CVE-2016-8745 (High) detected in tomcat-embed-core-8.0.20.jar

[mend-for-github-com]

CVE-2016-8745 - High Severity Vulnerability

Vulnerable Library - tomcat-embed-core-8.0.20.jar

Core Tomcat implementation

Dependency Hierarchy:

• spring-boot-starter-tomcat-1.2.3.RELEASE.jar (Root Library)
  • ❌ tomcat-embed-core-8.0.20.jar (Vulnerable Library)

Found in HEAD commit: 02e23e894c65d5a9ac94fe97a3b06758376ae333

Vulnerability Details

A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.

Publish Date: 2017-08-10

URL: CVE-2016-8745

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: None
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8745

Release Date: 2017-08-10

Fix Resolution: org.apache.tomcat.embed:tomcat-embed-core:9.0.0.M15,8.5.9,8.0.41,7.0.75,org.apache.tomcat:tomcat-coyote:9.0.0.M15,8.5.9,8.0.41,7.0.75