CVE-2017-6889
📋 TL;DR
This vulnerability in LibRaw-demosaic-pack-GPL2 allows attackers to trigger an integer overflow in the foveon_load_camf() function, leading to heap-based buffer overflow. This can potentially allow remote code execution or denial of service. Users of applications that process Foveon camera RAW images using vulnerable versions of this library are affected.
💻 Affected Systems
- LibRaw-demosaic-pack-GPL2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with system-level privileges, potentially leading to complete system compromise.
Likely Case
Application crash (denial of service) or limited code execution within the application context.
If Mitigated
Application crash with no further impact if proper memory protections (ASLR, DEP) are enabled.
🎯 Exploit Status
Exploitation requires crafting a malicious Foveon RAW image file. The vulnerability is in a widely used image processing library.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.18.2 and later
Vendor Advisory: https://github.com/LibRaw/LibRaw-demosaic-pack-GPL2/commit/194f592e205990ea8fce72b6c571c14350aca716
Restart Required: Yes
Instructions:
1. Update LibRaw-demosaic-pack-GPL2 to version 0.18.2 or later. 2. Rebuild any applications using this library. 3. Restart affected services or applications.
🔧 Temporary Workarounds
Disable Foveon image processing
allConfigure applications to reject or skip processing of Foveon camera RAW images.
Input validation
allImplement strict file type validation and size limits for image uploads.
🧯 If You Can't Patch
- Implement strict file upload restrictions for image files
- Run vulnerable applications with reduced privileges and memory protection controls
🔍 How to Verify
Check if Vulnerable:
Check if LibRaw-demosaic-pack-GPL2 version is below 0.18.2 using package manager or by checking library version.Check Version:
On Linux: dpkg -l | grep libraw-demosaic or rpm -qa | grep LibRawVerify Fix Applied:
Confirm version is 0.18.2 or higher and test with known malicious Foveon RAW images.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing image files
- Memory access violation errors in application logs
Network Indicators:
- Unusual image file uploads to web applications
- Large Foveon RAW file transfers
SIEM Query:
source="application.log" ("segmentation fault" OR "access violation" OR "heap corruption") AND "*.raw" OR "foveon"🔗 References
- https://github.com/LibRaw/LibRaw-demosaic-pack-GPL2/commit/194f592e205990ea8fce72b6c571c14350aca716
- https://secuniaresearch.flexerasoftware.com/advisories/75000/
- https://github.com/LibRaw/LibRaw-demosaic-pack-GPL2/commit/194f592e205990ea8fce72b6c571c14350aca716
- https://secuniaresearch.flexerasoftware.com/advisories/75000/
