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

Passed

Pull Request — master (#769)

unknown

created 2019-01-28 06:19 UTC

scan.*base.scanWp A

↳ Parent: scan/base.go

Complexity

Conditions

Size

Total Lines	13
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	4
eloc	9
dl	0
loc	13
rs	9.95
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
	}
	l.VulnInfos[unsecures.CveID] = unsecures

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

future-architect / vuls

Pull Request — master (#769)

scan.*base.scanWp A

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