CVE-2020-9484 (High) detected in tomcat-embed-core-9.0.30.jar

[mend-bolt-for-github]

CVE-2020-9484 - High Severity Vulnerability

Vulnerable Library - tomcat-embed-core-9.0.30.jar

Core Tomcat implementation

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

Path to dependency file: /build.gradle

Path to vulnerable library: /root/.gradle/caches/modules-2/files-2.1/org.apache.tomcat.embed/tomcat-embed-core/9.0.30/ad32909314fe2ba02cec036434c0addd19bcc580/tomcat-embed-core-9.0.30.jar,/root/.gradle/caches/modules-2/files-2.1/org.apache.tomcat.embed/tomcat-embed-core/9.0.30/ad32909314fe2ba02cec036434c0addd19bcc580/tomcat-embed-core-9.0.30.jar

Dependency Hierarchy:

• spring-boot-starter-web-2.2.4.RELEASE.jar (Root Library)
  • spring-boot-starter-tomcat-2.2.4.RELEASE.jar
    • ❌ tomcat-embed-core-9.0.30.jar (Vulnerable Library)

Found in base branch: master

Vulnerability Details

When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed.

Publish Date: 2020-05-20

URL: CVE-2020-9484

CVSS 3 Score Details (7.0)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9484

Release Date: 2020-05-20

Fix Resolution (org.apache.tomcat.embed:tomcat-embed-core): 9.0.35

Direct dependency fix Resolution (org.springframework.boot:spring-boot-starter-web): 2.2.8.RELEASE

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