Bug 1774976 (CVE-2019-19066)

Summary:	CVE-2019-19066 kernel: A memory leak in the bfad_im_get_stats() function in drivers/scsi/bfa/bfad_attr.c allows for a 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, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, pmatouse, 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 Linux kernel. The bfad_im_get_stats function mishandles resource cleanup on error. A local attacker, able to induce the error conditions, could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 22:13:15 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:	1774978, 1829907, 1829908, 1829911, 1829912, 1829913
Bug Blocks:	1774980

Description Marian Rehak 2019-11-21 11:01:02 UTC

A memory leak in the bfad_im_get_stats() function in drivers/scsi/bfa/bfad_attr.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering bfa_port_get_stats() failures.

Upstream Issue:

https://github.com/torvalds/linux/commit/0e62395da2bd5166d7c9e14cbc7503b256a34cb0

Comment 1 Marian Rehak 2019-11-21 11:01:36 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1774978]

Comment 3 Petr Matousek 2020-04-30 14:42:23 UTC

Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the error/resource cleanup code path.

Comment 4 Petr Matousek 2020-04-30 14:42:27 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.