Bug 1775042 (CVE-2019-19059)

Summary:	CVE-2019-19059 kernel: Multiple memory leaks in the iwl_pcie_ctxt_info_gen3_init() function in drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.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, 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 way the Intel Wireless driver in the Linux kernel handled resource cleanup during Gen 3 device initialization. This flaw allows an attacker with the ability to restrict access to DMA coherent memory on device initialization, to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-09-29 21:58:58 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:	1775043, 1776606, 1829391, 1829392, 1829393, 1829394
Bug Blocks:	1775045

Description Marian Rehak 2019-11-21 11:35:16 UTC

Multiple memory leaks in the iwl_pcie_ctxt_info_gen3_init() function in drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c in the Linux kernel through 5.3.11 allow attackers to cause a denial of service (memory consumption) by triggering iwl_pcie_init_fw_sec() or dma_alloc_coherent() failures.

Upstream Issue:

https://github.com/torvalds/linux/commit/0f4f199443faca715523b0659aa536251d8b978f

Comment 1 Marian Rehak 2019-11-21 11:35:45 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775043]

Comment 3 Petr Matousek 2020-04-29 13:30:40 UTC

Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (ability to restrict access to dma coherent memory on device initialization).

Comment 4 Petr Matousek 2020-04-29 13:30:44 UTC

Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module iwlwifi. 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 18:58:18 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 20:52:01 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 21:58:58 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-2019-19059