Bug 1027752 - (CVE-2013-4270) CVE-2013-4270 kernel: net: permissions flaw in /proc/sys/net
CVE-2013-4270 kernel: net: permissions flaw in /proc/sys/net
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=20131006,repor...
: Security
Depends On: 987055 1027755 1027757
Blocks: 1027758
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Reported: 2013-11-07 06:28 EST by Petr Matousek
Modified: 2016-04-26 11:39 EDT (History)
30 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-01-28 13:33:07 EST
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Description Petr Matousek 2013-11-07 06:28:48 EST
A flaw was found in the way net_ctl_permissions() function in the Linux kernel checked permissions.

As a result, an unprivileged local user could potentially use this flaw to access files in /proc/sys/net in a way that he would otherwise be unable to.

Introduced by:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cff109768b2d9c03095848f4cd4b0754117262aa

Fixed by:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2433c8f094a008895e66f25bd1773cdb01c91d01

Acknowledgements:

This issue was discovered by Miroslav Vadkerti of Red Hat.
Comment 2 Petr Matousek 2013-11-07 06:34:48 EST
Statement:

This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5 and 6.
Comment 3 errata-xmlrpc 2014-01-28 12:40:29 EST
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0100 https://rhn.redhat.com/errata/RHSA-2014-0100.html

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