Bug 1824059 (CVE-2019-20636)

Summary:	CVE-2019-20636 kernel: out-of-bounds write via crafted keycode table
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
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, allarkin, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mkim, mlangsdo, mmilgram, mthacker, nhorman, nmurray, pmatouse, qzhao, rcarrier, rt-maint, rvrbovsk, security-response-team, sgrubb, steved, therman, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.4.12	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds write flaw was found in the Linux kernel. A crafted keycode table could be used by drivers/input/input.c to perform the out-of-bounds write. A local user with root access can insert garbage to this keycode table that can lead to out-of-bounds memory access. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-07-07 19:28:10 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:	1828222, 1828223, 1828224, 1828225, 1828226, 1888661, 1894486, 1894487, 1894489, 1894490
Bug Blocks:	1824060

Description Marian Rehak 2020-04-15 08:10:27 UTC

In the Linux kernel before 5.4.12, drivers/input/input.c has out-of-bounds writes via a crafted keycode table, as demonstrated by input_set_keycode, aka CID-cb222aed03d7.

Upstream commit:

https://github.com/torvalds/linux/commit/cb222aed03d798fc074be55e59d9a112338ee784

Comment 11 Alex 2020-04-27 10:29:19 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.

Comment 13 Alex 2020-04-27 11:01:54 UTC

Statement:

This issue was rated as having Moderate impact because of the need of physical access or administrator privileges to trigger it.

Comment 22 errata-xmlrpc 2020-07-07 13:18:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:2854 https://access.redhat.com/errata/RHSA-2020:2854

Comment 23 Product Security DevOps Team 2020-07-07 19:28:10 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-2019-20636

Comment 28 errata-xmlrpc 2020-09-29 18:59:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4062 https://access.redhat.com/errata/RHSA-2020:4062

Comment 29 errata-xmlrpc 2020-09-29 20:53:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4060 https://access.redhat.com/errata/RHSA-2020:4060

Comment 46 errata-xmlrpc 2020-11-04 00:50:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4431 https://access.redhat.com/errata/RHSA-2020:4431

Comment 47 errata-xmlrpc 2020-11-04 02:23:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4609 https://access.redhat.com/errata/RHSA-2020:4609

Comment 50 errata-xmlrpc 2020-12-15 08:55:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2020:5430 https://access.redhat.com/errata/RHSA-2020:5430

Comment 51 errata-xmlrpc 2020-12-22 09:32:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2020:5656 https://access.redhat.com/errata/RHSA-2020:5656

Comment 53 errata-xmlrpc 2021-01-05 10:20:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2021:0019 https://access.redhat.com/errata/RHSA-2021:0019