Bug 1776372 (CVE-2019-19080)

Summary:	CVE-2019-19080 kernel: memory leaks in the nfp_flower_spawn_phy_reprs() function in drivers/net/ethernet/netronome/nfp/flower/main.c leads to DoS
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
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, 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 way the NFP4000/NFP6000 TC Flower offload functionality in the Linux kernel handled memory cleanup on failures. This flaw allows an attacker to cause a denial of service and crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 22:13:20 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:	1776373, 1820496, 1820497, 1820498, 1820499
Bug Blocks:	1776374

Description Guilherme de Almeida Suckevicz 2019-11-25 14:37:24 UTC

Four memory leaks in the nfp_flower_spawn_phy_reprs() function in drivers/net/ethernet/netronome/nfp/flower/main.c in the Linux kernel before 5.3.4 allow attackers to cause a denial of service (memory consumption), aka CID-8572cea1461a.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/8572cea1461a006bce1d06c0c4b0575869125fa4

Comment 1 Guilherme de Almeida Suckevicz 2019-11-25 14:38:10 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776373]

Comment 2 Justin M. Forbes 2019-11-25 15:55:39 UTC

This was fixed for Fedora with the 5.3.4 stable kernel updates.

Comment 3 Petr Matousek 2020-04-03 08:03:45 UTC

Statement:

This issue is rated as having Low impact because of the low memory conditions needed to trigger this issue.

Comment 4 Petr Matousek 2020-04-03 08:03:49 UTC

Mitigation:

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