Bug 1775021 (CVE-2019-19062)

Summary:	CVE-2019-19062 kernel: memory leak in the crypto_report() function in crypto/crypto_user_base.c allows for 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, 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 crypto_report 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:	2020-07-07 19:27:41 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:	1775023, 1825132, 1825133, 1825136, 1829808, 1829809, 1829810, 1829811, 1829812
Bug Blocks:	1775024

Description Marian Rehak 2019-11-21 11:28:15 UTC

A memory leak in the crypto_report() function in crypto/crypto_user_base.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering crypto_report_alg() failures.

Upstream Issue:

https://github.com/torvalds/linux/commit/ffdde5932042600c6807d46c1550b28b0db6a3bc

Comment 1 Marian Rehak 2019-11-21 11:28:34 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775023]

Comment 2 Justin M. Forbes 2019-11-21 17:52:18 UTC

How is this a separate CVE? It seems a duplicate of CVE-2019-19050 rhbz 1774998

Comment 4 Petr Matousek 2020-04-30 12:13:12 UTC

Statement:

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

Comment 5 Petr Matousek 2020-04-30 12:13:18 UTC

Mitigation:

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

Comment 7 errata-xmlrpc 2020-07-07 13:18:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:2854 https://access.redhat.com/errata/RHSA-2020:2854

Comment 8 Product Security DevOps Team 2020-07-07 19:27:41 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-2019-19062

Comment 9 errata-xmlrpc 2020-09-29 18:58:17 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 10 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 26 errata-xmlrpc 2020-11-04 00:49:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4431 https://access.redhat.com/errata/RHSA-2020:4431

Comment 27 errata-xmlrpc 2020-11-04 02:21:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4609 https://access.redhat.com/errata/RHSA-2020:4609