Bug 1271992 (CVE-2015-0856)

Summary:	CVE-2015-0856 sddm: Access to the KDE crash handler
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jgrulich, kevin, ltinkl, mbriza, me, pierluigi.fiorini, rdieter
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-12 13:37:53 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:	1271993
Bug Blocks:

Description Adam Mariš 2015-10-15 08:54:31 UTC

A vulnerability in sddm was found allowing shell access to the sddm user in case of a crash. Some themes may use KDE components which will automatically load KDE's crash handler. If the greeter were to then somehow crash, that would leave a crash handler allowing other actions, albeit as the locked down SDDM user. Only SDDM users using the breeze theme from plasma-workspace are affected.

Upstream patch:

https://github.com/sddm/sddm/commit/4cfed6b0a625593fb43876f04badc4dd99799d86

Comment 1 Adam Mariš 2015-10-15 08:54:58 UTC

Created sddm tracking bugs for this issue:

Affects: fedora-all [bug 1271993]

Comment 2 Fedora Update System 2015-10-31 16:09:35 UTC

sddm-0.12.0-5.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2015-11-13 01:53:40 UTC

sddm-0.12.0-5.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.