CVE-2024-10397
📋 TL;DR
CVE-2024-10397 is a memory corruption vulnerability in OpenAFS client utilities where a malicious AFS server can crash the cache manager or potentially execute arbitrary code on client systems. This affects all OpenAFS clients connecting to untrusted AFS servers. The vulnerability stems from improper bounds checking when processing server responses.
💻 Affected Systems
- OpenAFS
📦 What is this software?
Openafs by Openafs
Openafs by Openafs
Openafs by Openafs
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution on client systems, allowing attackers to gain full control of affected machines when connecting to a malicious AFS server.
Likely Case
Denial of service through client crashes, disrupting AFS file access and potentially affecting system stability.
If Mitigated
Limited to denial of service if exploit attempts fail or systems have additional memory protection mechanisms.
🎯 Exploit Status
Exploitation requires controlling an AFS server that clients connect to, but no authentication is needed once the malicious server is in the communication path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OpenAFS 1.8.15 and 1.6.35
Vendor Advisory: https://www.openafs.org/pages/security/OPENAFS-SA-2024-003.txt
Restart Required: Yes
Instructions:
1. Download OpenAFS 1.8.15 or 1.6.35 from openafs.org. 2. Stop all AFS services. 3. Install the updated packages. 4. Restart AFS services and reboot systems if kernel modules were updated.
🔧 Temporary Workarounds
Restrict AFS Server Connections
linuxConfigure clients to only connect to trusted AFS servers using access control lists or firewall rules.
iptables -A OUTPUT -p udp --dport 7000:7003 -d trusted_afs_server_ip -j ACCEPT
iptables -A OUTPUT -p udp --dport 7000:7003 -j DROP
🧯 If You Can't Patch
- Implement network segmentation to isolate AFS traffic and prevent connections to untrusted servers.
- Deploy host-based intrusion detection to monitor for crash patterns in OpenAFS processes.
🔍 How to Verify
Check if Vulnerable:
Check OpenAFS version with 'afsversion' or examine package version: 'dpkg -l openafs-client' on Debian/Ubuntu, 'rpm -q openafs' on RHEL.Check Version:
afsversion || dpkg -l openafs-client 2>/dev/null || rpm -q openafs 2>/dev/nullVerify Fix Applied:
Confirm version is 1.8.15 or 1.6.35 or higher using the same commands.📡 Detection & Monitoring
Log Indicators:
- OpenAFS cache manager crashes in system logs
- Segmentation fault errors in /var/log/messages or syslog
Network Indicators:
- Unusual AFS protocol traffic from unexpected servers
- Spike in AFS connection attempts to new IPs
SIEM Query:
source="*syslog*" AND ("OpenAFS" AND ("segmentation fault" OR "crash" OR "SIGSEGV"))