Bug 1774937 (CVE-2019-19073)

Summary:	CVE-2019-19073 kernel: Memory leaks in drivers/net/wireless/ath/ath9k/htc_hst.c in the Linux kernel (DOS)
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
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, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, qzhao, rkeshri, rt-maint, rvrbovsk, steved, williams, wmealing
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:	2020-04-28 16:34:46 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:	1774939, 1778571, 1778572, 1778573, 1778574, 1778575
Bug Blocks:	1774940

Description Marian Rehak 2019-11-21 10:17:38 UTC

Memory leaks in the kernels implementation of Host/Target communications of the atheros wifi driver in the Linux kernel which allows a local attacker to cause a denial of service (memory consumption) by triggering wait_for_completion_timeout() failures during device initialisation or USB device probing. 

This affects the htc_config_pipe_credits() function, the htc_setup_complete() function, and the htc_connect_service() function.

Upstream Reference:

https://github.com/torvalds/linux/commit/853acf7caf10b828102d92d05b5c101666a6142b

Comment 1 Marian Rehak 2019-11-21 10:18:32 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1774939]

Comment 7 Wade Mealing 2020-02-11 04:45:53 UTC

This is a memory leak, and it appears that the total leak size is a
once-off leak of 768 bytes (sizeof(struct sk_buff)) each time the module
is loaded.  Loading and unloading the module requires administrative
privileges, and is not something that a regular, non-privileged user can
do.  Even with physical access to plug/unplug the device, it still
requires the module to be unloaded and loaded again, and not simply for
the device to detach/reattach with the existing module, to trigger a new
leak.

Comment 9 errata-xmlrpc 2020-04-28 15:25:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1567 https://access.redhat.com/errata/RHSA-2020:1567

Comment 10 errata-xmlrpc 2020-04-28 15:51:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1769 https://access.redhat.com/errata/RHSA-2020:1769

Comment 11 Product Security DevOps Team 2020-04-28 16:34:46 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-2019-19073