Bug 821676 - (CVE-2012-2625) CVE-2012-2625 xen: pv bootloader doesn't check the size of the bzip2 or lzma compressed kernel
CVE-2012-2625 xen: pv bootloader doesn't check the size of the bzip2 or lzma ...
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=20120504,repor...
: Security
Depends On: 818412 821704 821705
Blocks: 821701
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Reported: 2012-05-15 06:36 EDT by Petr Matousek
Modified: 2016-11-08 11:13 EST (History)
8 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-08-24 09:45:45 EDT
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Description Petr Matousek 2012-05-15 06:36:33 EDT
The pv bootloader doesn't check the size of a bzip2 or lzma compressed kernel image.  Denial of service can be caused by padding a large file at the end of the kernel image, which can be used by a malicious domU root to cause OOM conditions on the host.

Acknowledgements:

Red Hat would like to thank Xinli Niu for reporting this issue.
Comment 3 Eugene Teo (Security Response) 2012-05-15 21:43:16 EDT
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1817#c4
This has been assigned CVE-2012-2625 by MITRE.
Comment 4 Eugene Teo (Security Response) 2012-05-15 21:44:32 EDT
This is public, http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1817.
Comment 5 Petr Matousek 2012-07-10 09:49:21 EDT
Upstream fix:

http://xenbits.xensource.com/hg/xen-unstable.hg/rev/60f09d1ab1fe
Comment 6 errata-xmlrpc 2012-07-31 14:45:50 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:1130 https://rhn.redhat.com/errata/RHSA-2012-1130.html

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