CVE-2025-11010
📋 TL;DR
A heap-based buffer overflow vulnerability in vstakhov libucl up to version 0.9.2 allows local attackers to potentially execute arbitrary code or cause denial of service. The vulnerability exists in the ucl_include_common function within ucl_util.c. Only systems using vulnerable versions of libucl are affected, requiring local access for exploitation.
💻 Affected Systems
- vstakhov libucl
⚠️ 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
Local privilege escalation leading to full system compromise, arbitrary code execution, or persistent backdoor installation.
Likely Case
Local denial of service (application crash) or limited information disclosure from heap memory.
If Mitigated
Application crash with no privilege escalation if proper sandboxing/containerization is implemented.
🎯 Exploit Status
Proof of concept available in public repository. Exploitation requires local access and ability to trigger the vulnerable function with crafted input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 0.9.2 (check latest release)
Vendor Advisory: https://github.com/vstakhov/libucl/issues/337
Restart Required: No
Instructions:
1. Check current libucl version. 2. Update to latest version from official repository. 3. Recompile any applications using libucl. 4. Restart services using libucl if they were running.
🔧 Temporary Workarounds
Restrict local access
allLimit local user access to systems running vulnerable libucl applications
Sandbox applications
allRun applications using libucl in containers or with reduced privileges
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local users from accessing systems
- Monitor for abnormal application crashes or memory usage patterns
🔍 How to Verify
Check if Vulnerable:
Check libucl version: 'pkg-config --modversion libucl' or check installed package versionCheck Version:
pkg-config --modversion libucl || ucl --version 2>/dev/null || find /usr -name '*libucl*' -type f | head -5Verify Fix Applied:
Verify version is greater than 0.9.2 and test with known safe UCL configuration files📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Abnormal memory usage patterns in libucl processes
Network Indicators:
- None - local exploitation only
SIEM Query:
Process: (libucl OR ucl) AND (EventID: 1000 OR Signal: SIGSEGV)