CVE-2025-36097
📋 TL;DR
A stack-based buffer overflow vulnerability in IBM WebSphere Application Server allows attackers to cause denial of service by sending specially crafted requests that consume excessive memory. This affects IBM WebSphere Application Server 9.0 and WebSphere Application Server Liberty versions 17.0.0.3 through 25.0.0.7. Organizations running these versions are vulnerable to service disruption.
💻 Affected Systems
- IBM WebSphere Application Server
- IBM WebSphere Application Server Liberty
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service outage of affected WebSphere servers, potentially affecting critical business applications and causing extended downtime.
Likely Case
Service degradation or temporary unavailability of affected WebSphere instances, requiring restart and causing business disruption.
If Mitigated
Minimal impact with proper network segmentation and request filtering preventing exploitation attempts.
🎯 Exploit Status
The vulnerability requires sending specially crafted requests but does not require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fixes as specified in IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/7239856
Restart Required: Yes
Instructions:
1. Review IBM Security Bulletin for specific fix versions. 2. Apply appropriate fix packs or interim fixes. 3. Restart affected WebSphere servers. 4. Verify successful patch application.
🔧 Temporary Workarounds
Network Filtering
allImplement network-level filtering to block suspicious requests to WebSphere servers
Load Balancer Rules
allConfigure load balancers to detect and block abnormal request patterns
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WebSphere servers from untrusted networks
- Deploy Web Application Firewall (WAF) with rules to detect and block buffer overflow attempts
🔍 How to Verify
Check if Vulnerable:
Check WebSphere version using administrative console or command line: For Liberty: java -jar wlp/bin/productInfo version; For traditional: versionInfo.shCheck Version:
For Liberty: java -jar wlp/bin/productInfo version; For traditional: ./versionInfo.shVerify Fix Applied:
Verify version is updated beyond vulnerable ranges and check IBM fix list for applied APARs📡 Detection & Monitoring
Log Indicators:
- Unusual memory consumption patterns
- Server crashes or restarts
- Stack overflow errors in SystemOut.log
Network Indicators:
- Abnormal request patterns to WebSphere endpoints
- Sudden spikes in memory usage
SIEM Query:
source="websphere" AND ("out of memory" OR "stack overflow" OR "java.lang.StackOverflowError")