CVE-2015-1401
📋 TL;DR
CVE-2015-1401 is an improper authentication vulnerability in the TYPO3 LDAP/SSO authentication extension that allows attackers to bypass authentication and gain unauthorized access to TYPO3 backend systems. This affects TYPO3 installations using the ig_ldap_sso_auth extension version 2.0.0.
💻 Affected Systems
- TYPO3 CMS with ig_ldap_sso_auth extension
📦 What is this software?
Ldap \/ Sso Authentication by Ldap \/ Sso Authentication Project
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of TYPO3 backend with administrative privileges, allowing content manipulation, data theft, and potential server takeover.
Likely Case
Unauthorized access to TYPO3 backend with varying privilege levels depending on LDAP group mappings.
If Mitigated
No impact if extension is disabled or properly patched with authentication enforced.
🎯 Exploit Status
Exploit requires knowledge of valid usernames but no credentials; public exploit details available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Extension version 2.0.1 or later
Vendor Advisory: https://typo3.org/security/advisory/typo3-ext-sa-2015-001/
Restart Required: No
Instructions:
1. Update ig_ldap_sso_auth extension to version 2.0.1 or later via TYPO3 Extension Manager. 2. Clear TYPO3 and PHP caches. 3. Verify authentication is working correctly.
🔧 Temporary Workarounds
Disable LDAP/SSO Extension
allTemporarily disable the vulnerable extension until patching is possible
typo3cms extension:deactivate ig_ldap_sso_auth
Restrict Backend Access
allLimit TYPO3 backend access to trusted IP addresses only
# Add to .htaccess or web server config: Order Deny,Allow\nDeny from all\nAllow from 192.168.1.0/24
🧯 If You Can't Patch
- Disable the ig_ldap_sso_auth extension immediately
- Implement IP-based access controls for TYPO3 backend
🔍 How to Verify
Check if Vulnerable:
Check TYPO3 Extension Manager for ig_ldap_sso_auth version 2.0.0Check Version:
typo3cms extension:list | grep ig_ldap_sso_authVerify Fix Applied:
Confirm extension version is 2.0.1 or later and test LDAP authentication functionality📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful login without valid credentials
- Unusual backend access from unexpected IP addresses
Network Indicators:
- HTTP POST requests to TYPO3 backend login with manipulated authentication parameters
SIEM Query:
source="typo3.log" AND (event="authentication" AND result="success" AND method="LDAP") AND NOT user_agent="expected_browser"🔗 References
- http://www.openwall.com/lists/oss-security/2015/01/11/7
- http://www.openwall.com/lists/oss-security/2015/01/27/31
- http://www.securityfocus.com/bid/71981
- http://www.openwall.com/lists/oss-security/2015/01/11/7
- http://www.openwall.com/lists/oss-security/2015/01/27/31
- http://www.securityfocus.com/bid/71981
