CVE-2018-1999005 Improper Neutralization of Input During Web Page Generation in Jenkins

Medium 5.4 Published Updated

Attackers with Job/Configure permission can inject JavaScript executed in other users' browsers via the build timeline widget.

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-2018-1999005?

CVE-2018-1999005 is a medium-severity cross-site scripting vulnerability in Jenkins Jenkins, published on 23 Jul 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 2.132 and earlier, 2.121.1 and earlier in BuildTimelineWidget.java, BuildTimelineWidget/control.jelly that allows attackers with Job/Configure permission to define 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-2018-1999005?

4 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core. It affects 2 products.

PackageAffectedFixed in
org.jenkins-ci.main:jenkins-core MavenAll versions2.121.2
org.jenkins-ci.main:jenkins-core MavenAll versions2.121.2
org.jenkins-ci.main:jenkins-core MavenFrom 2.1222.132
org.jenkins-ci.main:jenkins-core MavenFrom 2.1222.132

Products include Jenkins Jenkins, Oracle Communications Cloud Native Core Automated Test Suite.

How do I fix CVE-2018-1999005?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.121.2 or 2.132.

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-2018-1999005 being exploited?

There is no known exploitation of CVE-2018-1999005 in the wild and no public exploit code.

All Jenkins Jenkins vulnerabilities

Sources

Also known as GHSA-pgxv-h967-fw2q.

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