CVE-2023-43498 Jenkins temporary uploaded file created with insecure permissions

What is CVE-2023-43498?

CVE-2023-43498 is a high-severity vulnerability in Jenkins Jenkins, published on 20 Sep 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Jenkins 2.423 and earlier, LTS 2.414.1 and earlier, processing file uploads using MultipartFormDataParser creates temporary files in the default system temporary directory with the default permissions for newly created files, potentially allowing attackers with access to the Jenkins controller file system to read and write the files before they are used.

Weakness: CWE-377

Which versions are affected by CVE-2023-43498?

5 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-2023-43498?

Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.424 or 2.414.2.

Is CVE-2023-43498 being exploited?

There is no known exploitation of CVE-2023-43498 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-2023-43498, GHSA-hq87-h4jg-vxfw.