CVE-2020-21724
📋 TL;DR
A buffer overflow vulnerability in the ExtractorInformation function of oggvideotools allows remote attackers to execute arbitrary code by tricking a user into opening a maliciously crafted OGG file. This affects users and systems running oggvideotools 0.9.1 to process untrusted media files. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- oggvideotools
📦 What is this software?
Ogg Video Tools by Ogg Video Tools Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the user running oggvideotools, potentially leading to full system compromise, data theft, or installation of persistent malware.
Likely Case
Application crash (denial of service) or limited code execution if exploit attempts fail, but remote code execution is possible with a well-crafted exploit.
If Mitigated
No impact if the application is not used to process untrusted files or if proper sandboxing/privilege separation is implemented.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious file. Public proof-of-concept details are available in the references, making weaponization likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check upstream for patches as the project appears inactive; no official patch version is specified in references.
Vendor Advisory: https://sourceforge.net/p/oggvideotools/bugs/9/
Restart Required: No
Instructions:
1. Check for updates from the oggvideotools project or your distribution's repository. 2. If no patch is available, consider removing or disabling oggvideotools. 3. Apply any available security patches from your Linux distribution if they backport fixes.
🔧 Temporary Workarounds
Remove oggvideotools
linuxUninstall oggvideotools to eliminate the vulnerability entirely.
sudo apt remove oggvideotools
sudo yum remove oggvideotools
Restrict file processing
allLimit oggvideotools to only process trusted files by implementing access controls or using it in a sandboxed environment.
🧯 If You Can't Patch
- Isolate systems running oggvideotools from untrusted networks and user access.
- Implement application whitelisting to prevent execution of oggvideotools or monitor for suspicious file processing activities.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of oggvideotools; if it is 0.9.1, the system is vulnerable.Check Version:
oggvideotools --version 2>&1 | head -1Verify Fix Applied:
Verify that oggvideotools is either updated to a patched version or removed from the system.📡 Detection & Monitoring
Log Indicators:
- Application crashes or segmentation faults in oggvideotools logs when processing OGG files.
- Unusual process execution or network connections originating from oggvideotools.
Network Indicators:
- Inbound transfers of OGG files to systems running oggvideotools, especially from untrusted sources.
SIEM Query:
Process: oggvideotools AND (Event: Crash OR Event: Segmentation Fault)🔗 References
- https://github.com/xiaoxiongwang/security/tree/master/oggvideotools#segv-and-heap-overflow-detected-in-line-17-of-streamextractorcpp
- https://sourceforge.net/p/oggvideotools/bugs/9/
- https://github.com/xiaoxiongwang/security/tree/master/oggvideotools#segv-and-heap-overflow-detected-in-line-17-of-streamextractorcpp
- https://sourceforge.net/p/oggvideotools/bugs/9/
