CVE-2023-38739
📋 TL;DR
This CSRF vulnerability in IBM Sterling B2B Integrator allows attackers to trick authenticated users into performing unauthorized actions by sending malicious requests. Affected users are those running vulnerable versions of IBM Sterling B2B Integrator who have authenticated sessions.
💻 Affected Systems
- IBM Sterling B2B Integrator
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of B2B integration system allowing data theft, unauthorized transactions, or system configuration changes
Likely Case
Unauthorized data access or modification of B2B transactions and configurations
If Mitigated
Limited impact with proper CSRF protections and user awareness
🎯 Exploit Status
CSRF attacks are well-understood and relatively easy to implement
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply IBM fix pack or upgrade to non-vulnerable version
Vendor Advisory: https://www.ibm.com/support/pages/node/7182004
Restart Required: Yes
Instructions:
1. Review IBM advisory 2. Apply recommended fix pack 3. Restart Sterling B2B Integrator services 4. Verify fix
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF protection tokens to all forms and state-changing requests
SameSite Cookie Attribute
allSet SameSite=Strict or Lax on session cookies
🧯 If You Can't Patch
- Implement web application firewall with CSRF protection rules
- Require re-authentication for sensitive operations
🔍 How to Verify
Check if Vulnerable:
Check IBM Sterling B2B Integrator version against affected rangesCheck Version:
Check version in Sterling B2B Integrator admin console or configuration filesVerify Fix Applied:
Verify version is updated beyond vulnerable ranges and test CSRF protections📡 Detection & Monitoring
Log Indicators:
- Unexpected state changes without corresponding user actions
- Multiple similar requests from different referrers
Network Indicators:
- Requests lacking CSRF tokens
- Requests with suspicious referrer headers
SIEM Query:
web_requests WHERE (app_name='Sterling B2B Integrator' AND csrf_token IS NULL AND method IN ('POST', 'PUT', 'DELETE'))