Bug 1777449 (CVE-2019-18809)

Summary:	CVE-2019-18809 kernel: memory leak in af9005_identify_state() function in drivers/media/usb/dvb-usb/af9005.c
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, bdettelb, 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, 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:	A flaw was found in the Afatech 9005 DVB-T receiver driver in the Linux kernel. An attacker, with physical access to the system, could cause the system to crash following a resource cleanup. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:23:31 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:	1777451, 1825141, 1825142, 1825143
Bug Blocks:	1777490

Description Dhananjay Arunesh 2019-11-27 15:32:47 UTC

A memory leak in the af9005_identify_state() function in drivers/media/usb/dvb-usb/af9005.c in the Linux kernel allows attackers to cause a denial of service (memory consumption)

Reference:
https://github.com/torvalds/linux/commit/2289adbfa559050d2a38bcd9caac1c18b800e928

Comment 1 Dhananjay Arunesh 2019-11-27 15:34:07 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1777451]

Comment 3 Petr Matousek 2020-04-17 07:32:46 UTC

Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module dvb-usb-af9005. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278

Comment 5 errata-xmlrpc 2020-11-04 00:49:56 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 6 errata-xmlrpc 2020-11-04 02:22:07 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 7 Product Security DevOps Team 2020-11-04 02:23:31 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-2019-18809