CVE-2023-25240
📋 TL;DR
CVE-2023-25240 is an improper SameSite attribute vulnerability in pimCore v10.5.15 that allows attackers to bypass SameSite cookie restrictions, potentially leading to Cross-Site Request Forgery (CSRF) attacks. This could enable attackers to execute arbitrary code on affected systems. Organizations running pimCore v10.5.15 are affected.
💻 Affected Systems
- pimCore
📦 What is this software?
Pimcore by Pimcore
⚠️ Risk & Real-World Impact
Worst Case
Attackers could execute arbitrary code with system-level privileges, leading to complete system compromise, data theft, and lateral movement within the network.
Likely Case
Attackers could perform CSRF attacks to execute unauthorized actions in the context of authenticated users, potentially leading to privilege escalation or data manipulation.
If Mitigated
With proper SameSite cookie configurations and CSRF protections, impact would be limited to session hijacking attempts that could be detected and blocked.
🎯 Exploit Status
Exploitation requires the attacker to craft malicious requests that bypass SameSite restrictions, typically requiring user interaction or specific conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.5.16 or later
Vendor Advisory: https://github.com/pimcore/pimcore/releases
Restart Required: Yes
Instructions:
1. Backup your pimCore installation and database. 2. Update to pimCore version 10.5.16 or later. 3. Restart the web server and application services. 4. Verify the update was successful.
🔧 Temporary Workarounds
Configure SameSite Strict Mode
allManually configure SameSite attribute to 'Strict' for all session cookies
Modify application configuration to set session.cookie_samesite = 'Strict'
Implement CSRF Tokens
allAdd CSRF tokens to all state-changing requests as additional protection
Implement CSRF token validation in all POST/PUT/DELETE endpoints
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Monitor for unusual authentication patterns and implement rate limiting on sensitive endpoints
🔍 How to Verify
Check if Vulnerable:
Check if running pimCore version 10.5.15 by examining the application version in admin panel or configuration filesCheck Version:
Check pimCore version in admin interface or via composer show pimcore/pimcoreVerify Fix Applied:
Verify the application version is 10.5.16 or later and test CSRF protections are functioning📡 Detection & Monitoring
Log Indicators:
- Multiple failed CSRF token validations
- Unusual cross-origin requests to sensitive endpoints
- Session hijacking attempts
Network Indicators:
- Cross-site request patterns bypassing SameSite restrictions
- Unexpected POST requests from external domains
SIEM Query:
source="web_server" AND (csrftoken_failure OR samesite_bypass_attempt)🔗 References
- https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/pimcore/pimCore-10.5.15
- https://portswigger.net/web-security/csrf/bypassing-samesite-restrictions
- https://github.com/nu11secur1ty/CVE-nu11secur1ty/tree/main/vendors/pimcore/pimCore-10.5.15
- https://portswigger.net/web-security/csrf/bypassing-samesite-restrictions
