Bug 1926918 (CVE-2021-1721)

Summary:	CVE-2021-1721 dotnet: certificate chain building recursion Denial of Service
Product:	[Other] Security Response	Reporter:	Stefan Cornelius <scorneli>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	andrew.slice, bodavis, dbhole, kanderso, maltron, omajid, rwagner, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	dotnet runtime 2.1.25, dotnet sdk 2.1.521, dotnet runtime 3.1.12, dotnet sdk 3.1.112, dotnet runtime 5.0.3, dotnet sdk 5.0.103	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in dotnet. A recursion error when building X.509 certificate chains can lead to a stack overflow which could crash the system. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-10 22:09:47 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:	1921938, 1922272, 1923368, 1923377, 1924761, 1924765
Bug Blocks:	1926911

Description Stefan Cornelius 2021-02-09 16:35:38 UTC

A recursion error when building X509 certificate chains was discovered, which, after a long time, can ultimately lead to a stack overflow. A malicious remote attacker could exploit this to cause a crash.

Comment 7 Stefan Cornelius 2021-02-09 18:33:17 UTC

External References:

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1721
https://github.com/dotnet/announcements/issues/175

Comment 8 errata-xmlrpc 2021-02-10 16:37:40 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:0471 https://access.redhat.com/errata/RHSA-2021:0471

Comment 9 errata-xmlrpc 2021-02-10 16:59:01 UTC

This issue has been addressed in the following products:

  .NET Core on Red Hat Enterprise Linux

Via RHSA-2021:0470 https://access.redhat.com/errata/RHSA-2021:0470

Comment 10 errata-xmlrpc 2021-02-10 16:59:49 UTC

This issue has been addressed in the following products:

  .NET Core on Red Hat Enterprise Linux

Via RHSA-2021:0472 https://access.redhat.com/errata/RHSA-2021:0472

Comment 11 errata-xmlrpc 2021-02-10 17:00:26 UTC

This issue has been addressed in the following products:

  .NET Core on Red Hat Enterprise Linux

Via RHSA-2021:0473 https://access.redhat.com/errata/RHSA-2021:0473

Comment 12 errata-xmlrpc 2021-02-10 17:29:37 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:0474 https://access.redhat.com/errata/RHSA-2021:0474

Comment 13 errata-xmlrpc 2021-02-10 17:36:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:0476 https://access.redhat.com/errata/RHSA-2021:0476

Comment 14 Product Security DevOps Team 2021-02-10 22:09:47 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-2021-1721