In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
: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-2020-1935 - 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: cd0f4c8458f405daaa5f18e4342d4e8479749d18
Vulnerability Details
In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.
Publish Date: 2020-02-24
URL: CVE-2020-1935
CVSS 3 Score Details (4.8)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: Low - Integrity Impact: Low - Availability Impact: None
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://github.com/advisories/GHSA-6v7p-v754-j89v
Release Date: 2020-02-24
Fix Resolution: org.apache.tomcat.embed:tomcat-embed-core:7.0.100,8.5.51,9.0.31;org.apache.tomcat:tomcat-coyote:7.0.100,8.5.51,9.0.31
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