CVE-2019-1003009: Improper Certificate Validation

May 13, 2022 (updated January 9, 2024)

An improper certificate validation vulnerability exists in Jenkins Active Directory Plugin 2.10 and earlier in src/main/java/hudson/plugins/active_directory/ActiveDirectoryDomain.java, src/main/java/hudson/plugins/active_directory/ActiveDirectorySecurityRealm.java, src/main/java/hudson/plugins/active_directory/ActiveDirectoryUnixAuthenticationProvider.java that allows attackers to impersonate the Active Directory server Jenkins connects to for authentication if Jenkins is configured to use StartTLS.

References

github.com/advisories/GHSA-2h95-4xw9-m68j
github.com/jenkinsci/active-directory-plugin/commit/520faf5bb1078d75e5fed10b7bf5ac6241fe2fc4
jenkins.io/security/advisory/2019-01-28/
nvd.nist.gov/vuln/detail/CVE-2019-1003009

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