CVE-2015-8366
📋 TL;DR
This is a critical memory corruption vulnerability in LibRaw's smal_decode_segment function caused by improper array index validation. Attackers can exploit this to cause denial of service, memory corruption, or potentially execute arbitrary code by providing specially crafted image files. Any application using vulnerable versions of LibRaw for processing RAW image files is affected.
💻 Affected Systems
- LibRaw
- Applications using LibRaw library (e.g., image editors, viewers, converters)
📦 What is this software?
Libraw by Libraw
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crashes (denial of service) or memory corruption leading to unstable behavior.
If Mitigated
Application crashes without code execution if memory protections (ASLR, DEP) are effective.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available. Exploitation requires only a malicious image file to be processed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: LibRaw 0.17.1 and later
Vendor Advisory: http://www.libraw.org/news/libraw-0-17-1
Restart Required: No
Instructions:
1. Download LibRaw 0.17.1 or later from libraw.org. 2. Compile and install the updated library. 3. Recompile any applications using LibRaw against the updated library. 4. Restart applications using LibRaw.
🔧 Temporary Workarounds
Disable RAW image processing
allTemporarily disable processing of RAW image formats in applications using LibRaw.
Input validation for image files
allImplement strict file type validation and size limits for uploaded image files.
🧯 If You Can't Patch
- Implement network segmentation to isolate systems using vulnerable LibRaw versions.
- Deploy application allowlisting to prevent execution of unknown or untrusted applications.
🔍 How to Verify
Check if Vulnerable:
Check LibRaw version: `libraw-config --version` or examine application dependencies for LibRaw < 0.17.1.Check Version:
libraw-config --versionVerify Fix Applied:
Verify LibRaw version is 0.17.1 or higher: `libraw-config --version | grep -q '^0\.1[7-9]\|^[1-9]' && echo 'Patched'`.📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Memory access violation errors
- Unexpected process termination when processing images
Network Indicators:
- Unusual outbound connections from image processing applications
- Large number of image uploads to web applications
SIEM Query:
EventID=1000 OR EventID=1001 AND SourceName contains 'application_name' AND Message contains 'access violation' OR 'segmentation fault'🔗 References
- http://packetstormsecurity.com/files/134573/LibRaw-0.17-Overflow.html
- http://seclists.org/fulldisclosure/2015/Nov/108
- http://www.libraw.org/news/libraw-0-17-1
- http://packetstormsecurity.com/files/134573/LibRaw-0.17-Overflow.html
- http://seclists.org/fulldisclosure/2015/Nov/108
- http://www.libraw.org/news/libraw-0-17-1
