CVE-2017-20001
📋 TL;DR
This vulnerability in the AES encryption module for Drupal allows attackers to decrypt sensitive data protected by the module. It affects Drupal sites using the AES encryption project versions 7.x and 8.x. The module is not covered by Drupal's official security policy, leaving users responsible for their own updates.
💻 Affected Systems
- Drupal AES encryption module
📦 What is this software?
Aes Encryption by Aes Encryption Project
Aes Encryption by Aes Encryption Project
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all encrypted data including passwords, personal information, and sensitive configuration data stored using the vulnerable module.
Likely Case
Exposure of specific encrypted data that attackers target, potentially leading to credential theft or data breaches.
If Mitigated
Limited data exposure if encryption is used for non-critical data only, with proper access controls limiting attack surface.
🎯 Exploit Status
The vulnerability involves insufficient cryptographic protection allowing data decryption. Public details exist in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest version of the AES encryption module
Vendor Advisory: https://www.drupal.org/node/2857028
Restart Required: No
Instructions:
1. Check if AES encryption module is installed. 2. Update to the latest version via Drupal's update mechanism or manual download. 3. Clear Drupal caches. 4. Re-encrypt any data previously encrypted with vulnerable versions.
🔧 Temporary Workarounds
Disable AES encryption module
linuxTemporarily disable the vulnerable module until patching is possible
drush pm-disable aes
Migrate to alternative encryption
allReplace AES encryption module with Drupal's Key module or other secure encryption solutions
🧯 If You Can't Patch
- Isolate systems using the vulnerable module from internet access
- Implement additional network segmentation and monitoring for systems using the module
🔍 How to Verify
Check if Vulnerable:
Check Drupal's module list for AES encryption module version 7.x or 8.xCheck Version:
drush pm-list | grep aesVerify Fix Applied:
Verify module is updated to latest version and no longer appears in vulnerability scans📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to encrypted data
- Multiple failed decryption attempts
Network Indicators:
- Traffic patterns suggesting bulk data extraction
- Requests targeting encryption endpoints
SIEM Query:
source="drupal" AND (module="aes" OR message="decryption")