CVE-2020-9556
📋 TL;DR
Adobe Bridge versions 10.0.1 and earlier contain an out-of-bounds write vulnerability that could allow attackers to execute arbitrary code on affected systems. This affects users who open malicious files with vulnerable Adobe Bridge installations. Successful exploitation requires user interaction but could lead to full system compromise.
💻 Affected Systems
- Adobe Bridge
📦 What is this software?
Bridge by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover 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 or arbitrary code execution within the context of the Adobe Bridge process, allowing attackers to install malware, steal files, or establish persistence.
If Mitigated
Limited impact due to sandboxing or restricted user privileges, potentially resulting in application crash rather than code execution.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file) and knowledge of memory layout. No public exploits were available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.0.2 or later
Vendor Advisory: https://helpx.adobe.com/security/products/bridge/apsb20-19.html
Restart Required: Yes
Instructions:
1. Open Adobe Bridge. 2. Go to Help > Updates. 3. Install available updates to version 10.0.2 or later. 4. Restart Adobe Bridge after installation.
🔧 Temporary Workarounds
Disable file previews
allPrevent automatic processing of potentially malicious files by disabling thumbnail generation
Edit > Preferences > General > Uncheck 'Generate Monitor-Size Previews' and 'Generate High Quality Previews'
Restrict file types
allConfigure Adobe Bridge to only open trusted file formats
Edit > Preferences > File Type Associations > Remove associations for suspicious file types
🧯 If You Can't Patch
- Restrict user privileges to limit potential damage from successful exploitation
- Implement application whitelisting to prevent execution of unauthorized binaries
🔍 How to Verify
Check if Vulnerable:
Check Adobe Bridge version in Help > About Adobe Bridge. If version is 10.0.1 or earlier, the system is vulnerable.Check Version:
On Windows: wmic product where name="Adobe Bridge" get version
On macOS: /Applications/Adobe Bridge/Adobe Bridge.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify Adobe Bridge version is 10.0.2 or later in Help > About Adobe Bridge.📡 Detection & Monitoring
Log Indicators:
- Adobe Bridge crash logs with memory access violations
- Unexpected child processes spawned from Adobe Bridge
Network Indicators:
- Unexpected outbound connections from Adobe Bridge process
- DNS requests to suspicious domains after file opening
SIEM Query:
process_name:"Adobe Bridge" AND (event_type:crash OR parent_process:"Adobe Bridge")