Bug 1919791 (CVE-2020-0404)

Summary:	CVE-2020-0404 kernel: avoid cyclic entity chains due to malformed USB descriptors
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, adscvr, airlied, alciregi, allarkin, bhu, blc, bmasney, brdeoliv, bskeggs, chwhite, dhoward, dramseur, dvlasenk, fhrbata, hdegoede, hkrzesin, itamar, jarod, jarodwilson, jeremy, jforbes, jhunter, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, kmitts, lgoncalv, linville, masami256, mchehab, mgala, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, steved, walters, 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:	A flaw linked list corruption in the Linux kernel for USB Video Class driver functionality was found in the way user connects web camera to the USB port. A local user could use this flaw to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-11 06:45:42 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:	1919792, 1921871, 1921872
Bug Blocks:	1919788

Description Dhananjay Arunesh 2021-01-25 07:48:01 UTC

A vulnerability was found in Kernel, where an avoid cyclic entity chains due to malformed USB descriptors Way back in 2017, fuzzing the 4.14-rc2 USB stack with syzkaller kicked up the UVC chain scanning code.

References:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68035c80e129c4cfec659aac4180354530b26527

Comment 1 Dhananjay Arunesh 2021-01-25 07:48:48 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1919792]

Comment 2 Justin M. Forbes 2021-01-25 17:24:08 UTC

This was fixed for Fedora with the 5.4.19 stable kernel updates.

Comment 4 Alex 2021-01-28 19:01:20 UTC

Mitigation:

To mitigate this issue, prevent the module uvcvideo from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.

Comment 6 Alex 2021-01-31 12:09:45 UTC

External References:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=68035c80e129c4cfec659aac4180354530b26527

Comment 18 errata-xmlrpc 2022-05-10 14:38:43 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975

Comment 19 errata-xmlrpc 2022-05-10 14:44:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988

Comment 20 Product Security DevOps Team 2022-05-11 06:45:38 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-0404