Bug 1361984 – CVE-2016-5259 Mozilla: Use-after-free in service workers with nested sync events (MFSA 2016-73)

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Bug 1361984 - (CVE-2016-5259) CVE-2016-5259 Mozilla: Use-after-free in service workers with nested sync events (MFSA 2016-73)

Summary:	CVE-2016-5259 Mozilla: Use-after-free in service workers with nested sync eve...

Status:	CLOSED ERRATA

Aliases:	CVE-2016-5259

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	urgent Severity urgent
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=critical,public=20160802,repor...
Keywords:	Security

Depends On:
Blocks:	1360577
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Reported:	2016-08-01 02:31 EDT by Huzaifa S. Sidhpurwala
Modified:	2016-09-23 01:33 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
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Story Points:	---
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Environment:
Last Closed:	2016-09-23 01:33:00 EDT
Type:	---
Regression:	---
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Documentation:	---
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:1551	normal	SHIPPED_LIVE	Critical: firefox security update	2016-08-03 08:06:43 EDT

Groups: None (edit)

Description Huzaifa S. Sidhpurwala 2016-08-01 02:31:02 EDT

Security researcher Looben Yang discovered a use-after-free vulnerability when working with nested sync event loops in Service Workers. He discovered a mechanism where scripts can close their own worker, which will then trigger a synchronization XMLHttpRequest on this now closed and released worker. This results in a potentially exploitable crash when triggered. 


External Reference:

https://www.mozilla.org/security/announce/2016/mfsa2016-73.html


Acknowledgements:

Name: the Mozilla project
Upstream: Looben Yang

Comment 1 errata-xmlrpc 2016-08-03 04:08:57 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2016:1551 https://rhn.redhat.com/errata/RHSA-2016-1551.html

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