Executive Summary

Summary
Title Mozilla Firefox SVG animation nsSMILTimeContainer use-after-free vulnerability
Informations
NameVU#791496First vendor Publication2016-11-30
VendorVU-CERTLast vendor Modification2016-12-02
Severity (Vendor) N/ARevisionM

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base ScoreN/AAttack RangeN/A
Cvss Impact ScoreN/AAttack ComplexityN/A
Cvss Expoit ScoreN/AAuthenticationN/A
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#791496

Mozilla Firefox SVG animation nsSMILTimeContainer use-after-free vulnerability

Original Release date: 30 Nov 2016 | Last revised: 02 Dec 2016

Overview

Mozilla Firefox contains a use-after-free vulnerability in the SVG animation functionality, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

Mozilla Firefox supports SVG animation through the use of SMIL. The nsSMILTimeContainer object contains a use-after-free vulnerability, which can allow arbitrary code execution.

Exploit code for this vulnerability is publicly available, which specifically targets the Tor Browser Bundle.

Impact

By convincing a use to view specially-crafted web content, a remote-unauthenticated attacker may be able to execute arbitrary code on an affected system.

Solution

Apply an update

This issue is addressed in Tor Browser 6.0.7 and Mozilla Firefox versions 50.0.2 and 45.5.1 ESR, as well as Thunderbird 45.5.1.

Disable JavaScript

This vulnerability can be mitigated by disabling JavaScript. This can be accomplished through use of the NoScript Firefox add-on.

Use the Microsoft Enhanced Mitigation Experience Toolkit

The Microsoft Enhanced Mitigation Experience Toolkit (EMET) can be used to help prevent exploitation of this and other vulnerabilities. Limited testing has shown that the following mitigations present in EMET 4.0 and later blog the public exploit for this vulnerability:

  • StackPivot
  • EAF
  • Caller

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
MozillaAffected-30 Nov 2016
TorAffected-30 Nov 2016
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

GroupScoreVector
Base7.5AV:N/AC:L/Au:N/C:P/I:P/A:P
Temporal6.5E:H/RL:OF/RC:C
Environmental6.5CDP:ND/TD:H/CR:ND/IR:ND/AR:ND

References

  • https://www.mozilla.org/en-US/security/advisories/mfsa2016-92/
  • https://hg.mozilla.org/mozilla-central/rev/adcc39e3cad0
  • https://bugzilla.mozilla.org/show_bug.cgi?id=1321066
  • https://blog.gdatasoftware.com/2016/11/29346-firefox-0-day-targeting-tor-users
  • http://support.microsoft.com/kb/2458544

Credit

This document was written by Will Dormann.

Other Information

  • CVE IDs:CVE-2016-9079
  • Date Public:29 Nov 2016
  • Date First Published:30 Nov 2016
  • Date Last Updated:02 Dec 2016
  • Document Revision:14

Feedback

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Original Source

Url : http://www.kb.cert.org/vuls/id/791496

Alert History

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0
1
2
DateInformations
2016-12-03 13:23:06
  • Multiple Updates
2016-12-02 21:23:15
  • Multiple Updates
2016-12-01 00:22:15
  • First insertion