Security restrictions bypass in Jenkins Pipeline:Groovy plugin

1) Security restrictions bypass

EUVDB-ID: #VU17913

Risk: Medium

CVSSv4.0: 9.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Green]

CVE-ID: CVE-2019-1003030

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the vulnerable server.

The vulnerability exists in "pom.xml" and "src/mai/java/org/jenkinsci/plugins/workflow/cps/CpsGroovyShell.java" due to an error when parsing, compiling or instantiating a Groovy script. A remote attacker with the ability to control the contents of a pipeline can supply a specially crafted Groovy script, bypass the sandbox protection and execute arbitrary code on the Jenkins master.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected server.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Pipeline: Groovy: 2.0 - 2.63

CPE2.3

• cpe:2.3:a:jenkins:workflow-cps:2.0:*:*:*:*:jenkins:*:*
• cpe:2.3:a:jenkins:workflow-cps:2.1:*:*:*:*:jenkins:*:*
• cpe:2.3:a:jenkins:workflow-cps:2.2:*:*:*:*:jenkins:*:*

External links

https://jenkins.io/security/advisory/2019-03-06/#SECURITY-1336%20(2)

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.