CVE-2015-7539 Jenkins does not Verify Checksums for Plugin Files

High 7.5 Published Updated

Man-in-the-middle attackers can execute arbitrary code by exploiting missing checksum verification in the Jenkins Plugins Manager.

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

What is CVE-2015-7539?

CVE-2015-7539 is a high-severity code injection vulnerability in Jenkins Jenkins, published on 3 Feb 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The Plugins Manager in Jenkins before 1.640 and LTS before 1.625.2 does not verify checksums for plugin files referenced in update site data, which makes it easier for man-in-the-middle attackers to execute arbitrary code via a crafted plugin.

Weakness: CWE-345

Which versions are affected by CVE-2015-7539?

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 versions1.625.2
org.jenkins-ci.main:jenkins-core MavenAll versions1.625.2
org.jenkins-ci.main:jenkins-core MavenFrom 1.6261.640
org.jenkins-ci.main:jenkins-core MavenFrom 1.6261.640

Products include Jenkins Jenkins, Redhat Openshift.

How do I fix CVE-2015-7539?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 1.625.2 or 1.640.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2015-7539 being exploited?

There is no known exploitation of CVE-2015-7539 in the wild and no public exploit code.

All Jenkins Jenkins vulnerabilities

Sources

Also known as GHSA-x274-9m9r-fm5g.

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