CVE-2024-51464
📋 TL;DR
This vulnerability allows authenticated IBM i users to bypass interface restrictions in Navigator for i by sending specially crafted requests. Attackers could perform unauthorized operations that their assigned permissions should prevent. Affects IBM i versions 7.3, 7.4, and 7.5.
💻 Affected Systems
- IBM i Navigator
📦 What is this software?
I by Ibm
I by Ibm
I by Ibm
⚠️ Risk & Real-World Impact
Worst Case
Authenticated attacker gains administrative privileges and performs unauthorized system operations, data manipulation, or configuration changes.
Likely Case
Privilege escalation allowing users to perform operations beyond their assigned role permissions.
If Mitigated
Limited impact due to existing access controls and monitoring catching unusual activity.
🎯 Exploit Status
Requires authenticated access and knowledge of crafting specific requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply IBM i PTF Group SF99730 Level 30 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7179509
Restart Required: Yes
Instructions:
1. Check current PTF level with DSPPTF. 2. Apply PTF Group SF99730 Level 30 or later. 3. Restart affected services or system as required.
🔧 Temporary Workarounds
Restrict Navigator for i Access
allLimit access to Navigator for i interface to only trusted users and networks.
Configure firewall rules to restrict access to Navigator for i ports
Use IBM i network attributes to limit interface access
Implement Least Privilege
allEnsure users have only necessary permissions to reduce impact if exploited.
Use GRTOBJAUT and RVKOBJAUT commands to manage object authorities
Regularly review user profiles with DSPUSRPRF
🧯 If You Can't Patch
- Implement strict network segmentation to isolate IBM i systems
- Enhance monitoring of Navigator for i access logs for unusual patterns
🔍 How to Verify
Check if Vulnerable:
Check IBM i version with WRKACTJOB SBS(QSYSWRK) and verify if running 7.3, 7.4, or 7.5 without required PTFs.Check Version:
DSPPTF LICPGM(5770SS1) or WRKACTJOB SBS(QSYSWRK)Verify Fix Applied:
Verify PTF Group SF99730 Level 30 or later is installed using DSPPTF command.📡 Detection & Monitoring
Log Indicators:
- Unusual Navigator for i access patterns
- Authorization failures followed by successful operations
- User performing operations outside normal role
Network Indicators:
- Suspicious requests to Navigator for i interface
- Traffic patterns indicating privilege escalation attempts
SIEM Query:
source="IBM_i" AND (event_type="authorization_failure" OR event_type="privilege_escalation") AND application="Navigator_for_i"