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

Completed

Pull Request — master (#769)

unknown

created 2019-01-28 09:32 UTC

scan.*base.detectRunningOnAws C

↳ Parent: scan/base.go

Complexity

Conditions

Size

Total Lines	43
Code Lines	26

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	9
eloc	26
dl	0
loc	43
rs	6.6666
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/k0kubun/pp"
	"github.com/sirupsen/logrus"
)

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

	log  *logrus.Entry
	errs []error
}

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

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

	return err
}

//CveInfos hoge
type CveInfos struct {
	ReleaseDate     string    `json:"release_date"`
	ChangelogURL    string    `json:"changelog_url"`
	Status          string    `json:"status"`
	Vulnerabilities []CveInfo `json:"vulnerabilities"`
}

//CveInfo hoge
type CveInfo 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 hoge
type References struct {
	URL []string `json:"url"`
	Cve []string `json:"cve"`
}

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

	var coreVuln []models.VulnInfo
	if coreVuln, err = detectCore(c); err != nil {
		return
	}

	for _, i := range coreVuln {
		rs = append(rs, i)
	}
	return
}

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

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

				rs = append(rs, models.VulnInfo{
					CveID: e.References.Cve[0],
				})
			}
		}
		pp.Print(data)
	}
	return
}
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/k0kubun/pp"
32			"github.com/sirupsen/logrus"
33			)
34
35			type base struct {
36			ServerInfo config.ServerInfo
37			Distro config.Distro
38			Platform models.Platform
39			osPackages
40
41			log *logrus.Entry
42			errs []error
43			}
44
45			func (l *base) scanWp() (err error) {
46			if len(l.ServerInfo.WpPath) == 0 && len(l.ServerInfo.WpToken) == 0 {
47			return nil
48			}
49
50			var unsecures []models.VulnInfo
51			if unsecures, err = detectWp(l.ServerInfo); err != nil {
52			l.log.Errorf("Failed to scan wordpress: %s", err)
53			return err
54			}
55			for _, i := range unsecures {
56			l.VulnInfos[i.CveID] = i
57			}
58
59			return err
60			}
61
62			//CveInfos hoge
63			type CveInfos struct {
64			ReleaseDate string `json:"release_date"`
65			ChangelogURL string `json:"changelog_url"`
66			Status string `json:"status"`
67			Vulnerabilities []CveInfo `json:"vulnerabilities"`
68			}
69
70			//CveInfo hoge
71			type CveInfo struct {
72			ID int `json:"id"`
73			Title string `json:"title"`
74			CreatedAt string `json:"created_at"`
75			UpdatedAt string `json:"updated_at"`
76			PublishedDate string `json:"Published_date"`
77			VulnType string `json:"Vuln_type"`
78			References References `json:"references"`
79			FixedIn string `json:"fixed_in"`
80			}
81
82			//References hoge
83			type References struct {
84			URL []string `json:"url"`
85			Cve []string `json:"cve"`
86			}
87
88			func detectWp(c config.ServerInfo) (rs []models.VulnInfo, err error) {
89
90			var coreVuln []models.VulnInfo
91			if coreVuln, err = detectCore(c); err != nil {
92			return
93			}
94
95			for _, i := range coreVuln {
96			rs = append(rs, i)
97			}
98			return
99			}
100
101			func detectCore(c config.ServerInfo) (rs []models.VulnInfo, err error) {
102			cmd := fmt.Sprintf("wp core version --path=%s", c.WpPath)
103
104			var coreVersion string
105			if r := exec(c, cmd, noSudo); r.isSuccess() {
106			tmp := strings.Split(r.Stdout, ".")
107			coreVersion = strings.Join(tmp, "")
108			coreVersion = strings.TrimRight(coreVersion, "\r\n")
109			if len(coreVersion) == 0 {
110			return
111			}
112			pp.Print(coreVersion)
113			}
114			cmd = fmt.Sprintf("curl -H 'Authorization: Token token=%s' https://wpvulndb.com/api/v3/wordpresses/%s", c.WpToken, coreVersion)
115			if r := exec(c, cmd, noSudo); r.isSuccess() {
116			data := map[string]CveInfos{}
117			if err = json.Unmarshal([]byte(r.Stdout), &data); err != nil {
118			return
119			}
120			for _, i := range data {
121			for _, e := range i.Vulnerabilities {
122			for _, k := range e.References.Cve {
123			k = "CVE-" + k
124			pp.Print(k)
125			}
126
127			rs = append(rs, models.VulnInfo{
128			CveID: e.References.Cve[0],
129			})
130			}
131			}
132			pp.Print(data)
133			}
134			return
135			}
136			func (l *base) exec(cmd string, sudo bool) execResult {
137			return exec(l.ServerInfo, cmd, sudo, l.log)
138			}
139
140			func (l *base) setServerInfo(c config.ServerInfo) {
141			l.ServerInfo = c
142			}
143
144			func (l *base) getServerInfo() config.ServerInfo {
145			return l.ServerInfo
146			}
147
148			func (l *base) setDistro(fam, rel string) {
149			d := config.Distro{
150			Family: fam,
151			Release: rel,
152			}
153			l.Distro = d
154
155			s := l.getServerInfo()
156			s.Distro = d
157			l.setServerInfo(s)
158			}
159
160			func (l *base) getDistro() config.Distro {
161			return l.Distro
162			}
163
164			func (l *base) setPlatform(p models.Platform) {
165			l.Platform = p
166			}
167
168			func (l *base) getPlatform() models.Platform {
169			return l.Platform
170			}
171
172			func (l *base) runningKernel() (release, version string, err error) {
173			r := l.exec("uname -r", noSudo)
174			if !r.isSuccess() {
175			return "", "", fmt.Errorf("Failed to SSH: %s", r)
176			}
177			release = strings.TrimSpace(r.Stdout)
178
179			switch l.Distro.Family {
180			case config.Debian:
181			r := l.exec("uname -a", noSudo)
182			if !r.isSuccess() {
183			return "", "", fmt.Errorf("Failed to SSH: %s", r)
184			}
185			ss := strings.Fields(r.Stdout)
186			if 6 < len(ss) {
187			version = ss[6]
188			}
189			}
190			return
191			}
192
193			func (l *base) allContainers() (containers []config.Container, err error) {
194			switch l.ServerInfo.ContainerType {
195			case "", "docker":
196			stdout, err := l.dockerPs("-a --format '{{.ID}} {{.Names}} {{.Image}}'")
197			if err != nil {
198			return containers, err
199			}
200			return l.parseDockerPs(stdout)
201			case "lxd":
202			stdout, err := l.lxdPs("-c n")
203			if err != nil {
204			return containers, err
205			}
206			return l.parseLxdPs(stdout)
207			case "lxc":
208			stdout, err := l.lxcPs("-1")
209			if err != nil {
210			return containers, err
211			}
212			return l.parseLxcPs(stdout)
213			default:
214			return containers, fmt.Errorf(
215			"Not supported yet: %s", l.ServerInfo.ContainerType)
216			}
217			}
218
219			func (l *base) runningContainers() (containers []config.Container, err error) {
220			switch l.ServerInfo.ContainerType {
221			case "", "docker":
222			stdout, err := l.dockerPs("--format '{{.ID}} {{.Names}} {{.Image}}'")
223			if err != nil {
224			return containers, err
225			}
226			return l.parseDockerPs(stdout)
227			case "lxd":
228			stdout, err := l.lxdPs("volatile.last_state.power=RUNNING -c n")
229			if err != nil {
230			return containers, err
231			}
232			return l.parseLxdPs(stdout)
233			case "lxc":
234			stdout, err := l.lxcPs("-1 --running")
235			if err != nil {
236			return containers, err
237			}
238			return l.parseLxcPs(stdout)
239			default:
240			return containers, fmt.Errorf(
241			"Not supported yet: %s", l.ServerInfo.ContainerType)
242			}
243			}
244
245			func (l *base) exitedContainers() (containers []config.Container, err error) {
246			switch l.ServerInfo.ContainerType {
247			case "", "docker":
248			stdout, err := l.dockerPs("--filter 'status=exited' --format '{{.ID}} {{.Names}} {{.Image}}'")
249			if err != nil {
250			return containers, err
251			}
252			return l.parseDockerPs(stdout)
253			case "lxd":
254			stdout, err := l.lxdPs("volatile.last_state.power=STOPPED -c n")
255			if err != nil {
256			return containers, err
257			}
258			return l.parseLxdPs(stdout)
259			case "lxc":
260			stdout, err := l.lxcPs("-1 --stopped")
261			if err != nil {
262			return containers, err
263			}
264			return l.parseLxcPs(stdout)
265			default:
266			return containers, fmt.Errorf(
267			"Not supported yet: %s", l.ServerInfo.ContainerType)
268			}
269			}
270
271			func (l *base) dockerPs(option string) (string, error) {
272			cmd := fmt.Sprintf("docker ps %s", option)
273			r := l.exec(cmd, noSudo)
274			if !r.isSuccess() {
275			return "", fmt.Errorf("Failed to SSH: %s", r)
276			}
277			return r.Stdout, nil
278			}
279
280			func (l *base) lxdPs(option string) (string, error) {
281			cmd := fmt.Sprintf("lxc list %s", option)
282			r := l.exec(cmd, noSudo)
283			if !r.isSuccess() {
284			return "", fmt.Errorf("failed to SSH: %s", r)
285			}
286			return r.Stdout, nil
287			}
288
289			func (l *base) lxcPs(option string) (string, error) {
290			cmd := fmt.Sprintf("lxc-ls %s 2>/dev/null", option)
291			r := l.exec(cmd, sudo)
292			if !r.isSuccess() {
293			return "", fmt.Errorf("failed to SSH: %s", r)
294			}
295			return r.Stdout, nil
296			}
297
298			func (l *base) parseDockerPs(stdout string) (containers []config.Container, err error) {
299			lines := strings.Split(stdout, "\n")
300			for _, line := range lines {
301			fields := strings.Fields(line)
302			if len(fields) == 0 {
303			break
304			}
305			if len(fields) != 3 {
306			return containers, fmt.Errorf("Unknown format: %s", line)
307			}
308			containers = append(containers, config.Container{
309			ContainerID: fields[0],
310			Name: fields[1],
311			Image: fields[2],
312			})
313			}
314			return
315			}
316
317			func (l *base) parseLxdPs(stdout string) (containers []config.Container, err error) {
318			lines := strings.Split(stdout, "\n")
319			for i, line := range lines[3:] {
320			if i%2 == 1 {
321			continue
322			}
323			fields := strings.Fields(strings.Replace(line, "\|", " ", -1))
324			if len(fields) == 0 {
325			break
326			}
327			if len(fields) != 1 {
328			return containers, fmt.Errorf("Unknown format: %s", line)
329			}
330			containers = append(containers, config.Container{
331			ContainerID: fields[0],
332			Name: fields[0],
333			})
334			}
335			return
336			}
337
338			func (l *base) parseLxcPs(stdout string) (containers []config.Container, err error) {
339			lines := strings.Split(stdout, "\n")
340			for _, line := range lines {
341			fields := strings.Fields(line)
342			if len(fields) == 0 {
343			break
344			}
345			containers = append(containers, config.Container{
346			ContainerID: fields[0],
347			Name: fields[0],
348			})
349			}
350			return
351			}
352
353			// ip executes ip command and returns IP addresses
354			func (l *base) ip() ([]string, []string, error) {
355			// e.g.
356			// 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
357			// 2: eth0 inet 10.0.2.15/24 brd 10.0.2.255 scope global eth0
358			// 2: eth0 inet6 fe80::5054:ff:fe2a:864c/64 scope link \ valid_lft forever preferred_lft forever
359			r := l.exec("/sbin/ip -o addr", noSudo)
360			if !r.isSuccess() {
361			return nil, nil, fmt.Errorf("Failed to detect IP address: %v", r)
362			}
363			ipv4Addrs, ipv6Addrs := l.parseIP(r.Stdout)
364			return ipv4Addrs, ipv6Addrs, nil
365			}
366
367			// parseIP parses the results of ip command
368			func (l *base) parseIP(stdout string) (ipv4Addrs []string, ipv6Addrs []string) {
369			lines := strings.Split(stdout, "\n")
370			for _, line := range lines {
371			fields := strings.Fields(line)
372			if len(fields) < 4 {
373			continue
374			}
375			ip, _, err := net.ParseCIDR(fields[3])
376			if err != nil {
377			continue
378			}
379			if !ip.IsGlobalUnicast() {
380			continue
381			}
382			if ipv4 := ip.To4(); ipv4 != nil {
383			ipv4Addrs = append(ipv4Addrs, ipv4.String())
384			} else {
385			ipv6Addrs = append(ipv6Addrs, ip.String())
386			}
387			}
388			return
389			}
390
391			func (l *base) detectPlatform() {
392			if l.getServerInfo().Mode.IsOffline() {
393			l.setPlatform(models.Platform{Name: "unknown"})
394			return
395			}
396			ok, instanceID, err := l.detectRunningOnAws()
397			if err != nil {
398			l.setPlatform(models.Platform{Name: "other"})
399			return
400			}
401			if ok {
402			l.setPlatform(models.Platform{
403			Name: "aws",
404			InstanceID: instanceID,
405			})
406			return
407			}
408
409			//TODO Azure, GCP...
410			l.setPlatform(models.Platform{Name: "other"})
411			return
412			}
413
414			func (l *base) detectRunningOnAws() (ok bool, instanceID string, err error) {
415			if r := l.exec("type curl", noSudo); r.isSuccess() {
416			cmd := "curl --max-time 1 --noproxy 169.254.169.254 http://169.254.169.254/latest/meta-data/instance-id"
417			r := l.exec(cmd, noSudo)
418			if r.isSuccess() {
419			id := strings.TrimSpace(r.Stdout)
420			if !l.isAwsInstanceID(id) {
421			return false, "", nil
422			}
423			return true, id, nil
424			}
425
426			switch r.ExitStatus {
427			case 28, 7:
428			// Not running on AWS
429			// 7 Failed to connect to host.
430			// 28 operation timeout.
431			return false, "", nil
432			}
433			}
434
435			if r := l.exec("type wget", noSudo); r.isSuccess() {
436			cmd := "wget --tries=3 --timeout=1 --no-proxy -q -O - http://169.254.169.254/latest/meta-data/instance-id"
437			r := l.exec(cmd, noSudo)
438			if r.isSuccess() {
439			id := strings.TrimSpace(r.Stdout)
440			if !l.isAwsInstanceID(id) {
441			return false, "", nil
442			}
443			return true, id, nil
444			}
445
446			switch r.ExitStatus {
447			case 4, 8:
448			// Not running on AWS
449			// 4 Network failure
450			// 8 Server issued an error response.
451			return false, "", nil
452			}
453			}
454			return false, "", fmt.Errorf(
455			"Failed to curl or wget to AWS instance metadata on %s. container: %s",
456			l.ServerInfo.ServerName, l.ServerInfo.Container.Name)
457			}
458
459			// http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resource-ids.html
460			var awsInstanceIDPattern = regexp.MustCompile(`^i-[0-9a-f]+$`)
461
462			func (l *base) isAwsInstanceID(str string) bool {
463			return awsInstanceIDPattern.MatchString(str)
464			}
465
466			func (l *base) convertToModel() models.ScanResult {
467			ctype := l.ServerInfo.ContainerType
468			if l.ServerInfo.Container.ContainerID != "" && ctype == "" {
469			ctype = "docker"
470			}
471			container := models.Container{
472			ContainerID: l.ServerInfo.Container.ContainerID,
473			Name: l.ServerInfo.Container.Name,
474			Image: l.ServerInfo.Container.Image,
475			Type: ctype,
476			}
477
478			errs := []string{}
479			for _, e := range l.errs {
480			errs = append(errs, fmt.Sprintf("%s", e))
481			}
482
483			return models.ScanResult{
484			JSONVersion: models.JSONVersion,
485			ServerName: l.ServerInfo.ServerName,
486			ScannedAt: time.Now(),
487			ScanMode: l.ServerInfo.Mode.String(),
488			Family: l.Distro.Family,
489			Release: l.Distro.Release,
490			Container: container,
491			Platform: l.Platform,
492			IPv4Addrs: l.ServerInfo.IPv4Addrs,
493			IPv6Addrs: l.ServerInfo.IPv6Addrs,
494			ScannedCves: l.VulnInfos,
495			RunningKernel: l.Kernel,
496			Packages: l.Packages,
497			SrcPackages: l.SrcPackages,
498			Optional: l.ServerInfo.Optional,
499			Errors: errs,
500			}
501			}
502
503			func (l *base) setErrs(errs []error) {
504			l.errs = errs
505			}
506
507			func (l *base) getErrs() []error {
508			return l.errs
509			}
510
511			const (
512			systemd = "systemd"
513			upstart = "upstart"
514			sysVinit = "init"
515			)
516
517			// https://unix.stackexchange.com/questions/196166/how-to-find-out-if-a-system-uses-sysv-upstart-or-systemd-initsystem
518			func (l *base) detectInitSystem() (string, error) {
519			var f func(string) (string, error)
520			f = func(cmd string) (string, error) {
521			r := l.exec(cmd, sudo)
522			if !r.isSuccess() {
523			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
524			}
525			scanner := bufio.NewScanner(strings.NewReader(r.Stdout))
526			scanner.Scan()
527			line := strings.TrimSpace(scanner.Text())
528			if strings.Contains(line, "systemd") {
529			return systemd, nil
530			} else if strings.Contains(line, "upstart") {
531			return upstart, nil
532			} else if strings.Contains(line, "File: ‘/proc/1/exe’ -> ‘/sbin/init’") \|\|
533			strings.Contains(line, "File: `/proc/1/exe' -> `/sbin/init'") {
534			return f("stat /sbin/init")
535			} else if line == "File: ‘/sbin/init’" \|\|
536			line == "File: `/sbin/init'" {
537			r := l.exec("/sbin/init --version", noSudo)
538			if r.isSuccess() {
539			if strings.Contains(r.Stdout, "upstart") {
540			return upstart, nil
541			}
542			}
543			return sysVinit, nil
544			}
545			return "", fmt.Errorf("Failed to detect a init system: %s", line)
546			}
547			return f("stat /proc/1/exe")
548			}
549
550			func (l *base) detectServiceName(pid string) (string, error) {
551			cmd := fmt.Sprintf("systemctl status --quiet --no-pager %s", pid)
552			r := l.exec(cmd, noSudo)
553			if !r.isSuccess() {
554			return "", fmt.Errorf("Failed to stat %s: %s", cmd, r)
555			}
556			return l.parseSystemctlStatus(r.Stdout), nil
557			}
558
559			func (l *base) parseSystemctlStatus(stdout string) string {
560			scanner := bufio.NewScanner(strings.NewReader(stdout))
561			scanner.Scan()
562			line := scanner.Text()
563			ss := strings.Fields(line)
564			if len(ss) < 2 \|\| strings.HasPrefix(line, "Failed to get unit for PID") {
565			return ""
566			}
567			return ss[1]
568			}
569

future-architect / vuls

Pull Request — master (#769)

scan.*base.detectRunningOnAws C

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like