Bug 870412 - (CVE-2012-4544) CVE-2012-4544 xen: Xen domain builder Out-of-memory due to malicious kernel/ramdisk
CVE-2012-4544 xen: Xen domain builder Out-of-memory due to malicious kernel/r...
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=20121026,repor...
: Security
Depends On: 870413 870414 876997
Blocks: 870415 903143
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Reported: 2012-10-26 08:25 EDT by Petr Matousek
Modified: 2015-07-31 06:33 EDT (History)
14 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-08-24 09:56:45 EDT
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Description Petr Matousek 2012-10-26 08:25:42 EDT
The Xen PV domain builder contained no validation of the size of the supplied kernel or ramdisk either before or after decompression. This could cause the toolstack to consume all available RAM in the domain running the domain builder.

A malicious guest administrator who can supply a kernel or ramdisk can exhaust memory in domain 0 leading to a denial of service attack.

HVM guests are not affected by this vulnerability.

Reference:
http://lists.xen.org/archives/html/xen-devel/2012-10/msg02015.html
http://www.openwall.com/lists/oss-security/2012/10/26/3

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 2 Petr Matousek 2012-10-26 08:28:55 EDT
Created xen tracking bugs for this issue

Affects: fedora-all [bug 870414]
Comment 6 errata-xmlrpc 2013-02-07 13:54:25 EST
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:0241 https://rhn.redhat.com/errata/RHSA-2013-0241.html

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