Vulnerability in Apache Tomcat
CVE-2021-33037
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 prox…
Vulnerability class: HTTP Request Smuggling
EPSS: 0.754 (99.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Apache Tomcat
- Apache Tomee — versions 8.0.6
- Apache Software Foundation Tomcat — versions Apache Tomcat 10 10.0.0-M1 to 10.0.6, Apache Tomcat 9 9.0.0.M1 to 9.0.46, Apache Tomcat 8 8.5.0 to 8.5.66
- Mcafee Epolicy_orchestrator — versions 5.10.0
- Oracle Agile_plm — versions 9.3.6
- Oracle Communications_cloud_native_core_policy — versions 1.14.0
- Oracle Communications_cloud_native_core_service_communication_proxy — versions 1.14.0
- Oracle Communications_diameter_signaling_router
- Oracle Communications_instant_messaging_server — versions 10.0.1.5.0
- Oracle Communications_policy_management — versions 12.5.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (Patch, Third Party Advisory, x_refsource_MISC)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2021-33037?
- CVE-2021-33037 is a medium-severity vulnerability in Apache Tomcat, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 5.3/10. Published 2021-07-12.
- How severe is CVE-2021-33037?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-33037 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.