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scan.go
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scan.go
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package subcmds
import (
"context"
"flag"
"fmt"
"io"
"os"
"path/filepath"
"strings"
"github.com/asaskevich/govalidator"
"github.com/future-architect/vuls/config"
"github.com/future-architect/vuls/logging"
"github.com/future-architect/vuls/scanner"
"github.com/google/subcommands"
"github.com/k0kubun/pp"
)
// ScanCmd is Subcommand of host discovery mode
type ScanCmd struct {
configPath string
timeoutSec int
scanTimeoutSec int
cacheDBPath string
detectIPS bool
}
// Name return subcommand name
func (*ScanCmd) Name() string { return "scan" }
// Synopsis return synopsis
func (*ScanCmd) Synopsis() string { return "Scan vulnerabilities" }
// Usage return usage
func (*ScanCmd) Usage() string {
return `scan:
scan
[-config=/path/to/config.toml]
[-results-dir=/path/to/results]
[-log-to-file]
[-log-dir=/path/to/log]
[-cachedb-path=/path/to/cache.db]
[-http-proxy=http://192.168.0.1:8080]
[-timeout=300]
[-timeout-scan=7200]
[-debug]
[-quiet]
[-pipe]
[-vvv]
[-ips]
[SERVER]...
`
}
// SetFlags set flag
func (p *ScanCmd) SetFlags(f *flag.FlagSet) {
f.BoolVar(&config.Conf.Debug, "debug", false, "debug mode")
f.BoolVar(&config.Conf.Quiet, "quiet", false, "Quiet mode. No output on stdout")
wd, _ := os.Getwd()
defaultConfPath := filepath.Join(wd, "config.toml")
f.StringVar(&p.configPath, "config", defaultConfPath, "/path/to/toml")
defaultResultsDir := filepath.Join(wd, "results")
f.StringVar(&config.Conf.ResultsDir, "results-dir", defaultResultsDir, "/path/to/results")
defaultLogDir := logging.GetDefaultLogDir()
f.StringVar(&config.Conf.LogDir, "log-dir", defaultLogDir, "/path/to/log")
f.BoolVar(&config.Conf.LogToFile, "log-to-file", false, "Output log to file")
defaultCacheDBPath := filepath.Join(wd, "cache.db")
f.StringVar(&p.cacheDBPath, "cachedb-path", defaultCacheDBPath,
"/path/to/cache.db (local cache of changelog for Ubuntu/Debian)")
f.StringVar(&config.Conf.HTTPProxy, "http-proxy", "",
"http://proxy-url:port (default: empty)")
f.BoolVar(&config.Conf.Pipe, "pipe", false, "Use stdin via PIPE")
f.BoolVar(&p.detectIPS, "ips", false, "retrieve IPS information")
f.BoolVar(&config.Conf.Vvv, "vvv", false, "ssh -vvv")
f.IntVar(&p.timeoutSec, "timeout", 5*60,
"Number of seconds for processing other than scan",
)
f.IntVar(&p.scanTimeoutSec, "timeout-scan", 120*60,
"Number of seconds for scanning vulnerabilities for all servers",
)
}
// Execute execute
func (p *ScanCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
logging.Log = logging.NewCustomLogger(config.Conf.Debug, config.Conf.Quiet, config.Conf.LogToFile, config.Conf.LogDir, "", "")
logging.Log.Infof("vuls-%s-%s", config.Version, config.Revision)
if err := mkdirDotVuls(); err != nil {
logging.Log.Errorf("Failed to create $HOME/.vuls err: %+v", err)
return subcommands.ExitUsageError
}
if len(p.cacheDBPath) != 0 {
if ok, _ := govalidator.IsFilePath(p.cacheDBPath); !ok {
logging.Log.Errorf("Cache DB path must be a *Absolute* file path. -cache-dbpath: %s",
p.cacheDBPath)
return subcommands.ExitUsageError
}
}
if err := config.Load(p.configPath); err != nil {
msg := []string{
fmt.Sprintf("Error loading %s", p.configPath),
"If you update Vuls and get this error, there may be incompatible changes in config.toml",
"Please check config.toml template : https://vuls.io/docs/en/config.toml.html",
}
logging.Log.Errorf("%s\n%+v", strings.Join(msg, "\n"), err)
return subcommands.ExitUsageError
}
logging.Log.Info("Start scanning")
logging.Log.Infof("config: %s", p.configPath)
var servernames []string
if 0 < len(f.Args()) {
servernames = f.Args()
} else if config.Conf.Pipe {
bytes, err := io.ReadAll(os.Stdin)
if err != nil {
logging.Log.Errorf("Failed to read stdin. err: %+v", err)
return subcommands.ExitFailure
}
fields := strings.Fields(string(bytes))
if 0 < len(fields) {
servernames = fields
}
}
targets := make(map[string]config.ServerInfo)
for _, arg := range servernames {
found := false
for _, info := range config.Conf.Servers {
if info.BaseName == arg {
targets[info.ServerName] = info
found = true
}
}
if !found {
logging.Log.Errorf("%s is not in config", arg)
return subcommands.ExitUsageError
}
}
if 0 < len(servernames) {
// if scan target servers are specified by args, set to the config
config.Conf.Servers = targets
} else {
// if not specified by args, scan all servers in the config
targets = config.Conf.Servers
}
logging.Log.Debugf("%s", pp.Sprintf("%v", targets))
logging.Log.Info("Validating config...")
if !config.Conf.ValidateOnScan() {
return subcommands.ExitUsageError
}
s := scanner.Scanner{
ResultsDir: config.Conf.ResultsDir,
TimeoutSec: p.timeoutSec,
ScanTimeoutSec: p.scanTimeoutSec,
CacheDBPath: p.cacheDBPath,
Targets: targets,
Debug: config.Conf.Debug,
Quiet: config.Conf.Quiet,
LogToFile: config.Conf.LogToFile,
LogDir: config.Conf.LogDir,
DetectIPS: p.detectIPS,
}
if err := s.Scan(); err != nil {
logging.Log.Errorf("Failed to scan: %+v", err)
return subcommands.ExitFailure
}
fmt.Printf("\n\n\n")
fmt.Println("To view the detail, vuls tui is useful.")
fmt.Println("To send a report, run vuls report -h.")
return subcommands.ExitSuccess
}