CVE-2020-3777
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Adobe Photoshop that could allow attackers to read sensitive memory content. Affected users include anyone running Photoshop CC 2019 versions 20.0.8 and earlier, or Photoshop 2020 versions 21.1 and earlier. Successful exploitation could lead to information disclosure.
💻 Affected Systems
- Adobe Photoshop CC 2019
- Adobe Photoshop 2020
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read sensitive memory contents, potentially exposing passwords, encryption keys, or other confidential data from Photoshop's memory space.
Likely Case
Information disclosure of Photoshop's internal memory structures, which could aid in developing further attacks or expose limited sensitive data.
If Mitigated
With proper controls, the impact is limited to information disclosure without code execution or system compromise.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file) and is limited to information disclosure rather than code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Photoshop CC 2019: 20.0.9 or later; Photoshop 2020: 21.1.1 or later
Vendor Advisory: https://helpx.adobe.com/security/products/photoshop/apsb20-14.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud desktop app. 2. Navigate to 'Apps' tab. 3. Find Photoshop and click 'Update'. 4. Restart Photoshop after update completes.
🔧 Temporary Workarounds
Restrict file opening
allOnly open Photoshop files from trusted sources and avoid opening unexpected files.
🧯 If You Can't Patch
- Restrict Photoshop usage to trusted users only
- Implement application whitelisting to prevent unauthorized Photoshop execution
🔍 How to Verify
Check if Vulnerable:
Check Photoshop version via Help > About Photoshop. If version is Photoshop CC 2019 20.0.8 or earlier, or Photoshop 2020 21.1 or earlier, you are vulnerable.Check Version:
Photoshop: Help > About PhotoshopVerify Fix Applied:
Verify Photoshop version is 20.0.9 or later for CC 2019, or 21.1.1 or later for Photoshop 2020.📡 Detection & Monitoring
Log Indicators:
- Photoshop crash logs showing memory access violations
- Unexpected file opening events in Photoshop
Network Indicators:
- No direct network indicators as this is a local file-based vulnerability
SIEM Query:
EventID=1000 OR EventID=1001 AND ProcessName="Photoshop.exe" AND ExceptionCode="0xc0000005"