CVE-2019-16555 Inefficient Regular Expression Complexity in Jenkins Build Failure Analyzer Plugin

Medium 6.5 Published 17 Dec 2019 Updated 5 Aug 2024

Attackers can cause a denial of service in Jenkins by submitting malicious regular expressions that cannot be interrupted during evaluation.

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-2019-16555?

CVE-2019-16555 is a medium-severity denial of service vulnerability in Jenkins Build Failure Analyzer 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 user-supplied regular expression in Jenkins Build Failure Analyzer Plugin 1.24.1 and earlier was processed in a way that wasn't interruptible, allowing attackers to have Jenkins evaluate a regular expression without the ability to interrupt this process.

Weakness: CWE-400

Which versions are affected by CVE-2019-16555?

2 open source packages ship an affected version, including com.sonyericsson.jenkins.plugins.bfa:build-failure-analyzer. It affects 1 product.

Package	Affected	Fixed in
`com.sonyericsson.jenkins.plugins.bfa:build-failure-analyzer` Maven	All versions	`1.24.2`
`com.sonyericsson.jenkins.plugins.bfa:build-failure-analyzer` Maven	All versions	`1.24.2`

Products include Jenkins Build Failure Analyzer.

How do I fix CVE-2019-16555?

Upgrade com.sonyericsson.jenkins.plugins.bfa:build-failure-analyzer to 1.24.2 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-16555 being exploited?

There is no known exploitation of CVE-2019-16555 in the wild and no public exploit code.

Sources

Also known as GHSA-2hhc-f86x-x74f.