CVE-2024-38513
📋 TL;DR
This vulnerability in GoFiber's session middleware allows attackers to supply their own session_id, enabling session fixation attacks and unauthorized access. All users of GoFiber versions 2 through 2.52.4 are affected if they rely on session presence for security.
💻 Affected Systems
- GoFiber
📦 What is this software?
Fiber by Gofiber
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, administrative privilege escalation, and data exfiltration through session fixation attacks.
Likely Case
Unauthorized access to user accounts, session hijacking, and bypassing authentication controls.
If Mitigated
Limited impact with proper session validation and secure session management practices.
🎯 Exploit Status
Attack requires minimal technical skill - simply supplying a custom session_id parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.52.5
Vendor Advisory: https://github.com/gofiber/fiber/security/advisories/GHSA-98j2-3j3p-fw2v
Restart Required: Yes
Instructions:
1. Update GoFiber dependency to version 2.52.5 or higher. 2. Run 'go get github.com/gofiber/fiber/v2@v2.52.5'. 3. Rebuild and redeploy application. 4. Restart all affected services.
🔧 Temporary Workarounds
Implement server-side session ID validation
allAdd middleware to validate session IDs are generated by server, not supplied by users
// Go code to implement custom session validation middleware
Enforce strict session expiration
allImplement short session timeouts and regular session rotation
// Configure session middleware with short expiration: app.Use(session.New(session.Config{Expiration: 15*time.Minute}))
🧯 If You Can't Patch
- Implement additional validation layer to reject user-supplied session IDs
- Deploy WAF rules to detect and block session fixation attempts
🔍 How to Verify
Check if Vulnerable:
Check GoFiber version in go.mod file or via 'go list -m github.com/gofiber/fiber/v2'Check Version:
go list -m github.com/gofiber/fiber/v2Verify Fix Applied:
Confirm version is 2.52.5 or higher and test that user-supplied session_id parameters are rejected📡 Detection & Monitoring
Log Indicators:
- Multiple session creation attempts with similar IDs
- Session IDs that don't match expected patterns
Network Indicators:
- HTTP requests with custom session_id parameters
- Unusual session establishment patterns
SIEM Query:
source="web_logs" AND (session_id="*" OR param="session_id") AND status="200"🔗 References
- https://github.com/gofiber/fiber/commit/66a881441b27322a331f1b526cf1eb6b3358a4d8
- https://github.com/gofiber/fiber/security/advisories/GHSA-98j2-3j3p-fw2v
- https://github.com/gofiber/fiber/commit/66a881441b27322a331f1b526cf1eb6b3358a4d8
- https://github.com/gofiber/fiber/security/advisories/GHSA-98j2-3j3p-fw2v
