GHSA-pvwx-3jx5-24r2

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GHSA-pvwx-3jx5-24r2

Summary: Lack of type validation in agent related REST API in Jenkins

Details: Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node. This allows attackers with Computer/Configure permission to replace a node with one of a different type. Jenkins 2.287, LTS 2.277.2 validates the type of object created and rejects objects of unexpected types.

References: https://nvd.nist.gov/vuln/detail/CVE-2021-21639, https://github.com/jenkinsci/jenkins/commit/84210baed0c866bdee3e59271f98a767a14a5509, https://github.com/jenkinsci/jenkins, https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721, http://www.openwall.com/lists/oss-security/2021/04/07/2