CVE-2022-34215
📋 TL;DR
Adobe Acrobat Reader versions 22.001.20142 and earlier, 20.005.30334 and earlier, and 17.012.30229 and earlier contain an out-of-bounds read vulnerability when parsing malicious PDF files. An attacker could exploit this to execute arbitrary code in the context of the current user by tricking a victim into opening a crafted file. This affects all users running vulnerable versions of Adobe Acrobat Reader.
💻 Affected Systems
- Adobe Acrobat Reader DC
- Adobe Acrobat Reader
📦 What is this software?
Acrobat by Adobe
Acrobat by Adobe
Acrobat by Adobe
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Limited code execution within the user's context, potentially enabling data exfiltration, credential theft, or installation of additional malware.
If Mitigated
Application crash or denial of service if memory protections prevent successful exploitation.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). The vulnerability is an out-of-bounds read which typically requires additional techniques for reliable code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.001.20169, 20.005.30362, 17.012.30244
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb22-32.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat Reader. 2. Go to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Restart the application. Alternatively, download the latest version from Adobe's website.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allDisabling JavaScript reduces attack surface and may prevent exploitation of some PDF-based vulnerabilities.
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allEnable Protected View for files from potentially unsafe locations to limit damage if malicious files are opened.
Edit > Preferences > Security (Enhanced) > Enable Protected View at startup
🧯 If You Can't Patch
- Restrict PDF file opening to trusted sources only using application whitelisting or policy controls.
- Implement network segmentation to limit lateral movement if exploitation occurs.
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat Reader version via Help > About Adobe Acrobat Reader DC. Compare against affected versions.Check Version:
On Windows: wmic product where name="Adobe Acrobat Reader DC" get versionVerify Fix Applied:
Verify version is 22.001.20169 or higher, 20.005.30362 or higher, or 17.012.30244 or higher.📡 Detection & Monitoring
Log Indicators:
- Application crashes of acrobat.exe or AcroRd32.exe with memory access violation errors
- Unusual process creation from Adobe Reader processes
Network Indicators:
- Unexpected outbound connections from Adobe Reader processes
- Downloads of PDF files from suspicious sources
SIEM Query:
Process Creation where Image contains "acrobat" or "AcroRd32" AND ParentImage contains "explorer" OR CommandLine contains ".pdf"