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.
:heavy_check_mark: This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.
CVE-2021-33037 - Medium Severity Vulnerability
Vulnerable Library - tomcat-embed-core-9.0.14.jar
Core Tomcat implementation
Path to dependency file: /pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.14/tomcat-embed-core-9.0.14.jar
Dependency Hierarchy: - spring-boot-starter-web-2.1.2.RELEASE.jar (Root Library) - spring-boot-starter-tomcat-2.1.2.RELEASE.jar - :x: **tomcat-embed-core-9.0.14.jar** (Vulnerable Library)
Found in HEAD commit: 4375f9aa860568c03b3d5b43168fea5c6c8add7d
Vulnerability Details
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.
Publish Date: 2021-07-12
URL: CVE-2021-33037
CVSS 3 Score Details (5.3)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: Low - Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3E
Release Date: 2021-07-12
Fix Resolution: org.apache.tomcat:tomcat-coyote:8.5.68, 9.0.48, 10.0.7, org.apache.tomcat.embed:tomcat-embed-core:8.5.68, 9.0.48, 10.0.7
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