CVE-2024-41276
📋 TL;DR
This vulnerability allows attackers to bypass PIN code authentication in Kaiten by exploiting weak request limiting mechanisms. Attackers can brute-force the 6-digit PIN sent via email after login credentials are entered, gaining unauthorized access to the application. All users of Kaiten version 57.131.12 and earlier are affected.
💻 Affected Systems
- Kaiten
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover leading to unauthorized access to sensitive data, privilege escalation, and potential lateral movement within the organization's Kaiten environment.
Likely Case
Unauthorized access to individual user accounts, exposure of sensitive project data, and potential manipulation of Kaiten boards and workflows.
If Mitigated
Limited impact with proper rate limiting and monitoring, potentially only affecting accounts with weak PINs or no additional security controls.
🎯 Exploit Status
Exploitation requires valid login credentials but bypasses the secondary PIN authentication. Public proof-of-concept code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 57.131.13 or later
Vendor Advisory: https://kaiten.ru/
Restart Required: Yes
Instructions:
1. Backup your Kaiten instance
2. Update to version 57.131.13 or later
3. Restart the Kaiten service
4. Verify the update was successful
🔧 Temporary Workarounds
Implement Rate Limiting
allConfigure web application firewall or reverse proxy to limit PIN verification attempts
# Example nginx rate limiting
limit_req_zone $binary_remote_addr zone=pinlimit:10m rate=5r/m;
limit_req zone=pinlimit burst=10 nodelay;
Enable Multi-Factor Authentication
allReplace email PIN with stronger MFA methods like TOTP or hardware tokens
🧯 If You Can't Patch
- Implement network-level rate limiting for PIN verification endpoints
- Monitor authentication logs for brute force patterns and alert on suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check Kaiten version in admin panel or via API. If version is 57.131.12 or earlier, the system is vulnerable.Check Version:
curl -s https://your-kaiten-instance/api/version | grep versionVerify Fix Applied:
Verify version is 57.131.13 or later and test that PIN brute force attempts are properly rate-limited.📡 Detection & Monitoring
Log Indicators:
- Multiple failed PIN verification attempts from same IP/user
- Successful login followed by multiple PIN attempts
- Unusual time patterns in PIN verification requests
Network Indicators:
- High volume of POST requests to /api/auth/verify-pin endpoint
- Requests bypassing normal rate limiting headers
SIEM Query:
source="kaiten" (event="pin_verification_failed" count>10) by src_ip within 5m