CVE-2020-2301: Critical severity jenkins active directory vulnerability
Jenkins Active Directory Plugin 2.19 and earlier allows attackers to log in as any user with any password while a successful authentication of that user is still in the optional cache when using Windows/ADSI mode.
Other sources
Jenkins Active Directory Plugin implements two separate modes: Integration with ADSI on Windows, and an OS agnostic LDAP-based mode. Optionally, to reduce lookup time, a cache can be configured to remember user lookups and user authentications.
In Active Directory Plugin prior to 2.20 and 2.16.1, when run in Windows/ADSI mode, the provided password was not used when looking up an applicable cache entry. This allows attackers to log in as any user using any password while a successful authentication of that user is still in the cache.
As a workaround for this issue, the cache can be disabled.
Active Directory Plugin 2.20 and 2.16.1 includes the provided password in cache entry lookup.
Additionally, the Java system property hudson.plugins.activedirectory.CacheUtil.noCacheAuth can be set to true to no longer cache user authentications.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2020-2301?
CVE-2020-2301 is a vulnerability in the Active Directory Plugin for Jenkins that allows attackers to log in as any user.
What is the severity of CVE-2020-2301?
The severity of CVE-2020-2301 is critical with a CVSS score of 9.8.
How does CVE-2020-2301 affect Jenkins Active Directory Plugin?
CVE-2020-2301 affects Jenkins Active Directory Plugin versions 2.19 and earlier.
How can an attacker exploit CVE-2020-2301?
An attacker can exploit CVE-2020-2301 by logging in as any user with any password.
Is there a fix for CVE-2020-2301?
Yes, the fix for CVE-2020-2301 is available in versions 2.20 and above of the Active Directory Plugin.