CVE-2024-51123
📋 TL;DR
This vulnerability in Zertificon Z1 SecureMail Gateway allows remote attackers to access sensitive information through the /compose-pdf.xhtml endpoint by manipulating the convid parameter. It affects organizations using Z1 SecureMail Gateway version 4.44.2-7240-debian12. The exposure could include confidential email content or metadata.
💻 Affected Systems
- Zertificon Z1 SecureMail Gateway
⚠️ 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 compromise of sensitive email communications, exposure of confidential business information, and potential regulatory compliance violations.
Likely Case
Unauthorized access to specific email content or metadata through targeted parameter manipulation.
If Mitigated
Limited exposure with proper access controls and monitoring in place, potentially only affecting non-sensitive data.
🎯 Exploit Status
Exploitation requires knowledge of valid conversation IDs (convid) and access to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for updated version
Vendor Advisory: https://github.com/MVRC-ITSEC/CVEs/blob/main/CVE-2024-51123
Restart Required: No
Instructions:
1. Check vendor website for security updates
2. Apply the latest patch for Z1 SecureMail Gateway
3. Verify the patch resolves the vulnerability
🔧 Temporary Workarounds
Restrict Access to Vulnerable Endpoint
allBlock or restrict access to /compose-pdf.xhtml endpoint using web application firewall or network controls.
🧯 If You Can't Patch
- Implement strict access controls to limit who can access the vulnerable endpoint.
- Monitor logs for unusual access patterns to /compose-pdf.xhtml endpoint.
🔍 How to Verify
Check if Vulnerable:
Check if Z1 SecureMail Gateway version is 4.44.2-7240-debian12 and the /compose-pdf.xhtml endpoint is accessible.Check Version:
Check Z1 SecureMail Gateway administration interface or system documentation for version information.Verify Fix Applied:
Verify the system is running a version newer than 4.44.2-7240-debian12 and test the endpoint with controlled parameters.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to /compose-pdf.xhtml
- Multiple failed attempts with different convid parameters
Network Indicators:
- HTTP requests to /compose-pdf.xhtml with manipulated convid parameters
SIEM Query:
source="web_server" AND uri="/compose-pdf.xhtml" AND (convid=* OR parameter_tampering_detected)