CVE-2023-26092
📋 TL;DR
CVE-2023-26092 is a server-side template injection vulnerability in Liima that allows attackers to execute arbitrary code on affected servers. This affects all Liima deployments running versions before 1.17.28. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Liima
📦 What is this software?
Liima by Puzzle
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, lateral movement, and persistent backdoor installation.
Likely Case
Remote code execution with application-level privileges, potentially leading to data exfiltration and further system exploitation.
If Mitigated
Limited impact if proper network segmentation, WAF rules, and input validation are in place.
🎯 Exploit Status
Template injection vulnerabilities typically have low exploitation complexity and can be exploited without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.17.28
Vendor Advisory: https://github.com/liimaorg/liima/blob/master/release-changelog.md
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Stop Liima service. 3. Update to version 1.17.28 or later. 4. Restart Liima service. 5. Verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to block template injection patterns
Implement regex filtering for template syntax in user inputs
Network Isolation
linuxRestrict network access to Liima instances
iptables -A INPUT -p tcp --dport [liima_port] -s [trusted_ips] -j ACCEPT
iptables -A INPUT -p tcp --dport [liima_port] -j DROP
🧯 If You Can't Patch
- Implement web application firewall (WAF) with template injection rules
- Disable or restrict Liima access to internal networks only
🔍 How to Verify
Check if Vulnerable:
Check Liima version: if version < 1.17.28, system is vulnerableCheck Version:
Check Liima configuration files or run 'liima --version' if availableVerify Fix Applied:
Verify version is 1.17.28 or later and test template injection attempts are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual template syntax in request logs
- Multiple failed template parsing attempts
- Suspicious file operations from Liima process
Network Indicators:
- Unexpected outbound connections from Liima server
- Traffic patterns indicating code execution
SIEM Query:
source="liima.logs" AND ("template" OR "injection" OR "eval" OR "exec")