SB2020031132 - Multiple vulnerabilities in Jenkins Cobertura Plugin

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) XML External Entity injection (CVE-ID: CVE-2020-2138)

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote user able to control the input files for the "Publish Cobertura Coverage Report" post-build step can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.

2) Path traversal (CVE-ID: CVE-2020-2139)

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to the affected plugin does not validate file paths from the XML file it parses. A remote authenticated attacker able to control the coverage report content can overwrite any file on the Jenkins master file system.

Remediation

Install update from vendor's website.

References

• http://www.openwall.com/lists/oss-security/2020/03/09/1
• https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1700
• https://jenkins.io/security/advisory/2020-03-09/#SECURITY-1668