Bug 1745536 (CVE-2019-15219)

Summary:	CVE-2019-15219 kernel: null pointer dereference in drivers/usb/misc/sisusbvga/sisusb.c driver
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, 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, 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:	A NULL pointer dereference flaw was found in the way the USB2VGA dongles driver in the Linux kernel handled failed initialization. This flaw allows an attacker able to insert USB2VGA dongles into the system to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 09:53:08 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:	1745543, 1820440, 1820441, 1820442, 1820443, 1820444
Bug Blocks:	1745542

Description Dhananjay Arunesh 2019-08-26 10:41:56 UTC

A vulnerability was found in the Linux kernel. There is a NULL pointer dereference caused by a malicious USB device in the drivers/usb/misc/sisusbvga/sisusb.c driver.

Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.8
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9a5729f68d3a82786aea110b1bfe610be318f80a
https://syzkaller.appspot.com/bug?id=aaf6794922521df1c35c81e32cb2d0bb6a351e7b

Comment 1 Dhananjay Arunesh 2019-08-26 10:47:21 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1745543]

Comment 2 Justin M. Forbes 2019-08-26 13:18:31 UTC

This was fixed for Fedora with the 5.1.8 stable kernel updates.

Comment 3 Petr Matousek 2020-04-03 05:28:11 UTC

Statement:

This issue is rated as having Low impact because of the physical access needed to trigger this issue. Also, failed initialization with the core USB subsystem is also a rare event to hit.

Comment 4 Petr Matousek 2020-04-03 05:35:58 UTC

Mitigation:

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