CVE-2024-31890
📋 TL;DR
This CVE describes a local privilege escalation vulnerability in IBM TCP/IP Connectivity Utilities for i on IBM i 7.3, 7.4, and 7.5. An attacker with command line access to the host operating system can exploit this to gain root privileges. Only IBM i systems running the affected versions with the vulnerable utilities installed are impacted.
💻 Affected Systems
- IBM TCP/IP Connectivity Utilities for i
📦 What is this software?
I by Ibm
⚠️ Risk & Real-World Impact
Worst Case
An attacker with initial access (e.g., via compromised user account) gains full root control of the IBM i operating system, enabling complete system compromise, data theft, persistence, and lateral movement.
Likely Case
Malicious insiders or attackers who have already breached a user account escalate to root privileges to install malware, steal sensitive data, or disrupt operations.
If Mitigated
With strict access controls and monitoring, exploitation is limited to authorized users; impact is contained if detected quickly.
🎯 Exploit Status
Exploitation requires local command line access; no public exploit code is known as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply PTF Group SF99738 Level 11 or later for IBM i 7.3, 7.4, and 7.5 as specified in IBM advisory.
Vendor Advisory: https://www.ibm.com/support/pages/node/7158240
Restart Required: Yes
Instructions:
1. Review IBM advisory for specific PTF details. 2. Apply PTF Group SF99738 Level 11 or higher via IBM i update tools. 3. Restart the system as required.
🔧 Temporary Workarounds
Restrict Command Line Access
allLimit user access to command line interfaces to reduce attack surface.
🧯 If You Can't Patch
- Implement strict least-privilege access controls and monitor for suspicious privilege escalation attempts.
- Isolate affected systems from critical networks and enforce strong authentication for all user accounts.
🔍 How to Verify
Check if Vulnerable:
Check if IBM i version is 7.3, 7.4, or 7.5 and if TCP/IP Connectivity Utilities are installed without the patched PTF.Check Version:
DSPPTF LICPGM(5770TC1) on IBM i command line to check PTF status.Verify Fix Applied:
Verify PTF Group SF99738 Level 11 or later is applied using IBM i PTF management commands.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events in system logs
- Failed or successful attempts to access restricted commands
Network Indicators:
- None specific; this is a local exploit
SIEM Query:
Search for events related to user privilege changes or command execution on IBM i systems.