Bug 987633 (CVE-2013-4163)

Summary:	CVE-2013-4163 Kernel: net: panic while appending data to a corked IPv6 socket in ip6_append_data_mtu
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, anton, bhu, davej, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mcressma, plougher, rt-maint, rvrbovsk, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-10 05:26:12 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	987636, 987638, 987639, 994346
Bug Blocks:	984924

Description Prasad Pandit 2013-07-23 19:32:27 UTC

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


Acknowledgements:

Red Hat would like to thank Hannes Frederic Sowa for reporting this issue.

Comment 2 Prasad Pandit 2013-07-23 19:41:32 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 987639]

Comment 3 Prasad Pandit 2013-07-23 19:46:17 UTC

Statement:

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 17:14:11 UTC

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