Bug 1213951 (CVE-2015-3332)

Summary:	CVE-2015-3332 kernel: TCP Fast Open local DoS
Product:	[Other] Security Response	Reporter:	Vasyl Kaigorodov <vkaigoro>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, aquini, arm-mgr, bhu, blc, carnil, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, kstutsma, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, mlangsdo, nmurray, pholasek, plougher, pmatouse, ppandit, 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:	2015-05-05 09:49:00 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:	1213955
Bug Blocks:	1211864, 1213954

Description Vasyl Kaigorodov 2015-04-21 15:31:57 UTC

Linux kernel built with the IPv4 networking support(CONFIG_NET) is vulnerable to a DoS flaw. It could occur while using TCP Fast open option when initiating a network connection. This issue is a regression caused by upstream commit '355a901e6cf1', when it was back-ported to older 3.10.y - 3.16.y branches.

An unprivileged local user could use this flaw to crash the system resulting in DoS.

Upstream fix:
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  -> http://www.spinics.net/lists/netdev/msg325602.html

References:
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  -> http://www.openwall.com/lists/oss-security/2015/04/18/2
  -> https://bugs.debian.org/782515

Comment 1 Vasyl Kaigorodov 2015-04-21 15:36:07 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1213955]

Comment 2 Prasad Pandit 2015-04-21 19:48:18 UTC

Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.