CVE-2021-37137
7.5 · HIGHOverview
CVE-2021-37137 is a high-severity vulnerability affecting netty netty. It was published on October 19, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The Snappy frame decoder function doesn't restrict the chunk length which may lead to excessive memory usage. Beside this it also may buffer reserved skippable chunks until the whole chunk was received which may lead to excessive memory usage as well. This vulnerability can be triggered by supplying malicious input that decompresses to a very big size (via a network stream or a file) or by sending a huge skippable chunk.
Remediation
Check the references section for vendor advisories and patches from netty. Update netty to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| netty | netty | >= 0, < 4.1.68 | Affected |
| oracle | banking_apis | 18.1 | Affected |
| oracle | communications_brm_-_elastic_charging_engine | >= 0, < 12.0.0.4.6 | Affected |
| oracle | communications_diameter_signaling_router | 8.0.0.0 | Affected |
| quarkus | quarkus | >= 0, < 2.2.4 | Affected |
References
Frequently Asked Questions
What is CVE-2021-37137?
CVE-2021-37137 is a high-severity vulnerability affecting netty netty. It was published on October 19, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-37137?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-37137?
Check the references section for vendor advisories and patches from netty. Update netty to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-37137?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-37137 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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