Bug 1820878 (CVE-2020-6820)

Summary:	CVE-2020-6820 Mozilla: Use-after-free when handling a ReadableStream
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	unspecified	CC:	c.handel, chorn, cschalle, gecko-bugs-nobody, jhorak, kyoshida, rtillery, security-response-team, sparks, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	firefox 68.6.1, firefox 74.0.1	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Mozilla's Firefox. A race condition can occur when handling a ReadableStream causing a use-after-free memory issue. The highest threat from this vulnerability are to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-07 10:32:22 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:	1820879, 1820880, 1820881, 1820882, 1820883, 1820884, 1820885, 1823642, 1823643, 1823644, 1823645, 1823646, 1823647, 1823648
Bug Blocks:	1820877

Description Huzaifa S. Sidhpurwala 2020-04-04 11:57:54 UTC

As per Mozilla upstream advisory:

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw.

Comment 1 Huzaifa S. Sidhpurwala 2020-04-04 11:57:59 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Francisco Alonso and Javier Marcos

Comment 2 Huzaifa S. Sidhpurwala 2020-04-04 11:58:02 UTC

External References:

https://www.mozilla.org/en-US/security/advisories/mfsa2020-11/#CVE-2020-6820

Comment 5 errata-xmlrpc 2020-04-07 07:38:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:1340 https://access.redhat.com/errata/RHSA-2020:1340

Comment 6 errata-xmlrpc 2020-04-07 08:44:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1341 https://access.redhat.com/errata/RHSA-2020:1341

Comment 7 errata-xmlrpc 2020-04-07 08:45:18 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2020:1339 https://access.redhat.com/errata/RHSA-2020:1339

Comment 8 errata-xmlrpc 2020-04-07 08:58:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1338 https://access.redhat.com/errata/RHSA-2020:1338

Comment 9 Product Security DevOps Team 2020-04-07 10:32:22 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-2020-6820

Comment 13 errata-xmlrpc 2020-04-16 10:03:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2020:1488 https://access.redhat.com/errata/RHSA-2020:1488

Comment 14 errata-xmlrpc 2020-04-16 10:03:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1489 https://access.redhat.com/errata/RHSA-2020:1489

Comment 15 errata-xmlrpc 2020-04-16 20:29:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:1496 https://access.redhat.com/errata/RHSA-2020:1496

Comment 16 errata-xmlrpc 2020-04-16 20:53:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1495 https://access.redhat.com/errata/RHSA-2020:1495