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
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: CVE-2008-1952
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 447760 447761
Blocks:
TreeView+ depends on / blocked
 
Reported: 2008-05-21 16:55 UTC by Jan Lieskovsky
Modified: 2019-09-29 12:24 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2009-09-11 09:01:20 UTC


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2008:0892 0 normal SHIPPED_LIVE Important: xen security and bug fix update 2008-10-01 15:27:13 UTC

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


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