#VU25279 Permissions, Privileges, and Access Controls in Pipeline: Groovy - CVE-2020-2109

Vulnerability identifier: #VU25279

Vulnerability risk: High

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2020-2109

CWE-ID: CWE-264

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Pipeline: Groovy

Software vendor:
Jenkins

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the sandbox protection in the affected plugin can be circumvented through default parameter expressions in CPS-transformed methods. A remote authenticated attacker can specify and run sandboxed Pipelines to execute arbitrary code in the context of the Jenkins master JVM.

Install updates from vendor's website.

• http://www.openwall.com/lists/oss-security/2020/02/12/3
• https://jenkins.io/security/advisory/2020-02-12/#SECURITY-1710