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Date: Tue, 8 Jan 2019 13:46:48 +0100
From: Daniel Beck <ml@...kweb.net>
To: oss-security@...ts.openwall.com
Subject: Sandbox bypass in multiple Jenkins plugins

Jenkins is an open source automation server which enables developers around
the world to reliably build, test, and deploy their software. The following
releases contain fixes for security vulnerabilities:

* Pipeline: Declarative Plugin 1.3.4.1
* Pipeline: Groovy Plugin 2.61.1
* Script Security Plugin 1.50

Summaries of the vulnerabilities are below. More details, severity, and
attribution can be found here:
https://jenkins.io/security/advisory/2019-01-08/

We provide advance notification for security updates on this mailing list:
https://groups.google.com/d/forum/jenkinsci-advisories

If you discover security vulnerabilities in Jenkins, please report them as
described here:
https://jenkins.io/security/#reporting-vulnerabilities

---

SECURITY-1266
Script Security sandbox protection could be circumvented during the 
compilation phase by applying AST transforming annotations such as @Grab
to source code elements.

Both the pipeline validation REST APIs and actual script/pipeline 
execution are affected.

This allowed users with Overall/Read permission, or able to control 
Jenkinsfile or sandboxed Pipeline shared library contents in SCM, to 
bypass the sandbox protection and execute arbitrary code on the Jenkins 
master.

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