Bug 1388821 (CVE-2016-8646)

Summary:	CVE-2016-8646 kernel: Oops in shash_async_export()
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, bhu, dhoward, fhrbata, iboverma, jkacur, joelsmith, jross, kernel-mgr, lgoncalv, matt, mcressma, nmurray, pholasek, plougher, rvrbovsk, security-response-team, slawomir, vdronov, vvs, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel. An unprivileged local user could trigger oops in shash_async_export() by attempting to force the in-kernel hashing algorithms into decrypting an empty data set.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:01:13 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:	1387632, 1394099, 1394100, 1394101, 1394102, 1395044, 1459304
Bug Blocks:	1388822

Description Andrej Nemec 2016-10-26 09:02:11 UTC

A vulnerability was found in the Linux kernel. An unprivileged local user could triger oops in shash_async_export() by attempting to force the in-kernel hashing algorithms into decrypting an empty data set.


Upstream discussion:

https://lkml.org/lkml/2016/10/12/198

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4afa5f9617927453ac04b24b584f6c718dfb4f45

Oss-sec post: 
http://www.openwall.com/lists/oss-security/2016/11/15/2

Comment 1 Andrej Nemec 2016-10-26 09:02:25 UTC

Acknowledgments:

Name: Igor Redko (Virtuozzo kernel team)

Comment 2 Wade Mealing 2016-11-07 02:56:21 UTC

*** Bug 1390878 has been marked as a duplicate of this bug. ***

Comment 3 Wade Mealing 2016-11-07 05:30:53 UTC

Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 as the code creating this issue is not present in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG-2. Future Linux kernel updates for the respective releases might address this issue.

Comment 10 Wade Mealing 2016-11-15 02:19:30 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1395044]

Comment 11 errata-xmlrpc 2017-05-25 13:30:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:1297 https://access.redhat.com/errata/RHSA-2017:1297

Comment 12 errata-xmlrpc 2017-05-25 13:40:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1298 https://access.redhat.com/errata/RHSA-2017:1298

Comment 13 errata-xmlrpc 2017-05-25 15:37:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1308 https://access.redhat.com/errata/RHSA-2017:1308