CVE-2024-24192
📋 TL;DR
CVE-2024-24192 is a heap overflow vulnerability in robdns that occurs when processing zone files. Attackers can exploit this to execute arbitrary code or crash the DNS server. Anyone running vulnerable versions of robdns is affected.
💻 Affected Systems
- robdns
📦 What is this software?
Robdns by Robertdavidgraham
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, allowing attackers to install malware, steal data, or pivot to other systems.
Likely Case
Denial of service causing DNS service disruption, potentially affecting network resolution and dependent services.
If Mitigated
Limited impact with proper network segmentation and minimal exposure, potentially just service crashes.
🎯 Exploit Status
Exploitation requires sending malicious zone files to the server. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit d76d2e6 or later
Vendor Advisory: https://github.com/robertdavidgraham/robdns/issues/8
Restart Required: Yes
Instructions:
1. Update robdns to commit d76d2e6 or later. 2. Rebuild from source if using source installation. 3. Restart the robdns service.
🔧 Temporary Workarounds
Restrict Zone File Sources
allOnly allow zone file updates from trusted sources and implement strict validation of zone file content.
Network Segmentation
allPlace robdns servers behind firewalls and restrict access to zone update ports.
🧯 If You Can't Patch
- Implement strict network controls to limit who can send zone files to the server
- Monitor for abnormal DNS traffic patterns and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check robdns version or commit hash. If using source, verify commit is before d76d2e6.Check Version:
robdns --version or check git commit hash if built from sourceVerify Fix Applied:
Confirm robdns is running commit d76d2e6 or later and test with valid zone files.📡 Detection & Monitoring
Log Indicators:
- Unexpected crashes or restarts of robdns
- Errors related to zone file parsing or memory allocation
Network Indicators:
- Unusual zone transfer requests
- Large or malformed DNS zone updates
SIEM Query:
source="robdns" AND (error OR crash OR "heap overflow")