CVE-2024-41858
📋 TL;DR
CVE-2024-41858 is an integer overflow vulnerability in Adobe InCopy that could allow arbitrary code execution when a user opens a malicious file. This affects users of InCopy versions 18.5.2, 19.4 and earlier. Successful exploitation requires user interaction through opening a specially crafted file.
💻 Affected Systems
- Adobe InCopy
📦 What is this software?
Incopy by Adobe
Incopy by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer in the context of the current user.
Likely Case
Malicious actors could execute arbitrary code to install malware, steal data, or establish persistence on affected systems.
If Mitigated
With proper controls, impact is limited to the user account context without privilege escalation.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of the integer overflow condition.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to InCopy version 19.5 or later
Vendor Advisory: https://helpx.adobe.com/security/products/incopy/apsb24-64.html
Restart Required: Yes
Instructions:
1. Open Adobe InCopy. 2. Go to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Restart InCopy after installation completes.
🔧 Temporary Workarounds
Restrict file opening
allConfigure system policies to prevent opening untrusted InCopy files
Application control
allUse application whitelisting to restrict execution of InCopy to trusted locations only
🧯 If You Can't Patch
- Implement strict email filtering to block suspicious attachments
- Educate users about the risks of opening untrusted InCopy files
🔍 How to Verify
Check if Vulnerable:
Check InCopy version via Help > About InCopy. If version is 18.5.2, 19.4 or earlier, system is vulnerable.Check Version:
On Windows: Check Add/Remove Programs for Adobe InCopy version. On macOS: Check Applications folder > Adobe InCopy > Get Info.Verify Fix Applied:
Verify InCopy version is 19.5 or later after applying updates.📡 Detection & Monitoring
Log Indicators:
- Unexpected InCopy crashes
- Suspicious file opening events in application logs
Network Indicators:
- Downloads of InCopy files from untrusted sources
SIEM Query:
source="*incopy*" AND (event="crash" OR event="file_open") AND file_extension="incx" OR file_extension="incp"