Advisory Details

September 13th, 2010

Mozilla Firefox normalizeDocument Remote Code Execution Vulnerability

ZDI-10-176
ZDI-CAN-866

CVE ID CVE-2010-2766
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Mozilla Firefox
AFFECTED PRODUCTS 3.6.x
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10463. 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 flaw exists within the normalizeDocument function defined within nsDocument.cpp. When handling children nodes the code does not account for a varying number of children during normalization. An attacker can abuse this problem along with the fact that the code does not validate the child index is within bounds to access an invalid object and execute arbitrary code under the context of the browser.

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/mfsa2010-55.html
DISCLOSURE TIMELINE
  • 2010-07-20 - Vulnerability reported to vendor
  • 2010-09-13 - Coordinated public release of advisory
CREDIT regenrecht
BACK TO ADVISORIES