CVE-2025-31344
📋 TL;DR
A heap-based buffer overflow vulnerability in giflib's gif2rgb utility allows attackers to execute arbitrary code or cause denial of service by processing malicious GIF files. This affects openEuler Linux systems using giflib versions through 5.2.2. The vulnerability is in the gif2rgb.C source file.
💻 Affected Systems
- openEuler giflib
- giflib
⚠️ 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
Remote code execution with the privileges of the gif2rgb process, potentially leading to full system compromise if the process runs with elevated privileges.
Likely Case
Denial of service (application crash) when processing malicious GIF files, potentially disrupting services that use gif2rgb for image conversion.
If Mitigated
Limited to denial of service if proper sandboxing and privilege separation are implemented, with no remote code execution possible.
🎯 Exploit Status
Exploitation requires crafting a malicious GIF file that triggers the buffer overflow. No public exploit code has been identified in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check openEuler security advisory for specific patched version
Vendor Advisory: https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1292
Restart Required: No
Instructions:
1. Update giflib package using your package manager. 2. For openEuler: 'sudo dnf update giflib'. 3. Verify the update installed successfully.
🔧 Temporary Workarounds
Disable or remove gif2rgb
linuxRemove or disable the gif2rgb utility if not required, eliminating the attack surface.
sudo rm /usr/bin/gif2rgb
sudo chmod 000 /usr/bin/gif2rgb
Restrict gif2rgb execution
linuxUse SELinux or AppArmor to restrict gif2rgb execution to trusted users and contexts.
🧯 If You Can't Patch
- Implement strict input validation for GIF files before processing with gif2rgb
- Run gif2rgb in a sandboxed environment with minimal privileges
🔍 How to Verify
Check if Vulnerable:
Check giflib version: 'rpm -q giflib' or 'gif2rgb --version'. If version is 5.2.2 or earlier, system is vulnerable.Check Version:
rpm -q giflibVerify Fix Applied:
After update, verify version is newer than 5.2.2: 'rpm -q giflib' should show updated version.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from gif2rgb process
- Unexpected termination of services using gif2rgb
Network Indicators:
- Unusual GIF file uploads to web applications
- Network traffic containing malformed GIF files
SIEM Query:
Process execution: gif2rgb with abnormal exit codes OR File modification: suspicious GIF files in upload directories🔗 References
- https://gitee.com/src-openeuler/giflib/pulls/54
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1292
- http://www.openwall.com/lists/oss-security/2025/04/07/3
- http://www.openwall.com/lists/oss-security/2025/04/07/4
- http://www.openwall.com/lists/oss-security/2025/04/07/5
- http://www.openwall.com/lists/oss-security/2025/04/07/6
- http://www.openwall.com/lists/oss-security/2025/04/08/1
- http://www.openwall.com/lists/oss-security/2025/04/09/5
- http://www.openwall.com/lists/oss-security/2025/04/09/7
- http://www.openwall.com/lists/oss-security/2025/04/10/1
