CVE-2024-28139
📋 TL;DR
This CVE allows the www-data user (typically used by web servers) to escalate privileges to root via sudo misconfiguration that permits passwordless execution of the mount command. Systems with this specific sudo configuration are affected, particularly those using ImageAccess software. The vendor has accepted the risk and won't provide fixes.
💻 Affected Systems
- ImageAccess software
⚠️ 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 root compromise leading to complete system takeover, data exfiltration, persistence establishment, and lateral movement across the network.
Likely Case
Privilege escalation from www-data to root, enabling installation of backdoors, modification of system files, and access to sensitive data.
If Mitigated
Limited impact if proper sudo configuration controls and least privilege principles are enforced, restricting www-data's capabilities.
🎯 Exploit Status
Exploitation requires existing www-data access; sudo misconfiguration makes privilege escalation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
No official patch available as vendor has accepted the risk. Implement workarounds instead.
🔧 Temporary Workarounds
Remove sudo mount permission for www-data
linuxEdit sudoers configuration to remove passwordless mount command execution for www-data user
sudo visudo
Remove or comment line: www-data ALL=(ALL) NOPASSWD: /bin/mount
Restrict mount command options
linuxIf www-data needs mount access, restrict to specific safe options only
sudo visudo
Change to: www-data ALL=(ALL) NOPASSWD: /bin/mount -t proc proc /proc
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems
- Enhance monitoring of www-data user activities and sudo command executions
🔍 How to Verify
Check if Vulnerable:
Run: sudo -l -U www-data | grep -i mountCheck Version:
Check ImageAccess version documentation or contact vendorVerify Fix Applied:
After workaround, run: sudo -l -U www-data and verify mount command no longer appears with NOPASSWD📡 Detection & Monitoring
Log Indicators:
- sudo logs showing www-data executing mount command
- unusual root activity following www-data sudo usage
Network Indicators:
- Unexpected outbound connections from affected system after privilege escalation
SIEM Query:
source="sudo" AND user="www-data" AND command="mount"