CVE-2023-51786
📋 TL;DR
This vulnerability in Lustre file systems allows attackers to bypass access controls, potentially escalating privileges and accessing sensitive information. It affects Lustre versions 2.13.x, 2.14.x, and 2.15.x before 2.15.4, impacting organizations using these distributed file systems for high-performance computing.
💻 Affected Systems
- Lustre
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root access, unauthorized access to all data stored on Lustre file systems, and potential lateral movement to connected systems.
Likely Case
Unauthorized access to sensitive files and data stored on Lustre, privilege escalation to gain administrative control over Lustre components.
If Mitigated
Limited impact if proper network segmentation and access controls prevent unauthorized users from reaching Lustre services.
🎯 Exploit Status
Exploitation requires some access to the Lustre system; detailed technical information is available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.15.4
Vendor Advisory: http://lists.lustre.org/pipermail/lustre-announce-lustre.org/2024/000270.html
Restart Required: Yes
Instructions:
1. Download Lustre version 2.15.4 or later from official sources. 2. Stop Lustre services on all affected nodes. 3. Apply the update following Lustre upgrade procedures. 4. Restart Lustre services and verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to Lustre services to only trusted hosts and networks.
iptables -A INPUT -p tcp --dport 988 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 988 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Lustre systems from untrusted networks.
- Enforce least privilege access controls and monitor for unusual access patterns to Lustre services.
🔍 How to Verify
Check if Vulnerable:
Check Lustre version with 'lustre_version' command or examine installed packages; versions 2.13.x, 2.14.x, or 2.15.x below 2.15.4 are vulnerable.Check Version:
lustre_versionVerify Fix Applied:
Verify Lustre version is 2.15.4 or higher using 'lustre_version' command and ensure no unauthorized access attempts are successful.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts in Lustre logs
- Privilege escalation patterns in system logs
- Unexpected file access patterns
Network Indicators:
- Unusual network traffic to Lustre ports (typically 988)
- Connection attempts from unauthorized IP addresses
SIEM Query:
source="lustre.log" AND (event="access_denied" OR event="privilege_escalation")