CVE-2018-1000188 Jenkins CAS Plugin Server-Side Request Forgery vulnerability

Medium 5.4 Published 5 Jun 2018 Updated 17 Sep 2024

Attackers with read access can force Jenkins to send GET requests to arbitrary URLs, potentially accessing internal resources.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-1000188?

CVE-2018-1000188 is a medium-severity server-side request forgery vulnerability in n/a, published on 5 Jun 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A server-side request forgery vulnerability exists in Jenkins CAS Plugin 1.4.1 and older in CasSecurityRealm.java that allows attackers with Overall/Read access to cause Jenkins to send a GET request to a specified URL.

Weakness: CWE-918

Which versions are affected by CVE-2018-1000188?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:cas-plugin. It affects 1 product.

Package	Affected	Fixed in
`org.jenkins-ci.plugins:cas-plugin` Maven	All versions	`1.4.2`
`org.jenkins-ci.plugins:cas-plugin` Maven	All versions	`1.4.2`

Products include Jenkins Cas.

How do I fix CVE-2018-1000188?

Upgrade org.jenkins-ci.plugins:cas-plugin to 1.4.2 or later.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2018-1000188 being exploited?

There is no known exploitation of CVE-2018-1000188 in the wild and no public exploit code.

Sources

Also known as GHSA-f8r7-7hv9-7f43.