CVE-2023-25861
📋 TL;DR
CVE-2023-25861 is an out-of-bounds write vulnerability in Adobe Illustrator that could allow arbitrary code execution when a user opens a malicious file. This affects Illustrator versions 26.5.2 and earlier, and 27.2.0 and earlier. Attackers could gain control of the affected system with the privileges of the current user.
💻 Affected Systems
- Adobe Illustrator
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation leading to data exfiltration or malware installation on the affected workstation.
If Mitigated
Limited impact if user has minimal privileges and system has application sandboxing or other exploit mitigations.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Illustrator 26.5.3 and 27.3.0
Vendor Advisory: https://helpx.adobe.com/security/products/illustrator/apsb23-19.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' section. 3. Find Adobe Illustrator and click 'Update'. 4. Restart Illustrator after update completes.
🔧 Temporary Workarounds
Disable Illustrator file opening
allTemporarily disable Illustrator from opening files until patched
Use application control
allBlock Illustrator from executing untrusted files via application whitelisting
🧯 If You Can't Patch
- Restrict user privileges to limit potential damage from exploitation
- Implement email filtering to block malicious Illustrator files and educate users about file opening risks
🔍 How to Verify
Check if Vulnerable:
Check Illustrator version via Help > About Illustrator. If version is 26.5.2 or earlier, or 27.2.0 or earlier, system is vulnerable.Check Version:
On Windows: Get-ItemProperty 'HKLM:\SOFTWARE\Adobe\Illustrator\*' | Select-Object Version. On macOS: /Applications/Adobe\ Illustrator\ */Adobe\ Illustrator.app/Contents/Info.plistVerify Fix Applied:
Verify Illustrator version is 26.5.3 or higher for version 26.x, or 27.3.0 or higher for version 27.x.📡 Detection & Monitoring
Log Indicators:
- Illustrator crash logs with memory access violations
- Unexpected Illustrator process spawning child processes
Network Indicators:
- Illustrator process making unexpected network connections post-file opening
SIEM Query:
process_name:"Illustrator.exe" AND (event_type:process_creation OR event_type:crash)