Bug 447759 – CVE-2008-1952 qemu/xen/kvm: ioemu: Fix PVFB backend to limit frame buffer size

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Bug 447759 - (CVE-2008-1952) CVE-2008-1952 qemu/xen/kvm: ioemu: Fix PVFB backend to limit frame buffer size

Summary:	CVE-2008-1952 qemu/xen/kvm: ioemu: Fix PVFB backend to limit frame buffer size

Status:	CLOSED CURRENTRELEASE

Aliases:	CVE-2008-1952

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	high Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=important,source=redhat,report...
Keywords:	Security

Depends On:	447760 447761
Blocks:
	Show dependency tree / graph

Reported:	2008-05-21 12:55 EDT by Jan Lieskovsky
Modified:	2009-09-11 05:01 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2009-09-11 05:01:20 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2008:0892	normal	SHIPPED_LIVE	Important: xen security and bug fix update	2008-10-01 11:27:13 EDT

Groups: None (edit)

Description Jan Lieskovsky 2008-05-21 12:55:10 EDT

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 13:59:32 EDT

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

Comment 3 Chris Lalancette 2009-09-11 05:01:20 EDT

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

Chris Lalancette

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