CVE-2023-5938
📋 TL;DR
This vulnerability allows attackers to perform path traversal attacks via malicious ZIP archives ('zip slip'), enabling arbitrary file overwrites on the target system. Affected systems include Arc software versions that process archives without proper filename validation. An administrator or user who can upload archives to the system is required for exploitation.
💻 Affected Systems
- Arc (specific product name not specified in CVE)
⚠️ 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
Complete system compromise via arbitrary command execution by overwriting critical system files or configuration files.
Likely Case
Data corruption, denial of service, or privilege escalation by overwriting application files or configuration.
If Mitigated
Limited to file corruption in isolated directories if proper access controls and input validation are implemented.
🎯 Exploit Status
Exploitation requires ability to provide malicious archives to the system. The vulnerability is straightforward to exploit once an attacker can upload archives.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://security.nozominetworks.com/NN-2023:16-01
Restart Required: No
Instructions:
1. Check vendor advisory for patch availability. 2. If patch exists, download and apply according to vendor instructions. 3. Validate that archive processing functions now properly validate filenames.
🔧 Temporary Workarounds
Restrict Archive Uploads
allDisable or restrict functionality that allows uploading or processing of ZIP archives from untrusted sources.
Implement Input Validation
allAdd server-side validation to sanitize archive filenames and prevent path traversal sequences.
🧯 If You Can't Patch
- Implement strict access controls to limit who can upload archives to the system.
- Monitor and audit archive processing activities for suspicious patterns.
🔍 How to Verify
Check if Vulnerable:
Test if the system processes ZIP archives containing files with path traversal sequences (e.g., '../../etc/passwd').Check Version:
Check Arc software version using vendor-specific commands or configuration files.Verify Fix Applied:
Verify that attempted path traversal via archive filenames is blocked and logged.📡 Detection & Monitoring
Log Indicators:
- Archive processing errors
- File write attempts to unexpected directories
- Path traversal patterns in filenames
Network Indicators:
- Large archive uploads to vulnerable endpoints
- Unusual archive processing requests
SIEM Query:
source="application_logs" AND (archive_process OR zip_extract) AND (path_traversal OR ../ OR ..\)