Bug 1759059 (CVE-2019-15927)

Summary:	CVE-2019-15927 kernel: out-of-bounds in function build_audio_procunit in sound/usb/mixer.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, rkeshri, rt-maint, rvrbovsk, steved, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds flaw was found in the ALSA usb-audio subsystem in the Linux kernel. An array boundary check was needed to restrict the array size; failing this can cause an out-of-bound access problem. Data confidentiality and integrity, as well as system availability, are all threats with this vulnerability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-27 10:49:40 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:	1759060, 1809512, 1809513, 1809514, 1809515, 1809516
Bug Blocks:	1759061

Description Dhananjay Arunesh 2019-10-07 10:20:12 UTC

A vulnerability was found in build_audio_procunit in sound/usb/mixer.c in ALSA usb-audio subsystem for a local user,  while accessing an array (desc->baSourceID) a boundary check was needed to restrict the array size, failing this can cause an out-of-bound access problem.


Reference:
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f4351a199cc120ff9d59e06d02e8657d08e6cc46

Comment 1 Dhananjay Arunesh 2019-10-07 10:20:50 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1759060]

Comment 2 Justin M. Forbes 2019-10-07 14:23:41 UTC

This was fixed for Fedora in the 4.20.2 stable kernel updates.

Comment 4 Rohit Keshri 2020-03-03 09:38:36 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.