Bug 1335415 (CVE-2016-3721) - CVE-2016-3721 jenkins: Arbitrary build parameters are passed to build scripts as environment variables (SECURITY-170)
Summary: CVE-2016-3721 jenkins: Arbitrary build parameters are passed to build scripts...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-3721
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1335427 1349611
Blocks: 1335425
TreeView+ depends on / blocked
 
Reported: 2016-05-12 08:30 UTC by Andrej Nemec
Modified: 2021-02-17 03:53 UTC (History)
17 users (show)

Fixed In Version: Jenkins 2.3, Jenkins 1.651.2
Clone Of:
Environment:
Last Closed: 2016-06-06 19:13:48 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:1206 0 normal SHIPPED_LIVE Moderate: jenkins security update 2016-06-06 23:06:23 UTC
Red Hat Product Errata RHSA-2016:1773 0 normal SHIPPED_LIVE Important: Red Hat OpenShift Enterprise 2.2.10 security, bug fix, and enhancement update 2016-08-24 23:41:18 UTC

Description Andrej Nemec 2016-05-12 08:30:45 UTC 
The following flaw was found in Jenkins:

Build parameters in Jenkins typically are passed to build scripts as environment variables. Some plugins allow passing arbitrary (undeclared) parameters. Depending on access permissions and installed plugins, malicious users were able to trigger builds, passing arbitrary environment variables (e.g. PATH) to modify the behavior of those builds. Rather than expect all plugin authors to be aware of this potential problem, Jenkins now filters the build parameters based on what is defined on the job.

As this change is known to affect a number of plugins, it's possible to restore the previous behavior by setting the system property hudson.model.ParametersAction.keepUndefinedParameters to true. This is potentially very unsafe and intended as a short-term workaround only.

To allow specific, known safe parameter names to be passed to builds, set the system property hudson.model.ParametersAction.safeParameters to a comma-separated list of safe parameter names. Example:


java -Dhudson.model.ParametersAction.safeParameters=FOO,BAR_BAZ,qux -jar jenkins.war


External References:

https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2016-05-11
Comment 1 Andrej Nemec 2016-05-12 08:38:48 UTC 
Created jenkins tracking bugs for this issue:

Affects: fedora-all [bug 1335427]
Comment 2 Fedora Update System 2016-05-21 20:28:02 UTC 
jenkins-1.651.2-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 3 Fedora Update System 2016-05-26 21:52:46 UTC 
jenkins-1.625.3-4.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 4 Fedora Update System 2016-05-26 22:19:17 UTC 
jenkins-1.609.3-7.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 5 errata-xmlrpc 2016-06-06 19:06:42 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Enterprise 3.2
  Red Hat OpenShift Enterprise 3.1

Via RHSA-2016:1206 https://access.redhat.com/errata/RHSA-2016:1206
Comment 7 errata-xmlrpc 2016-08-24 19:45:13 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Enterprise 2.2

Via RHSA-2016:1773 https://rhn.redhat.com/errata/RHSA-2016-1773.html
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