Bug 1920650 (CVE-2021-23960)

Summary:	CVE-2021-23960 Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC
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:	cschalle, erack, gecko-bugs-nobody, jhorak, stransky, tpopela
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	firefox 78.7, thunderbird 78.7	Doc Type:	If docs needed, set a value
Doc Text:	The Mozilla Foundation Security Advisory describes this flaw as: Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-01-27 20:41:43 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:	1919188, 1919189, 1919190, 1919191, 1919192, 1920635, 1920636, 1920637, 1920638, 1920640
Bug Blocks:	1919186

Description msiddiqu 2021-01-26 19:29:52 UTC

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23960

Comment 1 msiddiqu 2021-01-26 19:29:57 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Irvan Kurniawan

Comment 2 errata-xmlrpc 2021-01-27 16:47:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:0285 https://access.redhat.com/errata/RHSA-2021:0285

Comment 3 errata-xmlrpc 2021-01-27 17:55:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:0288 https://access.redhat.com/errata/RHSA-2021:0288

Comment 4 errata-xmlrpc 2021-01-27 18:00:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:0289 https://access.redhat.com/errata/RHSA-2021:0289

Comment 5 errata-xmlrpc 2021-01-27 18:35:23 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:0290 https://access.redhat.com/errata/RHSA-2021:0290

Comment 6 Product Security DevOps Team 2021-01-27 20:41:43 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-2021-23960

Comment 7 errata-xmlrpc 2021-01-28 16:10:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:0297 https://access.redhat.com/errata/RHSA-2021:0297

Comment 8 errata-xmlrpc 2021-01-28 16:30:43 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:0298 https://access.redhat.com/errata/RHSA-2021:0298

Comment 9 errata-xmlrpc 2021-01-28 16:35:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:0299 https://access.redhat.com/errata/RHSA-2021:0299

Comment 10 errata-xmlrpc 2021-02-03 10:43:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:0397 https://access.redhat.com/errata/RHSA-2021:0397