Bug 1563994 (CVE-2017-0861)

Summary:	CVE-2017-0861 kernel: Use-after-free in snd_pcm_info function in ALSA subsystem potentially leads to privilege escalation
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	airlied, ajax, aquini, bhu, blc, bskeggs, dhoward, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, steved, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.15	Doc Type:	If docs needed, set a value
Doc Text:	Use-after-free vulnerability in the snd_pcm_info() function in the ALSA subsystem in the Linux kernel allows attackers to induce a kernel memory corruption and possibly crash or lock up a system. Due to the nature of the flaw, a privilege escalation cannot be fully ruled out, although we believe it is unlikely.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:19:40 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:	1563995, 1563996, 1565188, 1565189, 1565190, 1565191, 1565192, 1740211, 1740213, 1740214, 1740215
Bug Blocks:	1563998

Description Adam Mariš 2018-04-05 06:51:32 UTC

Use-after-free vulnerability in the snd_pcm_info() function in the ALSA subsystem in the Linux kernel allows attackers to induce a kernel memory corruption and possibly crash or lock up a system. Due to the nature of the flaw, a privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

http://lists.alioth.debian.org/pipermail/secure-testing-commits/2017-December/059967.html

https://source.android.com/security/bulletin/pixel/2017-11-01#kernel-components

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=362bca57f5d78220f8b5907b875961af9436e229

Comment 1 Adam Mariš 2018-04-05 06:52:21 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1563995]

Comment 3 Justin M. Forbes 2018-04-05 14:29:14 UTC

This was fixed for Fedora with the 4.14.6 stable updates.

Comment 7 errata-xmlrpc 2018-08-14 18:25:55 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:2390 https://access.redhat.com/errata/RHSA-2018:2390

Comment 8 errata-xmlrpc 2018-10-30 07:32:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083

Comment 9 errata-xmlrpc 2018-10-30 07:38:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096

Comment 12 errata-xmlrpc 2020-01-07 12:26:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.5 Extended Update Support

Via RHSA-2020:0036 https://access.redhat.com/errata/RHSA-2020:0036