feat(scan): support external port scanner(nmap) in host machine (#1207)
* feat(scan): load portscan settings from config.toml * feat(scan): support external port scanner:nmap * style: rename variable * feat(scan): logging apply options * feat(scan): remove spoof ip address option * feat(scan): more validate port scan config * style: change comment * fix: parse port number as uint16 * feat(discover): add portscan section * feat(discover): change default scanTechniques * feat(docker): add nmap and version update * feat(scan): nmap module upgrade * fix: wrap err using %w * feat(scan): print cmd using external port scanner * feat(scan): more details external port scan command * feat(scan): add capability check in validation * fix(scanner): format error * chore: change format
This commit is contained in:
Norihiro NAKAOKA
181
scanner/base.go
181
scanner/base.go
@@ -10,6 +10,7 @@ import (
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"os"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"sync"
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"time"
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@@ -32,6 +33,8 @@ import (
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_ "github.com/aquasecurity/fanal/analyzer/library/pipenv"
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_ "github.com/aquasecurity/fanal/analyzer/library/poetry"
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_ "github.com/aquasecurity/fanal/analyzer/library/yarn"
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nmap "github.com/Ullaakut/nmap/v2"
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)
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type base struct {
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@@ -836,26 +839,196 @@ func (l *base) detectScanDest() map[string][]string {
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}
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func (l *base) execPortsScan(scanDestIPPorts map[string][]string) ([]string, error) {
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if l.getServerInfo().PortScan.IsUseExternalScanner {
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listenIPPorts, err := l.execExternalPortScan(scanDestIPPorts)
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if err != nil {
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return []string{}, err
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}
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return listenIPPorts, nil
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}
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listenIPPorts, err := l.execNativePortScan(scanDestIPPorts)
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if err != nil {
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return []string{}, err
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}
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return listenIPPorts, nil
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}
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func (l *base) execNativePortScan(scanDestIPPorts map[string][]string) ([]string, error) {
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l.log.Info("Using Port Scanner: Vuls built-in Scanner")
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listenIPPorts := []string{}
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for ip, ports := range scanDestIPPorts {
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if !isLocalExec(l.ServerInfo.Port, l.ServerInfo.Host) && net.ParseIP(ip).IsLoopback() {
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continue
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}
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for _, port := range ports {
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scanDest := ip + ":" + port
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conn, err := net.DialTimeout("tcp", scanDest, time.Duration(1)*time.Second)
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isOpen, err := nativeScanPort(scanDest)
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if err != nil {
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continue
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return []string{}, err
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}
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if isOpen {
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listenIPPorts = append(listenIPPorts, scanDest)
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}
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conn.Close()
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listenIPPorts = append(listenIPPorts, scanDest)
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}
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}
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return listenIPPorts, nil
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}
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func nativeScanPort(scanDest string) (bool, error) {
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conn, err := net.DialTimeout("tcp", scanDest, time.Duration(1)*time.Second)
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if err != nil {
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if strings.Contains(err.Error(), "i/o timeout") || strings.Contains(err.Error(), "connection refused") {
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return false, nil
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}
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if strings.Contains(err.Error(), "too many open files") {
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time.Sleep(time.Duration(1) * time.Second)
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return nativeScanPort(scanDest)
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}
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return false, err
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}
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conn.Close()
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return true, nil
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}
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func (l *base) execExternalPortScan(scanDestIPPorts map[string][]string) ([]string, error) {
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portScanConf := l.getServerInfo().PortScan
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l.log.Infof("Using Port Scanner: External Scanner(PATH: %s)", portScanConf.ScannerBinPath)
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l.log.Infof("External Scanner Apply Options: Scan Techniques: %s, HasPrivileged: %t, Source Port: %s",
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strings.Join(portScanConf.ScanTechniques, ","), portScanConf.HasPrivileged, portScanConf.SourcePort)
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baseCmd := formatNmapOptionsToString(portScanConf)
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listenIPPorts := []string{}
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for ip, ports := range scanDestIPPorts {
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if !isLocalExec(l.ServerInfo.Port, l.ServerInfo.Host) && net.ParseIP(ip).IsLoopback() {
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continue
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}
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_, cancel := context.WithTimeout(context.Background(), 5*time.Minute)
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defer cancel()
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scanner, err := nmap.NewScanner(nmap.WithBinaryPath(portScanConf.ScannerBinPath))
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if err != nil {
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return []string{}, xerrors.Errorf("unable to create nmap scanner: %w", err)
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}
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scanTechnique, err := l.setScanTechniques()
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if err != nil {
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return []string{}, err
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}
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scanner.AddOptions(scanTechnique)
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if portScanConf.HasPrivileged {
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scanner.AddOptions(nmap.WithPrivileged())
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} else {
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scanner.AddOptions(nmap.WithUnprivileged())
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}
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if portScanConf.SourcePort != "" {
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port, err := strconv.ParseUint(portScanConf.SourcePort, 10, 16)
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if err != nil {
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return []string{}, xerrors.Errorf("failed to strconv.ParseUint(%s, 10, 16) = %w", portScanConf.SourcePort, err)
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}
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scanner.AddOptions(nmap.WithSourcePort(uint16(port)))
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}
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cmd := []string{baseCmd}
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if strings.Contains(ip, ":") {
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scanner.AddOptions(nmap.WithTargets(ip[1:len(ip)-1]), nmap.WithPorts(ports...), nmap.WithIPv6Scanning())
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cmd = append(cmd, "-p", strings.Join(ports, ","), ip[1:len(ip)-1])
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} else {
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scanner.AddOptions(nmap.WithTargets(ip), nmap.WithPorts(ports...))
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cmd = append(cmd, "-p", strings.Join(ports, ","), ip)
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}
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l.log.Debugf("Executing... %s", strings.Replace(strings.Join(cmd, " "), "\n", "", -1))
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result, warnings, err := scanner.Run()
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if err != nil {
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return []string{}, xerrors.Errorf("unable to run nmap scan: %w", err)
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}
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if warnings != nil {
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l.log.Warnf("nmap scan warnings: %s", warnings)
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}
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for _, host := range result.Hosts {
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if len(host.Ports) == 0 || len(host.Addresses) == 0 {
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continue
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}
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for _, port := range host.Ports {
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if strings.Contains(string(port.Status()), string(nmap.Open)) {
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scanDest := fmt.Sprintf("%s:%d", ip, port.ID)
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listenIPPorts = append(listenIPPorts, scanDest)
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}
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}
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}
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}
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return listenIPPorts, nil
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}
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func formatNmapOptionsToString(conf *config.PortScanConf) string {
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cmd := []string{conf.ScannerBinPath}
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if len(conf.ScanTechniques) != 0 {
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for _, technique := range conf.ScanTechniques {
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cmd = append(cmd, "-"+technique)
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}
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}
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if conf.SourcePort != "" {
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cmd = append(cmd, "--source-port "+conf.SourcePort)
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}
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if conf.HasPrivileged {
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cmd = append(cmd, "--privileged")
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}
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return strings.Join(cmd, " ")
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}
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func (l *base) setScanTechniques() (func(*nmap.Scanner), error) {
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scanTechniques := l.getServerInfo().PortScan.GetScanTechniques()
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if len(scanTechniques) == 0 {
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if l.getServerInfo().PortScan.HasPrivileged {
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return nmap.WithSYNScan(), nil
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}
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return nmap.WithConnectScan(), nil
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}
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for _, technique := range scanTechniques {
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switch technique {
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case config.TCPSYN:
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return nmap.WithSYNScan(), nil
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case config.TCPConnect:
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return nmap.WithConnectScan(), nil
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case config.TCPACK:
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return nmap.WithACKScan(), nil
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case config.TCPWindow:
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return nmap.WithWindowScan(), nil
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case config.TCPMaimon:
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return nmap.WithMaimonScan(), nil
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case config.TCPNull:
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return nmap.WithTCPNullScan(), nil
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case config.TCPFIN:
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return nmap.WithTCPFINScan(), nil
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case config.TCPXmas:
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return nmap.WithTCPXmasScan(), nil
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}
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}
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return nil, xerrors.Errorf("Failed to setScanTechniques. There is an unsupported option in ScanTechniques.")
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}
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func (l *base) updatePortStatus(listenIPPorts []string) {
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for name, p := range l.osPackages.Packages {
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if p.AffectedProcs == nil {
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