WPVulnDBToken = "secret"
515			return xerrors.Errorf("Failed to exec `%s`. Check the OS user, command path of wp-cli, DocRoot and permission: %#v", cmd, l.ServerInfo.WordPress)
516			}
517
518			wp, err := l.detectWordPress()
519			if err != nil {
520			return xerrors.Errorf("Failed to scan wordpress: %w", err)
			0 ignored issues – show introduced 2019-04-08 02:21 UTC by Report Bug Copy Issue Report unrecognized printf verb 'w' Loading history...
521			}
522			l.WordPress = wp
523			return nil
524			}
525
526			func (l base) detectWordPress() (models.WordPressPackages, error) {
527			ver, err := l.detectWpCore()
528			if err != nil {
529			return nil, err
530			}
531
532			themes, err := l.detectWpThemes()
533			if err != nil {
534			return nil, err
535			}
536
537			plugins, err := l.detectWpPlugins()
538			if err != nil {
539			return nil, err
540			}
541
542			pkgs := models.WordPressPackages{
543			models.WpPackage{
544			Name: models.WPCore,
545			Version: ver,
546			Type: models.WPCore,
547			},
548			}
549			pkgs = append(pkgs, themes...)
550			pkgs = append(pkgs, plugins...)
551			return &pkgs, nil
552			}
553
554			func (l *base) detectWpCore() (string, error) {
555			cmd := fmt.Sprintf("sudo -u %s -i -- %s core version --path=%s",
556			l.ServerInfo.WordPress.OSUser,
557			l.ServerInfo.WordPress.CmdPath,
558			l.ServerInfo.WordPress.DocRoot)
559
560			r := exec(l.ServerInfo, cmd, noSudo)
561			if !r.isSuccess() {
562			return "", xerrors.Errorf("Failed to get wp core version: %s", r)
563			}
564			return strings.TrimSpace(r.Stdout), nil
565			}
566
567			func (l *base) detectWpThemes() ([]models.WpPackage, error) {
568			cmd := fmt.Sprintf("sudo -u %s -i -- %s theme list --path=%s --format=json",
569			l.ServerInfo.WordPress.OSUser,
570			l.ServerInfo.WordPress.CmdPath,
571			l.ServerInfo.WordPress.DocRoot)
572
573			var themes []models.WpPackage
574			r := exec(l.ServerInfo, cmd, noSudo)
575			if !r.isSuccess() {
576			return nil, xerrors.Errorf("Failed to get a list of WordPress plugins: %s", r)
577			}
578			err := json.Unmarshal([]byte(r.Stdout), &themes)
579			if err != nil {
580			return nil, xerrors.Errorf("Failed to unmarshal wp theme list: %w", cmd, err)
			0 ignored issues – show introduced 2019-04-08 02:21 UTC by Report Bug Copy Issue Report unrecognized printf verb 'w' Loading history...
581			}
582			for i := range themes {
583			themes[i].Type = models.WPTheme
584			}
585			return themes, nil
586			}
587
588			func (l *base) detectWpPlugins() ([]models.WpPackage, error) {
589			cmd := fmt.Sprintf("sudo -u %s -i -- %s plugin list --path=%s --format=json",
590			l.ServerInfo.WordPress.OSUser,
591			l.ServerInfo.WordPress.CmdPath,
592			l.ServerInfo.WordPress.DocRoot)
593
594			var plugins []models.WpPackage
595			r := exec(l.ServerInfo, cmd, noSudo)
596			if !r.isSuccess() {
597			return nil, xerrors.Errorf("Failed to wp plugin list: %s", r)
598			}
599			if err := json.Unmarshal([]byte(r.Stdout), &plugins); err != nil {
600			return nil, err
601			}
602			for i := range plugins {
603			plugins[i].Type = models.WPPlugin
604			}
605			return plugins, nil
606			}
607

future-architect / vuls

Pull Request — master (#805)

scan.*base.detectServiceName A

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