CVE-2021-36075
📋 TL;DR
CVE-2021-36075 is a buffer overflow vulnerability in Adobe Bridge that allows arbitrary code execution when a user opens a malicious Bridge file. Attackers can exploit this to run code with the current user's privileges. All users of Adobe Bridge version 11.1 and earlier are affected.
💻 Affected Systems
- Adobe Bridge
📦 What is this software?
Bridge by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer and potentially moving laterally within the network.
Likely Case
Local privilege escalation leading to data theft, ransomware deployment, or persistence establishment on the compromised system.
If Mitigated
Limited impact if user awareness training prevents opening suspicious files and endpoint protection blocks malicious payloads.
🎯 Exploit Status
Requires user interaction (opening malicious file) and buffer overflow exploitation knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Adobe Bridge 11.1.1
Vendor Advisory: https://helpx.adobe.com/security/products/bridge/apsb21-69.html
Restart Required: Yes
Instructions:
1. Open Adobe Bridge. 2. Go to Help > Updates. 3. Install Bridge 11.1.1 update. 4. Restart Bridge after installation.
🔧 Temporary Workarounds
Disable Bridge file associations
allPrevent Bridge from automatically opening .BRD files by changing file associations
Windows: Control Panel > Default Programs > Associate a file type or protocol with a program
macOS: Right-click .BRD file > Get Info > Open With > Change
🧯 If You Can't Patch
- Implement application whitelisting to block execution of malicious payloads
- Use endpoint detection and response (EDR) to monitor for suspicious Bridge process behavior
🔍 How to Verify
Check if Vulnerable:
Check Bridge version in Help > About Adobe Bridge. If version is 11.1 or earlier, system is vulnerable.Check Version:
Windows: wmic product where name="Adobe Bridge" get version
macOS: /Applications/Adobe Bridge/Adobe Bridge.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify Bridge version is 11.1.1 or later in Help > About Adobe Bridge.📡 Detection & Monitoring
Log Indicators:
- Unusual Bridge process spawning child processes
- Bridge crashes with memory access violations
- Multiple Bridge instances from same user
Network Indicators:
- Bridge process making unexpected outbound connections after file open
SIEM Query:
process_name:"bridge.exe" AND (process_spawn OR process_crash OR suspicious_network_connection)