Bug 1919906 (CVE-2020-0432)

Summary:	CVE-2020-0432 kernel: possible out of bounds write in skb_to_mamac of networking.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, bhu, blc, bmasney, brdeoliv, bskeggs, chwhite, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mlangsdo, nmurray, ptalbert, qzhao, rt-maint, 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 was found in the Linux kernel in the skb_to_mamac function of networking.c where there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-01-28 14:41:42 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:	1919909
Bug Blocks:	1919908

Description Dhananjay Arunesh 2021-01-25 11:44:12 UTC

In skb_to_mamac of networking.c, there is a possible out of bounds write due to
an integer overflow. This could lead to local escalation of privilege with no
additional execution privileges needed. User interaction is not needed for
exploitation.Product.

References:
https://android.googlesource.com/kernel/common/+/d66184791ec81952256d1486e29378b0178bee23
https://source.android.com/security/bulletin/pixel/2020-09-01

Comment 1 Dhananjay Arunesh 2021-01-25 11:46:10 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1919909]

Comment 2 Justin M. Forbes 2021-01-25 17:32:54 UTC

This does not impact Fedora as we do not enable staging drivers.

Comment 3 Product Security DevOps Team 2021-01-28 14:41:42 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-2020-0432