CVE-2018-1000170 Cross-site Scripting in Jenkins Core

Medium 5.4 Published Updated

Attackers with job configuration permissions can inject JavaScript into item names, executing code in other users' browsers during UI interactions.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2018-1000170?

CVE-2018-1000170 is a medium-severity cross-site scripting vulnerability in Jenkins Jenkins, published on 13 Apr 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A cross-site scripting vulnerability exists in Jenkins 2.115 and older, LTS 2.107.1 and older, in confirmationList.jelly and stopButton.jelly that allows attackers with Job/Configure and/or Job/Create permission to create an item name containing JavaScript that would be executed in another user's browser when that other user performs some UI actions.

Weakness: CWE-79

Which versions are affected by CVE-2018-1000170?

4 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core. It affects 1 product.

PackageAffectedFixed in
org.jenkins-ci.main:jenkins-core MavenAll versions2.107.2
org.jenkins-ci.main:jenkins-core MavenAll versions2.107.2
org.jenkins-ci.main:jenkins-core MavenFrom 2.1082.116
org.jenkins-ci.main:jenkins-core MavenFrom 2.1082.116

Products include Jenkins Jenkins.

How do I fix CVE-2018-1000170?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.107.2 or 2.116.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2018-1000170 being exploited?

There is no known exploitation of CVE-2018-1000170 in the wild and no public exploit code.

All Jenkins Jenkins vulnerabilities

Sources

Also known as GHSA-9jcv-v4jp-w3cq.

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