CVE-2023-25859
📋 TL;DR
CVE-2023-25859 is an improper input validation vulnerability in Adobe Illustrator that allows arbitrary code execution when a user opens a malicious file. This affects Illustrator users on versions 26.5.2 and earlier, and 27.2.0 and earlier. Successful exploitation requires user interaction but gives attackers full control of the affected system.
💻 Affected Systems
- Adobe Illustrator
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control as the current user, enabling data theft, ransomware deployment, or lateral movement.
Likely Case
Malware installation or data exfiltration through spear-phishing campaigns targeting designers with malicious Illustrator files.
If Mitigated
No impact if users avoid opening untrusted files and systems are properly patched.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code known at advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 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 Illustrator and click 'Update'. 4. Restart Illustrator after update completes.
🔧 Temporary Workarounds
Disable Illustrator file opening
windowsTemporarily block Illustrator from opening files via group policy or application control
Use application sandboxing
allRun Illustrator in sandboxed environment to limit potential damage
🧯 If You Can't Patch
- Implement strict email filtering to block Illustrator files from untrusted sources
- Train users to never open Illustrator files from unknown or untrusted sources
🔍 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: wmic product where name="Adobe Illustrator" get versionVerify 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:
- Unexpected Illustrator crashes
- Suspicious file opens from email attachments
- Unusual process spawning from Illustrator
Network Indicators:
- Outbound connections from Illustrator to unknown IPs
- DNS requests for suspicious domains after file open
SIEM Query:
source="*illustrator*" AND (event="crash" OR event="file_open") AND file_extension="ai"