Bug 1890199 (CVE-2020-27187)

Summary:	CVE-2020-27187 kpmcore: kpmcore_externalcommand helper can be exploited in local privilege escalation
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	mattia.verga
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kpmcore 4.2.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-10-21 20:21:15 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:	1890200, 1890207
Bug Blocks:

Description Michael Kaplan 2020-10-21 16:42:33 UTC

kpmcore_externalcommand helper contains a logic flaw in which the service invoking dbus
is not properly checked. An attacker on your local machine can replace /etc/fstab,
execute mount and other partitioning related commands while KDE Partition Manager is running.
mount command can then be used to gain full root privileges.

Comment 1 Michael Kaplan 2020-10-21 16:56:12 UTC

Created kpmcore tracking bugs for this issue:

Affects: epel-8 [bug 1890207]

Comment 2 Product Security DevOps Team 2020-10-21 20:21:15 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.

Comment 3 msiddiqu 2020-11-23 09:24:27 UTC

References: 
 
https://kde.org/info/security/advisory-20201017-1.txt