Advisory Details

April 3rd, 2015

(Pwn2Own) Mozilla Firefox resource: URL Remote Code Execution Vulnerability

ZDI-15-110
ZDI-CAN-2826

CVE ID CVE-2015-0816
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Mozilla
AFFECTED PRODUCTS Firefox
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 19609. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code 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 documents loaded through the resource: URL. As the same flag was used for chrome: and resource: URLs, these pages were able to subsequently load privileged chrome pages. By combining this with a same-origin policy bypass, an attacker could execute arbitrary code in the context of the current user.

VENDOR RESPONSE Mozilla has issued an update to correct this vulnerability. More details can be found at:
https://www.mozilla.org/en-US/security/advisories/mfsa2015-33/
DISCLOSURE TIMELINE
  • 2015-03-18 - Vulnerability reported to vendor
  • 2015-04-03 - Coordinated public release of advisory
CREDIT Mariusz Mlynski
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