Bug 1861646 (CVE-2020-15656)

Summary:	CVE-2020-15656 Mozilla: Type confusion for special arguments in IonMonkey
Product:	[Other] Security Response	Reporter:	Doran Moppert <dmoppert>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	cschalle, gecko-bugs-nobody, jhorak, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	thunderbird 78.1, firefox 78.1, firefox 79	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-08-20 03:15:23 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:	1870416, 1870417, 1870418, 1873379
Bug Blocks:	1861032

Description Doran Moppert 2020-07-29 07:03:21 UTC

JIT optimizations involving the Javascript `arguments` object could confuse later optimizations.
This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-33/#CVE-2020-15656

Comment 1 Doran Moppert 2020-07-29 07:03:25 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Carl Smith, working with Google Project Zero

Comment 2 Product Security DevOps Team 2020-08-20 03:15:23 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-2020-15656

Comment 3 errata-xmlrpc 2020-08-26 08:31:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:3555 https://access.redhat.com/errata/RHSA-2020:3555

Comment 4 errata-xmlrpc 2020-08-26 08:46:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:3557 https://access.redhat.com/errata/RHSA-2020:3557

Comment 5 errata-xmlrpc 2020-08-26 10:09:25 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:3559 https://access.redhat.com/errata/RHSA-2020:3559

Comment 7 errata-xmlrpc 2020-09-30 06:35:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:4080 https://access.redhat.com/errata/RHSA-2020:4080