CVE-2018-21010
📋 TL;DR
A heap buffer overflow vulnerability in OpenJPEG's color profile processing allows attackers to execute arbitrary code or cause denial of service. This affects applications that process JPEG 2000 images using vulnerable OpenJPEG versions. Any system using OpenJPEG for image processing is potentially vulnerable.
💻 Affected Systems
- OpenJPEG
- Applications using OpenJPEG library
- ImageMagick (when compiled with OpenJPEG)
- GIMP (when using OpenJPEG plugin)
- Various Linux distributions' packages
📦 What is this software?
Openjpeg by Uclouvain
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crash (denial of service) when processing malicious JPEG 2000 images.
If Mitigated
Limited impact with proper sandboxing and memory protection mechanisms in place.
🎯 Exploit Status
Exploitation requires crafting a malicious JPEG 2000 image with specific ICC profile data. The vulnerability is in color.c's color_apply_icc_profile function during image processing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OpenJPEG 2.3.1 and later
Vendor Advisory: https://github.com/uclouvain/openjpeg/commit/2e5ab1d9987831c981ff05862e8ccf1381ed58ea
Restart Required: No
Instructions:
1. Update OpenJPEG to version 2.3.1 or later. 2. For Linux distributions: Use package manager (apt-get update && apt-get upgrade openjpeg2, yum update openjpeg2, etc.). 3. For Windows/macOS: Download updated binaries from official sources. 4. Recompile any applications statically linked to OpenJPEG.
🔧 Temporary Workarounds
Disable JPEG 2000 processing
allTemporarily disable JPEG 2000 image processing in applications until patching is complete.
# Application-specific configuration changes required
Input validation and sanitization
allImplement strict validation of JPEG 2000 images before processing, rejecting files with suspicious ICC profiles.
# Custom application logic required
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy application sandboxing or containerization to limit exploit impact
🔍 How to Verify
Check if Vulnerable:
Check OpenJPEG version: openjp2 --version or dpkg -l | grep openjpeg or rpm -qa | grep openjpegCheck Version:
openjp2 --version 2>/dev/null || echo 'OpenJPEG not found'Verify Fix Applied:
Verify version is 2.3.1 or higher: openjp2 --version | grep -q '2\.3\.[1-9]\|2\.[4-9]\|3\.' && echo 'Patched'📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults in color.c
- Memory corruption errors in application logs
- Unusual image processing failures
Network Indicators:
- Unusual JPEG 2000 image uploads to web applications
- Suspicious image processing requests
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "heap overflow" OR "color.c")🔗 References
- https://github.com/uclouvain/openjpeg/commit/2e5ab1d9987831c981ff05862e8ccf1381ed58ea
- https://lists.debian.org/debian-lts-announce/2019/10/msg00009.html
- https://security.gentoo.org/glsa/202101-29
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://github.com/uclouvain/openjpeg/commit/2e5ab1d9987831c981ff05862e8ccf1381ed58ea
- https://lists.debian.org/debian-lts-announce/2019/10/msg00009.html
- https://security.gentoo.org/glsa/202101-29
- https://www.oracle.com//security-alerts/cpujul2021.html
