Bug 857133 (CVE-2012-4423)

Summary:	CVE-2012-4423 libvirt: null function pointer invocation in virNetServerProgramDispatchCall()
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acathrow, berrange, bsarathy, clalancette, cwei, dyuan, eblake, itamar, jforbes, jyang, laine, libvirt-maint, mzhan, veillard, virt-maint
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:	2013-08-24 13:57:38 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:	842947, 857134, 857135
Bug Blocks:	857152, 861008

Description Petr Matousek 2012-09-13 16:14:43 UTC

It has been found that sending RPC message with an event as the RPC number, or RPC number that falls into gap in the RPC dispatch table, can lead to libvirtd accessing memory at page zero. A remote attacker could use this flaw to crash libvirtd (DoS).

Proposed upstream fix:
https://www.redhat.com/archives/libvir-list/2012-September/msg00843.html

Comment 1 Petr Matousek 2012-09-13 16:15:39 UTC

Statement:

The versions of libvirt as shipped with Red Hat Enterprise Linux 5 are not affected.

This issue did affect the versions of the libvirt package as shipped with Red Hat Enterprise Linux 6.

Comment 3 Petr Matousek 2012-09-13 16:17:55 UTC

Created libvirt tracking bugs for this issue

Affects: fedora-all [bug 857135]

Comment 4 Murray McAllister 2012-09-18 03:45:54 UTC

Acknowledgements:

This issue was discovered by Wenlong Huang of the Red Hat Virtualization QE Team.

Comment 5 errata-xmlrpc 2012-10-11 13:24:23 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:1359 https://rhn.redhat.com/errata/RHSA-2012-1359.html