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Bug 490698 (CVE-2013-4270) - Kernel: net: permissions flaw in /proc/sys/net (CVE-2013-4270)
Summary: Kernel: net: permissions flaw in /proc/sys/net (CVE-2013-4270)
Status: RESOLVED FIXED
Alias: CVE-2013-4270
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
URL: https://bugzilla.redhat.com/show_bug....
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-11-07 16:45 UTC by Agostino Sarubbo
Modified: 2022-03-25 15:43 UTC (History)
1 user (show)

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Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2013-11-07 16:45:05 UTC
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.

Acknowledgements:

This issue was discovered by Miroslav Vadkerti of Red Hat.

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
Comment 1 John Helmert III gentoo-dev Security 2022-03-25 15:43:25 UTC
Fix in 3.11.5 onwards