Bug 1775074 (CVE-2019-19055)

Summary:	CVE-2019-19055 kernel: memory leak in the nl80211_get_ftm_responder_stats() function in net/wireless/nl80211.c allows DoS
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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, yozone
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 Wireless configuration API functionality mishandles resource cleanup in nl80211_get_ftm_responder_stats function. An attacker able to trigger the resource cleanup code path 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:	2020-09-29 21:59:04 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1775116, 1776606, 1829289, 1829290, 1829291, 1829292
Bug Blocks:	1775107

Description msiddiqu 2019-11-21 12:06:05 UTC

A memory leak in the nl80211_get_ftm_responder_stats() function innet/wireless/nl80211.c allows attackers tocause a denial of service (memory consumption) by triggering nl80211hdr_put() failures

Upstream commit:

https://github.com/torvalds/linux/commit/1399c59fa92984836db90538cf92397fe7caaa57

Comment 1 msiddiqu 2019-11-21 12:19:53 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775116]

Comment 3 Petr Matousek 2020-04-29 10:53:36 UTC

Statement:

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

Comment 4 Petr Matousek 2020-04-29 10:53:41 UTC

Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module cfg80211. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .

Comment 6 errata-xmlrpc 2020-09-29 18:58:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4062 https://access.redhat.com/errata/RHSA-2020:4062

Comment 7 errata-xmlrpc 2020-09-29 20:52:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4060 https://access.redhat.com/errata/RHSA-2020:4060

Comment 8 Product Security DevOps Team 2020-09-29 21:59:04 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-2019-19055