Bug 1395187 (CVE-2016-8650)

Summary:	CVE-2016-8650 kernel: Null pointer dereference via keyctl
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, arm-mgr, bhu, dhoward, dominik.mierzejewski, fhrbata, gansalmon, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, slawomir, williams, wmealing, yozone
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 flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:02:03 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:	1398455, 1398456, 1398457, 1398458, 1398459, 1398460, 1398461, 1398462, 1398463
Bug Blocks:	1395193

Description Andrej Nemec 2016-11-15 11:35:29 UTC

A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key.  This flaw panics the machine during the verification of the RSA key and is key-payload independant.

This vulnerably can be triggered by any unprivileged user with a local shell account.

References:

http://seclists.org/fulldisclosure/2016/Nov/76

Product bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1343162

Comment 1 Wade Mealing 2016-11-24 07:13:14 UTC

Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7, MRG-2 and realtime kernels.

This issue does not affect kernels that ship with Red Hat Enterprise Linux 5.

Comment 4 Andrej Nemec 2016-11-24 08:54:24 UTC

Proposed patch:

https://lkml.org/lkml/2016/11/23/477

Comment 9 Wade Mealing 2016-11-24 23:37:57 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1398463]

Comment 10 errata-xmlrpc 2017-04-12 10:51:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:0932 https://access.redhat.com/errata/RHSA-2017:0932

Comment 11 errata-xmlrpc 2017-04-12 10:55:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0931 https://access.redhat.com/errata/RHSA-2017:0931

Comment 12 errata-xmlrpc 2017-04-12 13:29:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0933 https://access.redhat.com/errata/RHSA-2017:0933

Comment 14 errata-xmlrpc 2018-06-19 04:46:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854