Bug 1433955 (CVE-2017-6967)

Summary:	CVE-2017-6967 xrdp: Incorrect placement of auth_start_session()
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bojan, itamar
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:	2019-06-08 03:09:13 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:	1433958, 1433959
Bug Blocks:

Description Andrej Nemec 2017-03-20 13:07:03 UTC

xrdp calls the PAM function auth_start_session() in an incorrect location, leading to PAM session modules not being properly initialized, with a potential consequence of incorrect configurations or elevation of privileges, aka a pam_limits.so bypass.

Upstream bug:

https://github.com/neutrinolabs/xrdp/issues/350

Upstream patch:

https://github.com/neutrinolabs/xrdp/pull/696/commits/44129acd210c803fc8bbcfaf1b0db05e5bb4034f

Comment 1 Andrej Nemec 2017-03-20 13:11:34 UTC

Created xrdp tracking bugs for this issue:

Affects: epel-all [bug 1433958]
Affects: fedora-all [bug 1433959]

Comment 2 Product Security DevOps Team 2019-06-08 03:09:13 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.