Bug 1141742 (CVE-2012-6657)

Summary:	CVE-2012-6657 Kernel: net: guard tcp_set_keepalive against crash
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, bhu, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, 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:	It was found that the Linux kernel's networking implementation did not correctly handle the setting of the keepalive socket option on raw sockets. A local user able to create a raw socket could use this flaw to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-08-22 06:15:17 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:	1141744, 1141746
Bug Blocks:	1140494

Description Prasad Pandit 2014-09-15 11:28:36 UTC

Linux kernel built with the Networking support(CONFIG_NET) is vulnerable to a
crash, while resetting a socket timer. It could occur while doing a
setsockopt(SO_KEEPALIVE) call.

A privileged user/process able to create RAW socket could use this flaw to
crash the system kernel resulting in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/3e10986d1d698140747fcfc2761ec9cb64c1d582

Comment 1 Prasad Pandit 2014-09-15 11:31:15 UTC

Statement:

This issue does not affect the versions of Linux kernel as shipped with
Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2.

This issue affects the version of the kernel package as shipped with
Red Hat Enterprise Linux 5 and 6. Future kernel updates for Red Hat Enterprise
Linux 5 and 6 may address this issue.

Comment 3 Murray McAllister 2014-09-16 02:58:52 UTC

MITRE assigned CVE-2012-6657 to this issue:

http://www.openwall.com/lists/oss-security/2014/09/15/8

Comment 4 errata-xmlrpc 2014-12-16 19:14:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1997 https://rhn.redhat.com/errata/RHSA-2014-1997.html