CVE-2020-21722
📋 TL;DR
CVE-2020-21722 is a buffer overflow vulnerability in oggvideotools 0.9.1 that allows remote attackers to execute arbitrary code by tricking users into opening a maliciously crafted OGG file. This affects any system running the vulnerable version of oggvideotools, potentially giving attackers full control over the compromised system.
💻 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 full system compromise, allowing attackers to install malware, steal data, or pivot to other systems.
Likely Case
Local privilege escalation or denial of service when users open malicious OGG files from untrusted sources.
If Mitigated
Limited impact if systems are patched, users avoid untrusted files, and proper network segmentation is in place.
🎯 Exploit Status
Proof-of-concept available in GitHub references. Exploitation requires user to open crafted OGG file.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 0.9.2 or later
Vendor Advisory: https://sourceforge.net/p/oggvideotools/bugs/11/
Restart Required: No
Instructions:
1. Check current version with 'oggvideotools --version'. 2. Update via package manager: 'sudo apt update && sudo apt upgrade oggvideotools' (Debian/Ubuntu) or 'sudo yum update oggvideotools' (RHEL/CentOS). 3. Verify update with version check.
🔧 Temporary Workarounds
Remove oggvideotools
linuxUninstall vulnerable software if not needed
sudo apt remove oggvideotools
sudo yum remove oggvideotools
Restrict file processing
linuxLimit oggvideotools execution to trusted users only
sudo chmod 750 /usr/bin/oggvideotools
sudo chown root:trustedgroup /usr/bin/oggvideotools
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of oggvideotools
- Use network segmentation to isolate systems running vulnerable software
🔍 How to Verify
Check if Vulnerable:
Run 'oggvideotools --version' and check if output contains '0.9.1'Check Version:
oggvideotools --versionVerify Fix Applied:
Run 'oggvideotools --version' and confirm version is 0.9.2 or higher📡 Detection & Monitoring
Log Indicators:
- Segmentation faults or abnormal crashes in oggvideotools process logs
- Unusual process execution following oggvideotools crashes
Network Indicators:
- Unexpected outbound connections from systems running oggvideotools
SIEM Query:
process_name:"oggvideotools" AND (event_type:"crash" OR exit_code:139)🔗 References
- https://github.com/xiaoxiongwang/security/tree/master/oggvideotools#segv-and-heap-use-after-free-detected-in-line-17-of-streamextractorcpp
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5E3JKOO7D6Y2SW2TQB5JDVG7I4Y3UFGW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LO6NXK73PNR4KAAHLXAGPWJAPP772IOD/
- https://sourceforge.net/p/oggvideotools/bugs/11/
- https://github.com/xiaoxiongwang/security/tree/master/oggvideotools#segv-and-heap-use-after-free-detected-in-line-17-of-streamextractorcpp
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5E3JKOO7D6Y2SW2TQB5JDVG7I4Y3UFGW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LO6NXK73PNR4KAAHLXAGPWJAPP772IOD/
- https://sourceforge.net/p/oggvideotools/bugs/11/
