Bug 447759 (CVE-2008-1952)

Summary:	CVE-2008-1952 qemu/xen/kvm: ioemu: Fix PVFB backend to limit frame buffer size
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED CURRENTRELEASE	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	armbru, bburns, berrange, chrisw, clalance
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:	2009-09-11 09:01:20 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:	447760, 447761
Bug Blocks:

Description Jan Lieskovsky 2008-05-21 16:55:10 UTC

Description of problem:

The recent fix to validate the frontend's frame buffer description
neglected to limit the frame buffer size correctly. This lets a
malicious frontend make the backend attempt to map an arbitrary amount
of guest memory, which could be useful for a denial of service attack
against dom0.

Proposed upstream patch:

http://xenbits.xensource.com/xen-unstable.hg?rev/9044705960cb30cec385bdca7305bcf7db096721

Comment 2 Jan Lieskovsky 2008-05-21 17:59:32 UTC

This fix is a sophisticated solution (another catch) for CVE-2008-1943.

Comment 3 Chris Lalancette 2009-09-11 09:01:20 UTC

This is fixed in all the relevant streams, so closing this tracker as CURRENTRELEASE.

Chris Lalancette