CVE-2021-33037 (Medium) detected in tomcat-embed-core-9.0.41.jar

## CVE-2021-33037 - Medium Severity Vulnerability
Vulnerable Library - tomcat-embed-core-9.0.41.jar

Core Tomcat implementation

Library home page: https://tomcat.apache.org/

Path to dependency file: /easy-abac-demo/pom.xml

Path to vulnerable library: /home/wss-scanner/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.41/tomcat-embed-core-9.0.41.jar

Dependency Hierarchy:
- spring-boot-starter-web-2.4.1.jar (Root Library)
- spring-boot-starter-tomcat-2.4.1.jar
- :x: **tomcat-embed-core-9.0.41.jar** (Vulnerable Library)

Found in base branch: master

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.embed:tomcat-embed-core): 9.0.48

Direct dependency fix Resolution (org.springframework.boot:spring-boot-starter-web): 2.4.8

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