CVE-2024-48075
📋 TL;DR
A heap buffer overflow vulnerability in SharkSSL's TLS server-side handshake implementation allows remote attackers to cause denial-of-service by sending malformed Client Key Exchange messages. This affects servers using SharkSSL from Real Time Logic. The vulnerability is triggered during TLS handshake negotiation.
💻 Affected Systems
- Real Time Logic SharkSSL
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete server crash leading to sustained denial-of-service, potentially requiring manual restart of affected services.
Likely Case
Service disruption causing temporary unavailability of TLS-protected services until automatic or manual recovery.
If Mitigated
Minimal impact with proper network segmentation and monitoring allowing quick detection and response.
🎯 Exploit Status
Exploitation requires sending malformed TLS packets during handshake. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after commit 7045f6f254060640ff77eef2027f108fcc20e2f2
Vendor Advisory: https://github.com/RealTimeLogic/SharkSSL/commit/7045f6f254060640ff77eef2027f108fcc20e2f2
Restart Required: Yes
Instructions:
1. Update SharkSSL to latest version. 2. Recompile applications using SharkSSL. 3. Restart affected services.
🔧 Temporary Workarounds
Network Filtering
allBlock or filter malformed TLS Client Key Exchange messages at network perimeter
Load Balancer Protection
allConfigure load balancers to detect and drop suspicious TLS handshake patterns
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check SharkSSL version and build date. Versions built on or before 09/09/24 are vulnerable.Check Version:
Check application documentation or build information for SharkSSL versionVerify Fix Applied:
Verify SharkSSL version includes commit 7045f6f254060640ff77eef2027f108fcc20e2f2📡 Detection & Monitoring
Log Indicators:
- Unexpected server crashes
- TLS handshake failures
- Memory allocation errors
Network Indicators:
- Malformed TLS Client Key Exchange messages
- Abnormal TLS handshake patterns
SIEM Query:
source="*" ("TLS handshake failed" OR "buffer overflow" OR "segmentation fault") AND process="*sharkssl*"