Advisory Details

February 19th, 2010

Mozilla Firefox showModalDialog Cross-Domain Scripting Vulnerability

ZDI-10-019
ZDI-CAN-535

CVE ID CVE-2009-3988
CVSS SCORE 9.4, (AV:N/AC:L/Au:N/C:C/I:C/A:N)
AFFECTED VENDORS Mozilla Firefox
AFFECTED PRODUCTS 3.0.x
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8399. For further product information on the TippingPoint IPS: 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.

ADDITIONAL DETAILS 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 Anonymous
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