CVE-2023-27900 Denial of service in Jenkins Core

What is CVE-2023-27900?

CVE-2023-27900 is a high-severity denial of service vulnerability in Jenkins Jenkins, published on 8 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Jenkins 2.393 and earlier, LTS 2.375.3 and earlier uses the Apache Commons FileUpload library without specifying limits for the number of request parts introduced in version 1.5 for CVE-2023-24998 in hudson.util.MultipartFormDataParser, allowing attackers to trigger a denial of service.

Weakness: CWE-770

Which versions are affected by CVE-2023-27900?

7 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core and jenkins. It affects 1 product.

Products include Jenkins Jenkins.

How do I fix CVE-2023-27900?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.375.4, 2.387.1 or 2.394.

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-2023-27900 being exploited?

There is no known exploitation of CVE-2023-27900 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Jenkins

• CVE-2024-23897 Jenkins Command Line Interface (CLI) Path Traversal Exploited Critical 9.8
• CVE-2018-1000861 Jenkins Stapler Web Framework Deserialization of Untrusted Data Exploited Critical 9.8
• CVE-2017-1000353 Jenkins Remote Code Execution Exploited Critical 9.8
• CVE-2015-5317 Jenkins User Interface (UI) Information Disclosure Exploited High 7.5
• CVE-2021-21690 Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins Critical 9.8

All Jenkins Jenkins vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-jenkins-2023-27900, GHSA-frgr-c5f2-8qhh.