CVE-2021-20574
📋 TL;DR
CVE-2021-20574 is an LDAP injection vulnerability in IBM Security Identity Manager Adapters that allows authenticated attackers to execute malicious LDAP queries. By crafting special requests, attackers could potentially take over other user accounts. This affects organizations using IBM Security Identity Manager Adapters versions 6.0 and 7.0.
💻 Affected Systems
- IBM Security Identity Manager Adapters
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover of administrative or high-privilege accounts, leading to full system compromise and data exfiltration.
Likely Case
Unauthorized access to user accounts, privilege escalation, and potential data manipulation within the identity management system.
If Mitigated
Limited impact with proper input validation and access controls, potentially only affecting low-privilege accounts.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of LDAP injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fix packs as specified in IBM advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/6465875
Restart Required: Yes
Instructions:
1. Review IBM advisory at https://www.ibm.com/support/pages/node/6465875
2. Download and apply the appropriate fix pack for your version
3. Restart affected services
4. Verify the fix is applied
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation for LDAP queries in custom adapters
Access Restriction
allRestrict network access to IBM Security Identity Manager Adapters to trusted IPs only
🧯 If You Can't Patch
- Implement network segmentation to isolate IBM Security Identity Manager systems
- Enforce strong authentication and monitor for suspicious LDAP query patterns
🔍 How to Verify
Check if Vulnerable:
Check IBM Security Identity Manager Adapters version against affected versions (6.0 or 7.0)Check Version:
Check version through IBM Security Identity Manager administration console or product documentationVerify Fix Applied:
Verify that fix packs from IBM advisory have been applied and version is updated📡 Detection & Monitoring
Log Indicators:
- Unusual LDAP query patterns
- Multiple failed authentication attempts followed by successful access
- Account privilege changes from unexpected sources
Network Indicators:
- Unusual LDAP traffic patterns to IBM Security Identity Manager systems
- Multiple authentication requests from single source
SIEM Query:
source="ibm_security_identity_manager" AND (event_type="ldap_query" OR event_type="authentication") AND (query contains special characters like *, (, ), =, &, |)