b57bd5e7d9
- SourceMapSource probes .map files for original source containing API keys - WebpackSource scans JS bundles for inlined NEXT_PUBLIC_/REACT_APP_/VITE_ env vars - EnvLeakSource probes common .env paths for exposed environment files - All three implement ReconSource, credentialless, with httptest-based tests
112 lines
2.6 KiB
Go
112 lines
2.6 KiB
Go
package sources
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import (
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"context"
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"fmt"
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"io"
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"net/http"
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"regexp"
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"time"
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"golang.org/x/time/rate"
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"github.com/salvacybersec/keyhunter/pkg/providers"
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"github.com/salvacybersec/keyhunter/pkg/recon"
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)
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// EnvLeakSource probes for publicly accessible .env files on web servers.
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// Many web frameworks (Laravel, Rails, Node/Express, Django) use .env files
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// for configuration. Misconfigured servers frequently serve these files
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// directly, exposing API keys and database credentials.
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type EnvLeakSource struct {
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BaseURL string
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Registry *providers.Registry
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Limiters *recon.LimiterRegistry
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Client *Client
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}
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var _ recon.ReconSource = (*EnvLeakSource)(nil)
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func (s *EnvLeakSource) Name() string { return "dotenv" }
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func (s *EnvLeakSource) RateLimit() rate.Limit { return rate.Every(2 * time.Second) }
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func (s *EnvLeakSource) Burst() int { return 2 }
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func (s *EnvLeakSource) RespectsRobots() bool { return true }
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func (s *EnvLeakSource) Enabled(_ recon.Config) bool { return true }
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// envKeyValuePattern matches KEY=VALUE lines typical of .env files.
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var envKeyValuePattern = regexp.MustCompile(`(?im)^[A-Z_]*(API[_]?KEY|SECRET|TOKEN|PASSWORD|CREDENTIALS?)[A-Z_]*\s*=\s*\S+`)
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// envFilePaths are common locations for exposed .env files.
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var envFilePaths = []string{
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"/.env",
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"/.env.local",
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"/.env.production",
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"/.env.development",
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"/.env.backup",
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"/.env.example",
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"/app/.env",
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"/api/.env",
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}
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func (s *EnvLeakSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
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base := s.BaseURL
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if base == "" {
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return nil
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}
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client := s.Client
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if client == nil {
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client = NewClient()
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}
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queries := BuildQueries(s.Registry, "dotenv")
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if len(queries) == 0 {
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return nil
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}
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for _, q := range queries {
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if err := ctx.Err(); err != nil {
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return err
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}
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for _, path := range envFilePaths {
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if err := ctx.Err(); err != nil {
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return err
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}
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if s.Limiters != nil {
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if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
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return err
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}
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}
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probeURL := fmt.Sprintf("%s%s", base, path)
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, probeURL, nil)
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if err != nil {
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continue
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}
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resp, err := client.Do(ctx, req)
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if err != nil {
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continue
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}
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body, err := io.ReadAll(io.LimitReader(resp.Body, 64*1024)) // 64KB max
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_ = resp.Body.Close()
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if err != nil {
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continue
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}
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if envKeyValuePattern.Match(body) {
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out <- recon.Finding{
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ProviderName: q,
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Source: probeURL,
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SourceType: "recon:dotenv",
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Confidence: "high",
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DetectedAt: time.Now(),
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}
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}
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}
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}
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return nil
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}
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