Bug 1642883

Summary: jenkins: Ephemeral user record was created on some invalid authentication attempts
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED DUPLICATE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ahardin, aos-bugs, bleanhar, bparees, ccoleman, dedgar, eparis, java-sig-commits, jgoulding, jokerman, mchappel, mizdebsk, msrb, sfowler
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: jenkins 2.146, jenkins 2.138.2 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-01-14 02:12:19 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1642894    
Bug Blocks: 1642893    

Description Andrej Nemec 2018-10-25 09:19:30 UTC 
When attempting to authenticate using API token, an ephemeral user record was created to validate the token in case an external security realm was used, and the user record in Jenkins not previously saved, as (legacy) API tokens could exist without a persisted user record.

This behavior could be abused to create a large number of ephemeral user records in memory.

This is the same vulnerability as SECURITY-672. The fix for SECURITY-672 was previously incorrectly applied and therefore not effective. This has been fixed.


External References:

https://jenkins.io/security/advisory/2018-10-10/#SECURITY-1162
Comment 1 Andrej Nemec 2018-10-25 09:40:01 UTC 
Created jenkins tracking bugs for this issue:

Affects: fedora-all [bug 1642894]
Comment 2 Sam Fowler 2019-01-14 02:12:19 UTC 

*** This bug has been marked as a duplicate of bug 1620342 ***