CVE-2019-1003009 Jenkins Active Directory Plugin Improper certificate validation with StartTLS

What is CVE-2019-1003009?

CVE-2019-1003009 is a high-severity vulnerability in Jenkins Active Directory Plugin, published on 6 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-295

Which versions are affected by CVE-2019-1003009?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:active-directory. It affects 1 product.

Products include Jenkins Active Directory.

How do I fix CVE-2019-1003009?

Upgrade org.jenkins-ci.plugins:active-directory to 2.11 or later.

Is CVE-2019-1003009 being exploited?

There is no known exploitation of CVE-2019-1003009 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Active Directory Plugin

• CVE-2020-2299 Improper Authentication in Jenkins Active Directory Plugin Critical 9.8
• CVE-2020-2300 Improper Authentication (empty password) in Jenkins Active Directory Plugin Critical 9.8
• CVE-2020-2301 Authentication cache in Active Directory Jenkins Plugin allows logging in with any password Critical 9.8
• CVE-2017-2649 Jenkins Active Directory Plugin did not verify certificate of AD server High 8.1
• CVE-2026-48918 Jenkins Active Directory Plugin follows LDAP referrals by default Medium 6.6

Sources

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

Also known as GHSA-2h95-4xw9-m68j.