CVE-2023-43887
📋 TL;DR
CVE-2023-43887 is a buffer overflow vulnerability in Libde265 v1.0.12's pic_parameter_set::dump function, triggered by malicious num_tile_columns and num_tile_row parameters. This allows attackers to execute arbitrary code or cause denial of service. Affected systems include any software using vulnerable Libde265 versions for HEVC/H.265 video decoding.
💻 Affected Systems
- Libde265
- Software using Libde265 library (media players, video editors, web applications)
📦 What is this software?
Libde265 by Struktur
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash causing denial of service, potentially leading to service disruption.
If Mitigated
Contained crash within sandboxed process with minimal impact.
🎯 Exploit Status
Exploitation requires crafting malicious HEVC video files. No public exploit code is known as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Libde265 v1.0.13 or later
Vendor Advisory: https://github.com/strukturag/libde265/commit/63b596c915977f038eafd7647d1db25488a8c133
Restart Required: Yes
Instructions:
1. Update Libde265 to v1.0.13 or later. 2. Rebuild applications using the library. 3. Restart affected services.
🔧 Temporary Workarounds
Disable HEVC processing
allTemporarily disable HEVC/H.265 video processing in applications using Libde265.
Application-specific configuration changes required
Input validation
allImplement strict validation of HEVC video files before processing.
Implement file validation in application code
🧯 If You Can't Patch
- Network segmentation to isolate systems processing untrusted video files
- Implement application sandboxing to limit exploit impact
🔍 How to Verify
Check if Vulnerable:
Check Libde265 version: `libde265 --version` or check package manager. Version 1.0.12 or earlier is vulnerable.Check Version:
libde265 --version 2>/dev/null || dpkg -l | grep libde265 || rpm -qa | grep libde265Verify Fix Applied:
Confirm Libde265 version is 1.0.13 or later: `libde265 --version`📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Memory corruption errors in application logs
Network Indicators:
- Unusual HEVC file uploads to media processing services
SIEM Query:
Application:libde265 AND (EventType:Crash OR Error:segmentation)🔗 References
- https://github.com/strukturag/libde265/commit/63b596c915977f038eafd7647d1db25488a8c133
- https://github.com/strukturag/libde265/issues/418
- https://lists.debian.org/debian-lts-announce/2023/11/msg00032.html
- https://github.com/strukturag/libde265/commit/63b596c915977f038eafd7647d1db25488a8c133
- https://github.com/strukturag/libde265/issues/418
- https://lists.debian.org/debian-lts-announce/2023/11/msg00032.html
