CVE-2023-43496 Jenkins temporary plugin file created with insecure permissions

What is CVE-2023-43496?

CVE-2023-43496 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

Jenkins 2.423 and earlier, LTS 2.414.1 and earlier creates a temporary file in the system temporary directory with the default permissions for newly created files when installing a plugin from a URL, potentially allowing attackers with access to the system temporary directory to replace the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.

Weakness: CWE-276

Which versions are affected by CVE-2023-43496?

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-2023-43496?

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

Is CVE-2023-43496 being exploited?

There is no known exploitation of CVE-2023-43496 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-2023-43496, GHSA-55wp-3pq4-w8p9.