Bug 1066055 (CVE-2012-6638)

Summary:	CVE-2012-6638 Kernel: net: tcp: potential DoS via SYN+FIN messages
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, aquini, bhu, davej, dhoward, esammons, fhrbata, gansalmon, grocha, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, matt, mcressma, npajkovs, pholasek, plougher, pmatouse, rt-maint, rvrbovsk, shobbs, vkrizan, 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:	2014-04-24 19:43:53 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:	1066057, 1066058, 1097628
Bug Blocks:	879100, 1091509

Description Prasad Pandit 2014-02-17 15:13:23 UTC

Linux kernel built with the TCP/IP networking support(CONFIG_INET) is
vulnerable to a possible DoS attack. It could occur when accepting new TCP
connection requests with 'SYN+FIN' flags instead of only 'SYN' flag set.

A remote user/program could use this flaw to cause DoS by sending multiple
connection requests to a machine.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/fdf5af0daf8019cec2396cdef8fb042d80fe71fa

Comment 1 Prasad Pandit 2014-02-17 15:18:16 UTC

Statement:

This issue does not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2.

Comment 3 errata-xmlrpc 2014-04-24 17:40:33 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2014:0433 https://rhn.redhat.com/errata/RHSA-2014-0433.html

Comment 5 errata-xmlrpc 2014-06-19 18:03:11 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5.9 EUS - Server Only

Via RHSA-2014:0772 https://rhn.redhat.com/errata/RHSA-2014-0772.html