CVE-2024-47115
📋 TL;DR
This CVE describes a local privilege escalation vulnerability in IBM AIX and VIOS systems where improper input sanitization allows a local user to execute arbitrary commands with elevated privileges. The vulnerability affects IBM AIX 7.2, 7.3 and VIOS 3.1, 4.1 systems. Attackers with local access can exploit this to gain root-level control of affected systems.
💻 Affected Systems
- IBM AIX
- IBM VIOS
📦 What is this software?
Aix by Ibm
Aix by Ibm
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains full root privileges and complete control over the system, enabling data theft, system destruction, or lateral movement to other systems.
Likely Case
Local user escalates privileges to root and executes arbitrary commands, potentially installing backdoors, modifying system configurations, or accessing sensitive data.
If Mitigated
With proper access controls and monitoring, impact is limited to isolated systems with minimal data exposure.
🎯 Exploit Status
Exploitation requires local user access. The vulnerability is in input sanitization, making exploitation relatively straightforward for attackers with local access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply the security fix from IBM's advisory
Vendor Advisory: https://www.ibm.com/support/pages/node/7178033
Restart Required: Yes
Instructions:
1. Review IBM advisory at provided URL. 2. Download appropriate fix for your AIX/VIOS version. 3. Apply fix using smit or installp command. 4. Reboot system to ensure fix is fully applied.
🔧 Temporary Workarounds
Restrict local user access
aixLimit local user accounts and implement strict access controls to reduce attack surface
chuser login=false username
chuser rlogin=false username
Implement privilege separation
aixUse role-based access control and limit sudo privileges to essential users only
mkuser authorizations=NONE username
chuser roles=username
🧯 If You Can't Patch
- Implement strict access controls and monitor all local user activity
- Isolate affected systems from critical network segments and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check AIX/VIOS version: oslevel -s. If version is AIX 7.2, 7.3 or VIOS 3.1, 4.1 without security fix applied, system is vulnerable.Check Version:
oslevel -sVerify Fix Applied:
Check installed fixes: instfix -i | grep security_fix_number. Verify system has been rebooted after patch installation.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in /var/adm/sulog
- Suspicious command execution by non-privileged users in system logs
- Unexpected changes to system configuration files
Network Indicators:
- Unusual outbound connections from AIX/VIOS systems
- Lateral movement attempts from affected systems
SIEM Query:
source="aix_logs" AND (event_type="privilege_escalation" OR user="*" AND command="sudo" OR command="su")