CVE-2025-2900
📋 TL;DR
A buffer overflow vulnerability in IBM Semeru Runtime's native AES/CBC encryption implementation allows attackers to cause denial of service through application crashes. This affects all systems running vulnerable versions of IBM Semeru Runtime 8, 11, 17, and 21. The vulnerability is triggered when processing specific encryption operations.
💻 Affected Systems
- IBM Semeru Runtime
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through application crashes, potentially affecting multiple applications sharing the runtime environment.
Likely Case
Application instability and crashes when processing AES/CBC encryption operations, leading to service interruptions.
If Mitigated
Limited impact with proper network segmentation and monitoring, though crashes may still occur if exploited.
🎯 Exploit Status
Exploitation requires triggering the vulnerable AES/CBC encryption function, which may require specific application functionality or crafted inputs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 8.0.442.0, 11.0.26.0, 17.0.14.0, and 12.0.6.0
Vendor Advisory: https://www.ibm.com/support/pages/node/7233415
Restart Required: Yes
Instructions:
1. Review IBM advisory for specific fixed versions. 2. Download and install updated IBM Semeru Runtime. 3. Restart all applications using the runtime. 4. Verify applications function correctly post-update.
🔧 Temporary Workarounds
Disable AES/CBC encryption
allIf possible, disable or avoid using AES/CBC encryption in applications until patched.
Application-specific configuration changes required
Network segmentation
allRestrict network access to applications using vulnerable runtime to reduce attack surface.
firewall rules and network ACLs implementation required
🧯 If You Can't Patch
- Implement strict input validation for encryption-related functions
- Monitor application logs for crash patterns and implement automated restart mechanisms
🔍 How to Verify
Check if Vulnerable:
Check IBM Semeru Runtime version using 'java -version' command and compare against affected version ranges.Check Version:
java -version 2>&1 | grep -i 'semeru'Verify Fix Applied:
Verify installed version is above the affected ranges: 8.0.442.0, 11.0.26.0, 17.0.14.0, and 12.0.6.0.📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Stack overflow errors in runtime logs
- Abnormal termination of Java applications
Network Indicators:
- Unusual patterns of encryption-related requests
- Multiple failed encryption operations
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "buffer overflow" OR "SIGSEGV") AND process="java"