CVE-2018-25017
📋 TL;DR
CVE-2018-25017 is a critical heap-based buffer overflow vulnerability in RawSpeed library version 3.1 that allows attackers to execute arbitrary code or cause denial of service. The vulnerability affects any application that uses the vulnerable RawSpeed library for processing RAW image files. Attackers can exploit this by providing specially crafted RAW image files to trigger the overflow in the TableLookUp::setTable function.
💻 Affected Systems
- RawSpeed (librawspeed)
- darktable
- Other applications using RawSpeed library
📦 What is this software?
Rawspeed by Rawspeed
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with SYSTEM/root privileges leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash (denial of service) when processing malicious RAW files, potentially disrupting image processing workflows.
If Mitigated
Application crash contained within sandboxed environment with minimal impact to host system.
🎯 Exploit Status
Proof-of-concept available through OSS-Fuzz reports. Exploitation requires providing a malicious RAW image file to vulnerable application.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit dbe7591e54bad5e6430d38be6bed051582da76b9 and later versions
Vendor Advisory: https://github.com/darktable-org/rawspeed/commit/dbe7591e54bad5e6430d38be6bed051582da76b9
Restart Required: Yes
Instructions:
1. Update RawSpeed library to version after commit dbe7591e54bad5e6430d38be6bed051582da76b9. 2. Rebuild any applications using RawSpeed. 3. Restart affected applications/services.
🔧 Temporary Workarounds
Disable RAW file processing
allTemporarily disable RAW image file processing in affected applications
Application-specific configuration changes required
Input validation
allImplement strict file type validation and size limits for uploaded RAW files
Implement file signature validation before processing
🧯 If You Can't Patch
- Isolate affected systems from untrusted networks and users
- Implement application sandboxing/containerization to limit exploit impact
🔍 How to Verify
Check if Vulnerable:
Check RawSpeed library version: strings /path/to/librawspeed.so | grep 'RawSpeed' or check application's linked library versionCheck Version:
ldd /path/to/application | grep rawspeed && strings /path/to/librawspeed.so | grep -i 'version\|commit'Verify Fix Applied:
Verify RawSpeed version is newer than commit dbe7591e54bad5e6430d38be6bed051582da76b9📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing RAW files
- Memory access violation errors in application logs
- Segmentation faults in system logs
Network Indicators:
- Unusual RAW file uploads to image processing services
- Multiple failed upload attempts with RAW files
SIEM Query:
source="application.log" AND ("segmentation fault" OR "access violation" OR "buffer overflow") AND "raw"🔗 References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5256
- https://github.com/darktable-org/rawspeed/commit/dbe7591e54bad5e6430d38be6bed051582da76b9
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/librawspeed/OSV-2018-227.yaml
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5256
- https://github.com/darktable-org/rawspeed/commit/dbe7591e54bad5e6430d38be6bed051582da76b9
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/librawspeed/OSV-2018-227.yaml
