CVE-2018-7254
📋 TL;DR
This vulnerability in WavPack 5.1.0 allows attackers to cause denial-of-service or potentially execute arbitrary code by tricking users into opening malicious CAF audio files. It affects any system running vulnerable versions of WavPack that processes untrusted CAF files. The buffer over-read can lead to crashes or memory corruption.
💻 Affected Systems
- WavPack
📦 What is this software?
Wavpack by Wavpack
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if buffer overflow is successfully exploited
Likely Case
Application crash causing denial-of-service when processing malicious CAF files
If Mitigated
Limited impact with proper file validation and sandboxing in place
🎯 Exploit Status
Exploitation requires user to open malicious CAF file. Public proof-of-concept demonstrates crash/DoS. Full RCE exploitation would require additional memory manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 8e3fe45a7bac31d9a3b558ae0079e2d92a04799e and later releases
Vendor Advisory: https://github.com/dbry/WavPack/commit/8e3fe45a7bac31d9a3b558ae0079e2d92a04799e
Restart Required: No
Instructions:
1. Update WavPack to version after commit 8e3fe45a7bac31d9a3b558ae0079e2d92a04799e
2. Recompile any applications using WavPack library
3. Replace vulnerable binary with patched version
🔧 Temporary Workarounds
Disable CAF file processing
allConfigure applications to reject CAF files or disable WavPack CAF support
# Application-specific configuration required
File type validation
linuxImplement strict file validation before processing with WavPack
# Use file command to verify file types:
file --mime-type input.caf
🧯 If You Can't Patch
- Implement strict input validation for all CAF files before processing
- Run WavPack in sandboxed/containerized environment with limited permissions
🔍 How to Verify
Check if Vulnerable:
Check WavPack version: wavpack --version | grep '5.1.0'Check Version:
wavpack --versionVerify Fix Applied:
Verify version is newer than commit 8e3fe45a7bac31d9a3b558ae0079e2d92a04799e or test with known malicious CAF file📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing CAF files
- Segmentation faults in WavPack processes
Network Indicators:
- Unusual CAF file uploads to web services
- Multiple failed audio processing attempts
SIEM Query:
process_name:"wavpack" AND (event_type:"crash" OR exit_code:139)🔗 References
- http://packetstormsecurity.com/files/155743/Slackware-Security-Advisory-wavpack-Updates.html
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889274
- https://github.com/dbry/WavPack/commit/8e3fe45a7bac31d9a3b558ae0079e2d92a04799e
- https://github.com/dbry/WavPack/issues/26
- https://seclists.org/bugtraq/2019/Dec/37
- https://usn.ubuntu.com/3578-1/
- https://www.debian.org/security/2018/dsa-4125
- https://www.exploit-db.com/exploits/44154/
- http://packetstormsecurity.com/files/155743/Slackware-Security-Advisory-wavpack-Updates.html
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889274
- https://github.com/dbry/WavPack/commit/8e3fe45a7bac31d9a3b558ae0079e2d92a04799e
- https://github.com/dbry/WavPack/issues/26
- https://seclists.org/bugtraq/2019/Dec/37
- https://usn.ubuntu.com/3578-1/
- https://www.debian.org/security/2018/dsa-4125
- https://www.exploit-db.com/exploits/44154/
