Bug 1797080 (CVE-2020-2099)

Summary:	CVE-2020-2099 jenkins: Inbound TCP Agent Protocol/3 authentication bypass
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abenaiss, adam.kaplan, aos-bugs, bmontgom, eparis, extras-orphan, java-sig-commits, jburrell, jokerman, mizdebsk, msrb, nstielau, pbhattac, sfowler, sponnaga, wzheng
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	jenkins 2.219, jenkins LTS 2.204.2	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Jenkins. Encryption key parameters are improperly reused in the Inbound TCP Agent Protocol/3 allowing unauthorized attackers with knowledge of agent names to obtain the connection secrets for those agents. The highest threat from this vulnerability is to data confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 01:16:18 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:	1797081, 1797143, 1797144, 1797146, 1813070, 1873172
Bug Blocks:	1797089

Description Pedro Sampaio 2020-01-31 20:59:32 UTC

Jenkins 2.213 and earlier, LTS 2.204.1 and earlier improperly reuses encryption key parameters in the Inbound TCP Agent Protocol/3, allowing unauthorized attackers with knowledge of agent names to obtain the connection secrets for those agents, which can be used to connect to Jenkins, impersonating those agents.

References:

https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1682
http://www.openwall.com/lists/oss-security/2020/01/29/1

Comment 1 Pedro Sampaio 2020-01-31 20:59:55 UTC

Created jenkins tracking bugs for this issue:

Affects: fedora-all [bug 1797081]

Comment 5 Sam Fowler 2020-02-01 02:01:17 UTC

"Any security advisory related updates to Jenkins core or the plugins we include in the OpenShift Jenkins master image will only occur in the v3.11 and v4.x branches of this repository."

https://github.com/openshift/jenkins/blob/master/README.md#jenkins-security-advisories-the-master-image-from-this-repository-and-the-oc-binary

Comment 6 Akram Ben Aissi 2020-03-03 09:07:20 UTC

This bug has been fixed by https://errata.devel.redhat.com/advisory/50532 that brought Jenkins 2.204.2