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feat: added initial live DAST server implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
| "encoding/hex" | ||
| "net/url" | ||
| "sort" | ||
| "strings" | ||
| "sync" | ||
|
|
||
| "github.com/projectdiscovery/nuclei/v3/pkg/input/types" | ||
| mapsutil "github.com/projectdiscovery/utils/maps" | ||
| ) | ||
|
|
||
| var dynamicHeaders = map[string]bool{ | ||
| "date": true, | ||
| "if-modified-since": true, | ||
| "if-unmodified-since": true, | ||
| "cache-control": true, | ||
| "if-none-match": true, | ||
| "if-match": true, | ||
| "authorization": true, | ||
| "cookie": true, | ||
| "x-csrf-token": true, | ||
| "content-length": true, | ||
| "content-md5": true, | ||
| "host": true, | ||
| "x-request-id": true, | ||
| "x-correlation-id": true, | ||
| "user-agent": true, | ||
| "referer": true, | ||
| } | ||
|
|
||
| type requestDeduplicator struct { | ||
| hashes map[string]struct{} | ||
| lock *sync.RWMutex | ||
| } | ||
|
|
||
| func newRequestDeduplicator() *requestDeduplicator { | ||
| return &requestDeduplicator{ | ||
| hashes: make(map[string]struct{}), | ||
| lock: &sync.RWMutex{}, | ||
| } | ||
| } | ||
|
|
||
| func (r *requestDeduplicator) isDuplicate(req *types.RequestResponse) bool { | ||
| hash, err := hashRequest(req) | ||
| if err != nil { | ||
| return false | ||
| } | ||
|
|
||
| r.lock.RLock() | ||
| _, ok := r.hashes[hash] | ||
| r.lock.RUnlock() | ||
| if ok { | ||
| return true | ||
| } | ||
|
|
||
| r.lock.Lock() | ||
| r.hashes[hash] = struct{}{} | ||
| r.lock.Unlock() | ||
| return false | ||
| } | ||
|
|
||
| func hashRequest(req *types.RequestResponse) (string, error) { | ||
| normalizedURL, err := normalizeURL(req.URL.URL) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| var hashContent strings.Builder | ||
| hashContent.WriteString(req.Request.Method) | ||
| hashContent.WriteString(normalizedURL) | ||
|
|
||
| headers := sortedNonDynamicHeaders(req.Request.Headers) | ||
| for _, header := range headers { | ||
| hashContent.WriteString(header.Key) | ||
| hashContent.WriteString(header.Value) | ||
| } | ||
|
|
||
| if len(req.Request.Body) > 0 { | ||
| hashContent.Write([]byte(req.Request.Body)) | ||
| } | ||
|
|
||
| // Calculate the SHA256 hash | ||
| hash := sha256.Sum256([]byte(hashContent.String())) | ||
| return hex.EncodeToString(hash[:]), nil | ||
| } | ||
|
|
||
| func normalizeURL(u *url.URL) (string, error) { | ||
| query := u.Query() | ||
| sortedQuery := make(url.Values) | ||
| for k, v := range query { | ||
| sort.Strings(v) | ||
| sortedQuery[k] = v | ||
| } | ||
| u.RawQuery = sortedQuery.Encode() | ||
|
|
||
| if u.Path == "" { | ||
| u.Path = "/" | ||
| } | ||
| return u.String(), nil | ||
| } | ||
|
|
||
| type header struct { | ||
| Key string | ||
| Value string | ||
| } | ||
|
|
||
| func sortedNonDynamicHeaders(headers mapsutil.OrderedMap[string, string]) []header { | ||
| var result []header | ||
| headers.Iterate(func(k, v string) bool { | ||
| if !dynamicHeaders[strings.ToLower(k)] { | ||
| result = append(result, header{Key: k, Value: v}) | ||
| } | ||
| return true | ||
| }) | ||
| sort.Slice(result, func(i, j int) bool { | ||
| return result[i].Key < result[j].Key | ||
| }) | ||
| return result | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "os/exec" | ||
|
|
||
| "github.com/projectdiscovery/nuclei/v3/pkg/output" | ||
| "gopkg.in/yaml.v2" | ||
| ) | ||
|
|
||
| // proxifyRequest is a request for proxify | ||
| type proxifyRequest struct { | ||
| URL string `json:"url"` | ||
| Request struct { | ||
| Header map[string]string `json:"header"` | ||
| Body string `json:"body"` | ||
| Raw string `json:"raw"` | ||
| } `json:"request"` | ||
| } | ||
|
|
||
| func runNucleiWithFuzzingInput(target PostReuestsHandlerRequest, templates []string) ([]output.ResultEvent, error) { | ||
| cmd := exec.Command("nuclei") | ||
|
|
||
| tempFile, err := os.CreateTemp("", "nuclei-fuzz-*.yaml") | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error creating temp file: %s", err) | ||
| } | ||
| defer os.Remove(tempFile.Name()) | ||
|
|
||
| payload := proxifyRequest{ | ||
| URL: target.URL, | ||
| Request: struct { | ||
| Header map[string]string `json:"header"` | ||
| Body string `json:"body"` | ||
| Raw string `json:"raw"` | ||
| }{ | ||
| Raw: target.RawHTTP, | ||
| }, | ||
| } | ||
|
|
||
| marshalledYaml, err := yaml.Marshal(payload) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error marshalling yaml: %s", err) | ||
| } | ||
|
|
||
| if _, err := tempFile.Write(marshalledYaml); err != nil { | ||
| return nil, fmt.Errorf("error writing to temp file: %s", err) | ||
| } | ||
|
|
||
| argsArray := []string{ | ||
| "-duc", | ||
| "-dast", | ||
| "-silent", | ||
| "-no-color", | ||
| "-jsonl", | ||
| } | ||
| for _, template := range templates { | ||
| argsArray = append(argsArray, "-t", template) | ||
| } | ||
| argsArray = append(argsArray, "-l", tempFile.Name()) | ||
| argsArray = append(argsArray, "-im=yaml") | ||
| cmd.Args = append(cmd.Args, argsArray...) | ||
|
|
||
| data, err := cmd.Output() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error running nuclei: %w", err) | ||
| } | ||
|
|
||
| var nucleiResult []output.ResultEvent | ||
| decoder := json.NewDecoder(bytes.NewReader(data)) | ||
| for { | ||
| var result output.ResultEvent | ||
| if err := decoder.Decode(&result); err != nil { | ||
| if err == io.EOF { | ||
| break | ||
| } | ||
| return nil, fmt.Errorf("error decoding nuclei output: %w", err) | ||
| } | ||
| // Filter results with a valid template-id | ||
| if result.TemplateID != "" { | ||
| nucleiResult = append(nucleiResult, result) | ||
| } | ||
| } | ||
|
|
||
| return nucleiResult, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "github.com/pkg/errors" | ||
| "github.com/projectdiscovery/gologger" | ||
| "github.com/projectdiscovery/nuclei/v3/pkg/input/types" | ||
| ) | ||
|
|
||
| func (s *DASTServer) setupWorkers() { | ||
| go s.tasksConsumer() | ||
| } | ||
|
|
||
| func (s *DASTServer) tasksConsumer() { | ||
| for req := range s.fuzzRequests { | ||
| parsedReq, err := parseRawRequest(req) | ||
| if err != nil { | ||
| gologger.Warning().Msgf("Could not parse raw request: %s\n", err) | ||
| continue | ||
| } | ||
|
|
||
| inScope, err := s.scopeManager.Validate(parsedReq.URL.URL, "") | ||
| if err != nil { | ||
| gologger.Warning().Msgf("Could not validate scope: %s\n", err) | ||
| continue | ||
| } | ||
| if !inScope { | ||
| gologger.Warning().Msgf("Request is out of scope: %s %s\n", parsedReq.Request.Method, parsedReq.URL.String()) | ||
| continue | ||
| } | ||
|
|
||
| if s.deduplicator.isDuplicate(parsedReq) { | ||
| gologger.Warning().Msgf("Duplicate request detected: %s %s\n", parsedReq.Request.Method, parsedReq.URL.String()) | ||
| continue | ||
| } | ||
|
|
||
| gologger.Verbose().Msgf("Fuzzing request: %s %s\n", parsedReq.Request.Method, parsedReq.URL.String()) | ||
| s.tasksPool.Go(func() { | ||
| s.fuzzRequest(req) | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func (s *DASTServer) fuzzRequest(req PostReuestsHandlerRequest) { | ||
| results, err := runNucleiWithFuzzingInput(req, s.options.Templates) | ||
| if err != nil { | ||
| gologger.Warning().Msgf("Could not run nuclei: %s\n", err) | ||
| return | ||
| } | ||
|
|
||
| for _, result := range results { | ||
| if err := s.options.OutputWriter.Write(&result); err != nil { | ||
| gologger.Error().Msgf("Could not write result: %s\n", err) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func parseRawRequest(req PostReuestsHandlerRequest) (*types.RequestResponse, error) { | ||
| parsedReq, err := types.ParseRawRequestWithURL(req.RawHTTP, req.URL) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "could not parse raw HTTP") | ||
| } | ||
| return parsedReq, nil | ||
| } |
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