Bug 1690677 (CVE-2019-9792)

Summary:	CVE-2019-9792 Mozilla: IonMonkey leaks JS_OPTIMIZED_OUT magic value to script
Product:	[Other] Security Response	Reporter:	Doran Moppert <dmoppert>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	urgent
Version:	unspecified	CC:	cschalle, gecko-bugs-nobody, jhorak, stransky
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:51:22 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:	1688866, 1688867, 1688868, 1690494, 1690495, 1690496, 1690692, 1703888, 1703893, 1703894
Bug Blocks:	1688735, 1690493

Description Doran Moppert 2019-03-20 02:14:27 UTC

The IonMonkey just-in-time (JIT) compiler can leak an internal `JS_OPTIMIZED_OUT` magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/#CVE-2019-9792

Comment 1 Doran Moppert 2019-03-20 02:14:30 UTC

Acknowledgments:

Name: the Mozilla project
Upstream: Samuel Groß (Google Project Zero)

Comment 3 errata-xmlrpc 2019-03-20 15:11:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0622 https://access.redhat.com/errata/RHSA-2019:0622

Comment 4 errata-xmlrpc 2019-03-20 15:21:49 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2019:0623 https://access.redhat.com/errata/RHSA-2019:0623

Comment 5 Doran Moppert 2019-03-26 06:23:35 UTC

Statement:

In general, this flaw be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.

Comment 6 errata-xmlrpc 2019-03-28 14:48:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2019:0680 https://access.redhat.com/errata/RHSA-2019:0680

Comment 7 errata-xmlrpc 2019-03-28 14:49:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0681 https://access.redhat.com/errata/RHSA-2019:0681

Comment 9 errata-xmlrpc 2019-05-07 04:18:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:0966 https://access.redhat.com/errata/RHSA-2019:0966

Comment 10 errata-xmlrpc 2019-05-13 05:03:25 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:1144 https://access.redhat.com/errata/RHSA-2019:1144