Bug 1302673

Summary:	CVE-2016-2070 kernel: potential division by zero in TCP code [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Vladis Dronov <vdronov>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	22	CC:	gansalmon, itamar, jforbes, jonathan, jwboyer, kernel-maint, madhu.chinakonda, mchehab
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Release Note
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-02-09 15:08:09 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:
Bug Blocks:	1302219

Description Vladis Dronov 2016-01-28 11:22:52 UTC

This is an automatically created tracking bug!  It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.

For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.

For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs

When submitting as an update, use the fedpkg template provided in the next
comment(s).  This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.

Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.

NOTE: this issue affects multiple supported versions of Fedora. While only
one tracking bug has been filed, please correct all affected versions at
the same time.  If you need to fix the versions independent of each other,
you may clone this bug as appropriate.

Reproducers, if any, will remain confidential and never be made public, unless done so by the security team.

[bug automatically created by: add-tracking-bugs]

Comment 1 Vladis Dronov 2016-01-28 11:23:00 UTC

Use the following template to for the 'fedpkg update' request to submit an
update for this issue as it contains the top-level parent bug(s) as well as
this tracking bug.  This will ensure that all associated bugs get updated
when new packages are pushed to stable.

=====

# bugfix, security, enhancement, newpackage (required)
type=security

# testing, stable
request=testing

# Bug numbers: 1234,9876
bugs=1302219,1302673

# Description of your update
notes=Security fix for CVE-2016-2070

# Enable request automation based on the stable/unstable karma thresholds
autokarma=True
stable_karma=3
unstable_karma=-3

# Automatically close bugs when this marked as stable
close_bugs=True

# Suggest that users restart after update
suggest_reboot=False

======

Additionally, you may opt to use the bodhi update submission link(s) instead:

https://bodhi.fedoraproject.org/updates/new?type_=security&bugs=1302219,1302673

Comment 2 Vladis Dronov 2016-01-28 11:25:12 UTC

commit 3759824d introduced the flaw in v4.3-rc1.
an upstream fix is in since v4.4:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390

Comment 3 Josh Boyer 2016-01-28 13:25:10 UTC

(In reply to Vladis Dronov from comment #2)
> commit 3759824d introduced the flaw in v4.3-rc1.
> an upstream fix is in since v4.4:
> 
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
> ?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390

That is queued for the 4.3.5 stable release, which is scheduled to come out tomorrow.  We likely are not going to be doing a build for F22 or F23 before then so we will pick it up with 4.3.5.

Rawhide already has the fix.

Comment 4 Josh Boyer 2016-02-09 15:08:09 UTC

4.3.5 went stable yesterday.  This is fixed.