CVE-2019-12310
📋 TL;DR
ExaGrid appliances with vulnerable firmware have a directory traversal vulnerability in the /monitor/data/Upgrade/ endpoint that allows remote attackers to access sensitive logging files. These files contain Base64-encoded administrative credentials, potentially leading to full device compromise. Organizations using ExaGrid appliances with firmware version v4.8.1.1044.P50 are affected.
💻 Affected Systems
- ExaGrid appliances
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full administrative compromise of ExaGrid appliance, allowing attacker to access, modify, or delete backup data, reconfigure the device, or use it as a pivot point into the network.
Likely Case
Attacker extracts administrative credentials and gains unauthorized access to the appliance management interface, potentially compromising backup integrity and confidentiality.
If Mitigated
Limited information disclosure of system logs without credential extraction if proper access controls are implemented.
🎯 Exploit Status
Directory traversal attacks are well-understood and easy to automate. Public disclosure includes technical details sufficient for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Later firmware versions (contact ExaGrid for specific patched version)
Vendor Advisory: https://exagrid.com/exagrid-products/resources/
Restart Required: Yes
Instructions:
1. Contact ExaGrid support for patched firmware version. 2. Backup appliance configuration. 3. Apply firmware update following ExaGrid documentation. 4. Verify update completion and functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to ExaGrid management interfaces to trusted IP addresses only
Web Application Firewall
allDeploy WAF with directory traversal protection rules to block exploitation attempts
🧯 If You Can't Patch
- Isolate ExaGrid appliances on separate network segments with strict firewall rules
- Implement network monitoring and alerting for directory traversal attempts to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check firmware version via ExaGrid web interface or CLI. If version is v4.8.1.1044.P50, device is vulnerable.Check Version:
Check via ExaGrid web interface under System > About, or consult ExaGrid documentation for CLI commandsVerify Fix Applied:
Verify firmware version has been updated to a version later than v4.8.1.1044.P50 and test that directory traversal to /monitor/data/Upgrade/ no longer works.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing directory traversal sequences (../) to /monitor/data/Upgrade/
- Unauthorized access attempts to sensitive system files
Network Indicators:
- HTTP requests with ../ patterns in URL parameters or paths
- Unusual access patterns to ExaGrid management interfaces
SIEM Query:
http.url:"/monitor/data/Upgrade/*" AND (http.uri:"*../*" OR http.uri:"*..%2f*")🔗 References
- https://exagrid.com/exagrid-products/resources/
- https://www.inquisitllc.com/exagrid-directory-traversal-vulnerability-to-support-credential-extraction/
- https://exagrid.com/exagrid-products/resources/
- https://www.inquisitllc.com/exagrid-directory-traversal-vulnerability-to-support-credential-extraction/
