CVE-2024-53379
📋 TL;DR
A heap buffer overflow vulnerability in SharkSSL's server-side handshake implementation allows remote attackers to cause denial-of-service by sending a malformed Client-Hello message. This affects SharkSSL servers running vulnerable versions, potentially disrupting TLS/SSL connections.
💻 Affected Systems
- 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
Remote code execution leading to complete server compromise, though this is less likely given the CWE-120 classification and typical heap overflow constraints.
Likely Case
Denial-of-service causing server crashes or instability, disrupting TLS/SSL services.
If Mitigated
Limited impact with proper network segmentation and monitoring, though service disruption remains possible.
🎯 Exploit Status
Exploitation requires crafting a malformed Client-Hello message during TLS handshake.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after commit 64808a5e12c83b38f85c943dee0112e428dc2a43
Vendor Advisory: https://www.telekom.com/resource/blob/1086326/e6e800ec1e4e675ca0d8fdafab86ea8c/dl-250122-cve-2024-53379-data.pdf
Restart Required: Yes
Instructions:
1. Update SharkSSL to the latest version from Real Time Logic LLC. 2. Restart affected services using SharkSSL. 3. Verify the patch is applied.
🔧 Temporary Workarounds
Network filtering
allBlock or filter malformed TLS Client-Hello messages at network perimeter.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable servers.
- Deploy intrusion detection systems to monitor for exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check SharkSSL version against affected commit range; if running version from commit 64808a5e12c83b38f85c943dee0112e428dc2a43 or later, it is vulnerable.Check Version:
Check SharkSSL documentation or build information for version details.Verify Fix Applied:
Verify SharkSSL version is updated beyond the vulnerable commit and test TLS handshake functionality.📡 Detection & Monitoring
Log Indicators:
- Unexpected server crashes or restarts
- TLS handshake failures with malformed packets
Network Indicators:
- Abnormal TLS Client-Hello packets triggering server instability
SIEM Query:
Search for logs indicating SharkSSL process crashes or TLS handshake anomalies.