CVE-2021-33037
5.3 · MEDIUMOverview
CVE-2021-33037 is a medium-severity vulnerability affecting apache tomcat. It was published on July 12, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.
Remediation
Check the references section for vendor advisories and patches from apache. Update tomcat 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 |
|---|---|---|---|
| apache | tomcat | 8.5.0 | Affected |
| oracle | communications_diameter_signaling_router | 8.0.0.0 | Affected |
| oracle | communications_session_report_manager | 8.0.0 | Affected |
| oracle | communications_session_route_manager | 8.0.0 | Affected |
| oracle | graph_server_and_client | >= 0, < 21.4 | Affected |
| oracle | mysql_enterprise_monitor | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-33037?
CVE-2021-33037 is a medium-severity vulnerability affecting apache tomcat. It was published on July 12, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2021-33037?
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-33037?
Check the references section for vendor advisories and patches from apache. Update tomcat 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-2021-33037?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-33037 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.
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