Bug 987633 - (CVE-2013-4163) CVE-2013-4163 Kernel: net: panic while appending data to a corked IPv6 socket in ip6_append_data_mtu
CVE-2013-4163 Kernel: net: panic while appending data to a corked IPv6 socket...
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 987636 987638 987639 994346
Blocks: 984924
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Reported: 2013-07-23 15:32 EDT by Prasad J Pandit
Modified: 2015-10-15 13:55 EDT (History)
27 users (show)

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Doc Type: Bug Fix
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Last Closed: 2014-06-10 01:26:12 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Prasad J Pandit 2013-07-23 15:32:27 EDT
Linux kernel built with the IPv6 networking support is vulnerable to a crash
while appending data to an IPv6 socket with UDP_CORKED option set. UDP_CORK
enables accumulating data and sending it as single datagram.

An unprivileged user/program could use this flaw to crash the kernel, resulting in local DoS.

Upstream fix:
 -> https://git.kernel.org/linus/75a493e60ac4bbe2e977e7129d6d8cbb0dd236be


Red Hat would like to thank Hannes Frederic Sowa for reporting this issue.
Comment 2 Prasad J Pandit 2013-07-23 15:41:32 EDT
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 987639]
Comment 3 Prasad J Pandit 2013-07-23 15:46:17 EDT

This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.

This issue affects the version of the kernel package as shipped with Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise MRG 2 may address this issue.
Comment 7 errata-xmlrpc 2013-09-16 13:14:11 EDT
This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2013:1264 https://rhn.redhat.com/errata/RHSA-2013-1264.html

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