CVE-2026-21678
📋 TL;DR
CVE-2026-21678 is a heap-buffer-overflow vulnerability in the IccTagXml() function of iccDEV, a library for ICC color management profiles. It allows attackers to potentially execute arbitrary code or cause denial-of-service by exploiting improper input validation. Users of iccDEV versions prior to 2.3.1.2 are affected.
💻 Affected Systems
- iccDEV
📦 What is this software?
Iccdev by Color
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or malware deployment.
Likely Case
Denial-of-service crashes or application instability due to memory corruption.
If Mitigated
Limited impact with proper input sanitization and memory protections, such as ASLR or DEP.
🎯 Exploit Status
Exploitation requires crafting malicious ICC profile data to trigger the overflow, but no public proof-of-concept is available yet.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.1.2
Vendor Advisory: https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-9rp2-4c6g-hppf
Restart Required: Yes
Instructions:
1. Check current iccDEV version. 2. Update to version 2.3.1.2 via package manager or manual compilation. 3. Restart any services or applications using iccDEV.
🔧 Temporary Workarounds
Input Validation
allImplement strict validation of ICC profile inputs to reject malformed data before processing by iccDEV.
🧯 If You Can't Patch
- Restrict access to iccDEV functions to trusted users and applications only.
- Use memory protection mechanisms like ASLR and DEP to reduce exploit success.
🔍 How to Verify
Check if Vulnerable:
Check if iccDEV version is below 2.3.1.2 using the version check command.Check Version:
iccdev --version or check package manager (e.g., dpkg -l iccdev on Debian).Verify Fix Applied:
Confirm iccDEV version is 2.3.1.2 or higher and test with known safe ICC profiles.📡 Detection & Monitoring
Log Indicators:
- Application crashes or segmentation faults in logs related to iccDEV or color processing.
Network Indicators:
- Unusual network traffic sending ICC profile files to vulnerable services.
SIEM Query:
Search for events where process name contains 'iccdev' and exit code indicates crash (e.g., SIGSEGV).🔗 References
- https://github.com/InternationalColorConsortium/iccDEV/commit/c6c0f1cf45b48db94266132ccda5280a1a33569d
- https://github.com/InternationalColorConsortium/iccDEV/issues/55
- https://github.com/InternationalColorConsortium/iccDEV/pull/219
- https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-9rp2-4c6g-hppf
