Advisory Details

April 3rd, 2015

(Pwn2Own) Mozilla Firefox SVG DOMAttrModified Same-Origin Policy Bypass Vulnerability

ZDI-15-108
ZDI-CAN-2825

CVE ID CVE-2015-0818
CVSS SCORE 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS Mozilla
AFFECTED PRODUCTS Firefox
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['19607']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to bypass the same-origin policy on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of SVG format content navigation. By using a DOMAttrModified mutation event listener, an attacker can inject an arbitrary URL into the history, and cause Firefox to break the same-origin isolation policy.
ADDITIONAL DETAILS Mozilla has issued an update to correct this vulnerability. More details can be found at:
https://bugzilla.mozilla.org/show_bug.cgi?id=1144988
DISCLOSURE TIMELINE
  • 2015-03-18 - Vulnerability reported to vendor
  • 2015-04-03 - Coordinated public release of advisory
CREDIT Mariusz Mlynski
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