Bug 857133 - (CVE-2012-4423) CVE-2012-4423 libvirt: null function pointer invocation in virNetServerProgramDispatchCall()
CVE-2012-4423 libvirt: null function pointer invocation in virNetServerProgra...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20120724,repor...
: Security
Depends On: 842947 857134 857135
Blocks: 857152 861008
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Reported: 2012-09-13 12:14 EDT by Petr Matousek
Modified: 2013-08-24 09:57 EDT (History)
15 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-08-24 09:57:38 EDT
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Description Petr Matousek 2012-09-13 12:14:43 EDT
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 12:15:39 EDT
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 12:17:55 EDT
Created libvirt tracking bugs for this issue

Affects: fedora-all [bug 857135]
Comment 4 Murray McAllister 2012-09-17 23:45:54 EDT
Acknowledgements:

This issue was discovered by Wenlong Huang of the Red Hat Virtualization QE Team.
Comment 5 errata-xmlrpc 2012-10-11 09:24:23 EDT
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

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