bugtraq - ZDI-10-019: Mozilla Firefox showModalDialog Cross-Domain Scripting Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B046110388145859@emb01.unity.local>
Date: Fri, 19 Feb 2010 13:22:31 -0600
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>,
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-019: Mozilla Firefox showModalDialog Cross-Domain Scripting
 Vulnerability

ZDI-10-019: Mozilla Firefox showModalDialog Cross-Domain Scripting Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-019
February 19, 2010

-- CVE ID:
CVE-2009-3988

-- Affected Vendors:
Mozilla Firefox

-- Affected Products:
Mozilla Firefox 3.0.x

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 8399. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to bypass specific script
execution enforcements on vulnerable installations of Mozilla Firefox.
User interaction is required to exploit this vulnerability in that the
target must visit a malicious page.

The specific flaw exists in the lack of cross domain policy enforcement.
Through usage of the showModalDialog() JavaScript method an attacker can
gather sensitive information from another website. This vulnerability
can be exploited to obtain website credentials not originating from the
attacking site.

-- Vendor Response:
Mozilla Firefox has issued an update to correct this vulnerability. More
details can be found at:

http://www.mozilla.org/security/announce/2010/mfsa2010-04.html

-- Disclosure Timeline:
2009-08-06 - Vulnerability reported to vendor
2010-02-19 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/