Bug 703026 - (CVE-2011-1776) CVE-2011-1776 kernel: validate size of EFI GUID partition entries
CVE-2011-1776 kernel: validate size of EFI GUID partition entries
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
public=20110506,reported=20110509,sou...
: Security
Depends On: 703027 703028 703029 703030 703031
Blocks:
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Reported: 2011-05-08 23:09 EDT by Eugene Teo (Security Response)
Modified: 2015-07-29 13:47 EDT (History)
17 users (show)

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Doc Type: Bug Fix
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Last Closed: 2015-07-29 08:44:59 EDT
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Description Eugene Teo (Security Response) 2011-05-08 23:09:02 EDT
The kernel automatically evaluates partition tables of storage devices. The code for evaluating GUID partitions (in fs/partitions/efi.c) contains a bug that can cause a kernel heap overflow on certain corrupted GUID partition tables.

Upstream commit:
http://git.kernel.org/linus/fa039d5f6b126fbd65eefa05db2f67e44df8f121

Acknowledgements:

Red Hat would like to thank Timo Warns for reporting this issue.
Comment 3 Petr Matousek 2011-05-09 16:45:25 EDT
Statement:

This issue affects the versions of Linux kernel as shipped with Red Hat
Enterprise 4, 5, 6, and Red Hat Enterprise MRG. This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0927.html and https://rhn.redhat.com/errata/RHSA-2011-1189.html, and https://rhn.redhat.com/errata/RHSA-2011-1253.html. Red Hat Enterprise Linux 4 is now in Production 3 of the maintenance life-cycle, https://access.redhat.com/support/policy/updates/errata/, therefore the fix for this issue is not currently planned to be included in the future updates.
Comment 4 Eugene Teo (Security Response) 2011-05-10 21:43:48 EDT
CVE-2011-1776 addresses the size of partition entries used for allocating a data structure.
Comment 10 errata-xmlrpc 2011-07-15 02:09:13 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0927 https://rhn.redhat.com/errata/RHSA-2011-0927.html
Comment 11 errata-xmlrpc 2011-08-23 10:42:38 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:1189 https://rhn.redhat.com/errata/RHSA-2011-1189.html
Comment 12 errata-xmlrpc 2011-09-12 15:46:07 EDT
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2011:1253 https://rhn.redhat.com/errata/RHSA-2011-1253.html

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