CVE-2019-16559 Jenkins WebSphere Deployer Plugin missing permission check

Medium 5.4 Published 17 Dec 2019 Updated 5 Aug 2024

Attackers with read permissions can determine file existence on the Jenkins master file system due to missing permission checks in the WebSphere Deployer Plugin.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-16559?

CVE-2019-16559 is a medium-severity missing authorization vulnerability in Jenkins WebSphere Deployer Plugin, published on 17 Dec 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A missing permission check in Jenkins WebSphere Deployer Plugin 1.6.1 and earlier allows attackers with Overall/Read permission to perform connection tests and determine whether files with an attacker-specified path exist on the Jenkins master file system.

Weakness: CWE-276

Which versions are affected by CVE-2019-16559?

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

Package	Affected	Fixed in
`org.jenkins-ci.plugins:websphere-deployer` Maven	All versions to `1.6.1`	None
`org.jenkins-ci.plugins:websphere-deployer` Maven	All versions to `1.6.1`	None

Products include Jenkins Websphere Deployer.

How do I fix CVE-2019-16559?

No fix has been published for CVE-2019-16559 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-16559 being exploited?

There is no known exploitation of CVE-2019-16559 in the wild and no public exploit code.

Sources

Also known as GHSA-mxf8-grm7-mvqw.