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Bug 478276 (CVE-2013-4163) - Kernel : net: panic while appending data to a corked IPv6 socket in ip6_append_data_mtu (CVE-2013-4163)
Summary: Kernel : net: panic while appending data to a corked IPv6 socket in ip6_appen...
Alias: CVE-2013-4163
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
Depends on:
Reported: 2013-07-26 19:33 UTC by Agostino Sarubbo
Modified: 2022-03-25 15:28 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2013-07-26 19:33:41 UTC
From ${URL} :

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:
Comment 1 GLSAMaker/CVETool Bot gentoo-dev 2013-08-30 01:13:16 UTC
CVE-2013-4163 (
  The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6
  implementation in the Linux kernel through 3.10.3 does not properly maintain
  information about whether the IPV6_MTU setsockopt option had been specified,
  which allows local users to cause a denial of service (BUG and system crash)
  via a crafted application that uses the UDP_CORK option in a setsockopt
  system call.
Comment 2 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-03-25 15:28:50 UTC
Fix in 3.10.4 onwards