Bug 1819146 (CVE-2019-9453)

Summary:	CVE-2019-9453 kernel: out of bounds read in F2FS touch driver leads to local information disclosure
Product:	[Other] Security Response	Reporter:	msiddiqu
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, 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, mlangsdo, nmurray, qzhao, 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:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-08 12:34:17 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:	1819149
Bug Blocks:	1750356, 1819151

Description msiddiqu 2020-03-31 10:24:57 UTC

A vulnerability was found in F2FS touch driver in kernel where there is a possible out of bounds
read due to improper input validation. This could lead to local information
disclosure with system execution privileges needed. User interaction is not
needed for exploitation.

Upstream patch:
https://lore.kernel.org/patchwork/patch/1060480/

References:
https://source.android.com/security/bulletin/pixel/2019-09-01

Comment 1 msiddiqu 2020-03-31 10:25:47 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1819149]

Comment 2 Justin M. Forbes 2020-03-31 13:56:41 UTC

This was fixed for Fedora with the 5.1.12 stable kernel updates.

Comment 3 Alex 2020-04-08 11:36:31 UTC

For F2FS (file system) that is disabled for all rhel* versions,
the configuration param that is disabled:
"# CONFIG_F2FS_FS is not set"