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AUSCERT Security Bulletin
ASB-2015.0078
A critical vulnerability has been identified in Mozilla Firefox
7 August 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: Mozilla Firefox
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Access Privileged Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2015-4495
Member content until: Sunday, September 6 2015
Comment: Mozilla have reported that exploits exist in the wild targeting this
vulnerability.
OVERVIEW
A critical vulnerability has been identified in Mozilla Firefox prior
to versions 39.0.3 and ESR 38.1.1. [1]
IMPACT
The vendor has provided the following details regarding these
issues:
CVE-2015-4495: "Security researcher Cody Crews reported on a way to
violate the same origin policy and inject script into a
non-privileged part of the built-in PDF Viewer. This would allow an
attacker to read and steal sensitive local files on the victim's
computer." [1]
MITIGATION
The vendor recommends updating to the latest versions of Mozilla
Firefox to correct this issue. [1]
REFERENCES
[1] Mozilla Foundation Security Advisory 2015-78 - Same origin
violation and local file stealing via PDF reader
https://www.mozilla.org/en-US/security/advisories/mfsa2015-78/
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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