CVE-2022-45101
📋 TL;DR
CVE-2022-45101 is an improper privilege handling vulnerability in Dell PowerScale OneFS NFS implementation. Remote unauthenticated attackers can exploit this to gain unauthorized access, potentially leading to information disclosure and remote code execution. This affects Dell PowerScale OneFS versions 9.0.0.x through 9.4.0.x.
💻 Affected Systems
- Dell PowerScale OneFS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker gains full system compromise, executes arbitrary code, and exfiltrates sensitive data from the PowerScale cluster.
Likely Case
Unauthorized access to NFS shares, information disclosure of sensitive files, and potential privilege escalation within the OneFS environment.
If Mitigated
Limited impact with proper network segmentation, NFS access controls, and monitoring in place.
🎯 Exploit Status
Exploitation requires network access to NFS services. No public exploit code has been observed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OneFS 9.4.0.5 and later
Vendor Advisory: https://www.dell.com/support/kbdoc/en-us/000206357/dell-emc-powerscale-onefs-security-updates-for-multiple-security-vulnerabilities
Restart Required: Yes
Instructions:
1. Download the appropriate OneFS patch from Dell Support. 2. Apply the patch following Dell's upgrade procedures. 3. Reboot the PowerScale cluster as required by the update process.
🔧 Temporary Workarounds
Disable NFS if not required
linuxTemporarily disable NFS services to eliminate the attack vector
isi nfs disable
Restrict NFS access
linuxUse firewall rules to limit NFS access to trusted networks only
isi network firewall rules add --action=allow --protocol=tcp --port=2049 --source=TRUSTED_NETWORK
🧯 If You Can't Patch
- Implement strict network segmentation to isolate PowerScale clusters from untrusted networks
- Enable detailed logging and monitoring of NFS access attempts and implement alerting for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check OneFS version with 'isi version' command. If version is between 9.0.0.0 and 9.4.0.4 inclusive, the system is vulnerable.Check Version:
isi versionVerify Fix Applied:
Verify OneFS version is 9.4.0.5 or later using 'isi version' command.📡 Detection & Monitoring
Log Indicators:
- Unusual NFS access patterns from unexpected sources
- Failed authentication attempts followed by successful NFS operations
- Unexpected process execution from NFS-related services
Network Indicators:
- Unusual traffic to NFS port 2049 from external sources
- Multiple connection attempts to NFS from single IP addresses
SIEM Query:
source="powerscale_logs" AND (event_type="nfs_access" AND src_ip NOT IN [trusted_networks]) OR (process_execution AND parent_process="nfsd")