CVE-2024-27508
📋 TL;DR
Atheme 7.2.12 contains a memory leak vulnerability in its crypto-benchmark component that allows attackers to gradually exhaust system memory through repeated exploitation. This affects systems running vulnerable Atheme IRC services software, potentially leading to denial of service. The vulnerability requires access to the crypto-benchmark functionality.
💻 Affected Systems
- Atheme IRC Services
📦 What is this software?
Atheme by Atheme
⚠️ Risk & Real-World Impact
Worst Case
Complete system memory exhaustion leading to denial of service, service crashes, and potential system instability affecting all IRC services.
Likely Case
Gradual memory consumption causing performance degradation and eventual service disruption requiring manual intervention.
If Mitigated
Minimal impact with proper monitoring and resource limits in place, allowing for detection and remediation before service disruption.
🎯 Exploit Status
Exploitation requires ability to trigger crypto-benchmark operations repeatedly. No public exploit code identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.2.13 or later
Vendor Advisory: https://github.com/atheme/atheme/releases
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download latest Atheme release from official repository. 3. Stop Atheme services. 4. Install updated version following platform-specific build instructions. 5. Restart Atheme services.
🔧 Temporary Workarounds
Disable crypto-benchmark access
allRestrict or disable access to crypto-benchmark functionality to prevent exploitation.
# Configure access controls in atheme.conf to restrict crypto-benchmark operations
# Remove or comment out crypto-benchmark module loading if not required
Implement memory limits
linuxUse OS-level memory limits to contain potential memory exhaustion.
# Linux: Use ulimit or cgroups to limit Atheme process memory
ulimit -v [LIMIT_IN_KB]
# Systemd: MemoryLimit= in service unit file
🧯 If You Can't Patch
- Implement strict access controls to crypto-benchmark functionality
- Deploy monitoring for abnormal memory consumption patterns
🔍 How to Verify
Check if Vulnerable:
Check Atheme version: atheme --version should show 7.2.12. Review if crypto-benchmark module is loaded and accessible.Check Version:
atheme --versionVerify Fix Applied:
Verify version is 7.2.13 or later: atheme --version. Test crypto-benchmark operations while monitoring memory usage.📡 Detection & Monitoring
Log Indicators:
- Repeated crypto-benchmark operations in Atheme logs
- Abnormal memory allocation patterns
- Process restart messages
Network Indicators:
- Increased crypto-benchmark related traffic patterns
SIEM Query:
source="atheme.log" AND "crypto-benchmark" | stats count by src_ip