CVE-2024-13009
📋 TL;DR
This vulnerability in Eclipse Jetty allows incorrect buffer release during gzip decompression errors, potentially leading to data corruption or unintended data sharing between HTTP requests. It affects Jetty servers handling gzip-compressed request bodies, potentially exposing sensitive information across user sessions.
💻 Affected Systems
- Eclipse Jetty
📦 What is this software?
Jetty by Eclipse
⚠️ Risk & Real-World Impact
Worst Case
Sensitive data from one user's request could be exposed to another user's response, leading to information disclosure or session hijacking.
Likely Case
Data corruption in responses or intermittent information leakage between concurrent requests.
If Mitigated
Limited impact with proper network segmentation and request isolation, though data integrity issues may still occur.
🎯 Exploit Status
Exploitation requires sending malformed gzip-compressed requests to trigger the buffer release error.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.4.57 or later
Vendor Advisory: https://github.com/jetty/jetty.project/security/advisories/GHSA-q4rv-gq96-w7c5
Restart Required: Yes
Instructions:
1. Upgrade Jetty to version 9.4.57 or later. 2. Replace existing Jetty JAR files with patched versions. 3. Restart the Jetty server.
🔧 Temporary Workarounds
Disable gzip request decompression
allPrevent Jetty from decompressing gzip-compressed request bodies
Configure Jetty's GzipHandler to not decompress request bodies or remove GzipHandler entirely
🧯 If You Can't Patch
- Implement network-level filtering to block or sanitize gzip-compressed requests
- Deploy WAF rules to detect and block malformed gzip payloads
🔍 How to Verify
Check if Vulnerable:
Check Jetty version: if between 9.4.0-9.4.56 and gzip request handling is enabled, system is vulnerable.Check Version:
java -jar jetty-home-*.jar --version or check server startup logsVerify Fix Applied:
Verify Jetty version is 9.4.57 or later and test with malformed gzip requests to ensure proper error handling.📡 Detection & Monitoring
Log Indicators:
- Multiple gzip decompression errors in logs
- Unexpected buffer release warnings
- Corrupted response data in access logs
Network Indicators:
- Malformed gzip headers in HTTP requests
- Unusual patterns of gzip-compressed requests
SIEM Query:
source="jetty.logs" AND ("gzip error" OR "buffer release" OR "InflaterInputStream")