CVE-2024-31891
📋 TL;DR
This CVE describes a local privilege escalation vulnerability in IBM Storage Scale GUI where an authenticated attacker with command line access to the 'scalemgmt' user can elevate privileges to gain root access on the host operating system. Affected organizations are those running vulnerable versions of IBM Storage Scale GUI with users who have access to the scalemgmt account.
💻 Affected Systems
- IBM Storage Scale GUI
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the host operating system with root privileges, allowing attacker to install persistent backdoors, exfiltrate all data, and pivot to other systems in the environment.
Likely Case
Malicious insider or compromised scalemgmt account escalates to root, gains full control of the Storage Scale system, and potentially accesses sensitive data stored on the platform.
If Mitigated
Limited impact due to strict access controls, monitoring of scalemgmt account activity, and network segmentation preventing lateral movement.
🎯 Exploit Status
Exploitation requires existing access to the scalemgmt user account via command line interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IBM Storage Scale GUI 5.1.9.7 and 5.2.1.2 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7178098
Restart Required: Yes
Instructions:
1. Download the latest IBM Storage Scale GUI version from IBM Fix Central. 2. Follow IBM's upgrade documentation for your specific version. 3. Apply the update to all affected systems. 4. Restart the Storage Scale GUI services.
🔧 Temporary Workarounds
Restrict scalemgmt account access
linuxLimit command line access to the scalemgmt user account to only authorized administrators using strict access controls.
# Review and restrict sudoers file entries for scalemgmt
# Limit SSH access to scalemgmt account
# Implement multi-factor authentication for scalemgmt access
Implement privilege separation
linuxEnsure scalemgmt user has minimal necessary privileges and cannot execute arbitrary commands with elevated permissions.
# Review and harden sudoers configuration
# Remove unnecessary sudo privileges from scalemgmt
# Implement command whitelisting for scalemgmt
🧯 If You Can't Patch
- Implement strict access controls and monitoring for the scalemgmt account, including session logging and alerting on suspicious activity.
- Isolate affected systems in a segmented network zone to limit potential lateral movement if compromised.
🔍 How to Verify
Check if Vulnerable:
Check IBM Storage Scale GUI version using: 'mmlsconfig | grep -i version' or consult IBM documentation for version checking specific to your installation.Check Version:
mmlsconfig | grep -i versionVerify Fix Applied:
Verify version is 5.1.9.7 or higher for 5.1.x branch, or 5.2.1.2 or higher for 5.2.x branch using version check commands.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts from scalemgmt user
- Sudo/su commands from scalemgmt to root
- Unexpected process execution with root privileges
Network Indicators:
- Unusual outbound connections from Storage Scale systems following privilege escalation
SIEM Query:
source="*auth.log*" AND (user="scalemgmt" AND (event="sudo" OR event="su")) OR (process="*" AND user="root" AND parent_user="scalemgmt")