Bug 1257276 – CVE-2015-4497 Mozilla: Use-after-free when resizing canvas element during restyling (MFSA 2015-94)

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Bug 1257276 - (CVE-2015-4497) CVE-2015-4497 Mozilla: Use-after-free when resizing canvas element during restyling (MFSA 2015-94)

Summary:	CVE-2015-4497 Mozilla: Use-after-free when resizing canvas element during res...

Status:	CLOSED ERRATA

Aliases:	CVE-2015-4497

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=20150827,repor...
Keywords:	Security

Depends On:
Blocks:	1257106
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Reported:	2015-08-26 11:52 EDT by Huzaifa S. Sidhpurwala
Modified:	2016-01-22 08:55 EST (History)
CC List:	4 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-08-28 00:50:08 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-2015:1693	normal	SHIPPED_LIVE	Critical: firefox security update	2015-08-27 21:18:01 EDT

Groups: None (edit)

Description Huzaifa S. Sidhpurwala 2015-08-26 11:52:18 EDT

Mozilla community member Jean-Max Reymond discovered a use-after-free vulnerability with a <canvas> element on a page. This occurs when a resize event is triggered in concert with style changes but the canvas references have been recreated in the meantime, destroying the originally referenced context. This results in an exploitable crash.

Ucha Gobejishvili, working with HP's Zero Day Initiative, subsequently reported this same issue.


External Reference:

https://www.mozilla.org/security/announce/2015/mfsa2015-94.html


Acknowledgements:

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Jean-Max Reymond and Ucha Gobejishvili as the original reporter.

Comment 1 errata-xmlrpc 2015-08-27 17:18:33 EDT

This issue has been addressed in the following products:

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

Via RHSA-2015:1693 https://rhn.redhat.com/errata/RHSA-2015-1693.html

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