Bug 1674453 (CVE-2019-7639)

Summary:	CVE-2019-7639 gsi-openssh: enabling PermitPAMUserChange allows to login with the correct username and wrong password
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	mattias.ellert
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:47:37 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:	1673802, 1674455
Bug Blocks:

Description msiddiqu 2019-02-11 11:49:30 UTC

An issue was discovered in gsi-openssh-server 7.9p1 on Fedora 29. If PermitPAMUserChange is set to yes in the /etc/gsissh/sshd_config file, logins succeed with a valid username and an incorrect password, even though a failure entry is recorded in the /var/log/messages file.

Comment 1 msiddiqu 2019-02-11 11:51:29 UTC

Reference: 

https://bugzilla.redhat.com/show_bug.cgi?id=1673802

Comment 2 msiddiqu 2019-02-11 11:52:07 UTC

Created gsi-openssh tracking bugs for this issue:

Affects: epel-all [bug 1674455]

Comment 3 Product Security DevOps Team 2019-06-10 10:47:37 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.