CVE-2024-2223
📋 TL;DR
An incorrect regular expression in Bitdefender GravityZone Update Server allows attackers to perform Server-Side Request Forgery (SSRF) and reconfigure the relay. This affects Bitdefender Endpoint Security for Linux and Windows, and GravityZone Control Center (On Premises). Attackers could potentially redirect updates to malicious servers.
💻 Affected Systems
- Bitdefender Endpoint Security for Linux
- Bitdefender Endpoint Security for Windows
- GravityZone Control Center (On Premises)
📦 What is this software?
Endpoint Security by Bitdefender
Endpoint Security by Bitdefender
⚠️ Risk & Real-World Impact
Worst Case
Attacker reconfigures update server to distribute malicious updates across entire organization, leading to complete endpoint compromise.
Likely Case
Attacker redirects updates to controlled server, potentially delivering malware or stealing sensitive data from endpoints.
If Mitigated
Limited to internal network reconnaissance or minor configuration changes if proper network segmentation exists.
🎯 Exploit Status
Exploitation requires understanding of the vulnerable regular expression and ability to send crafted requests to the update server.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Bitdefender security advisory for specific patched versions
Vendor Advisory: https://www.bitdefender.com/support/security-advisories/incorrect-regular-expression-in-gravityzone-update-server-va-11465/
Restart Required: Yes
Instructions:
1. Review Bitdefender security advisory VA-11465. 2. Update to patched versions of affected products. 3. Restart affected services/systems. 4. Verify update server configuration integrity.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to GravityZone Update Server to only trusted management systems.
Access Control
allImplement strict authentication and authorization controls for update server administration interfaces.
🧯 If You Can't Patch
- Isolate GravityZone Update Server from general network access using firewall rules
- Monitor update server logs for unusual configuration changes or external connection attempts
🔍 How to Verify
Check if Vulnerable:
Check installed versions against affected versions listed in the security advisoryCheck Version:
Linux: bdconfig --version, Windows: Check Bitdefender GUI or registryVerify Fix Applied:
Verify installed version is newer than affected versions and check update server logs for successful patching📡 Detection & Monitoring
Log Indicators:
- Unusual update server configuration changes
- External connection attempts from update server
- Failed authentication attempts to update server
Network Indicators:
- Unexpected outbound connections from update server
- Traffic to non-Bitdefender update servers
SIEM Query:
source="bitdefender-update-server" AND (event_type="config_change" OR dest_ip NOT IN (bitdefender_cdn_ips))