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Mozilla Foundation Security Advisory 2013-94

Spoofing addressbar though SELECT element

Announced
October 29, 2013
Reporter
Jordi Chancel
Impact
Moderate
Products
Firefox, Firefox ESR, SeaMonkey, Thunderbird
Fixed in
  • Firefox 25
  • Firefox ESR 24.1
  • SeaMonkey 2.22
  • Thunderbird 24.1

Description

Security researcher Jordi Chancel discovered a method to put arbitrary HTML content within <select> elements and place it in arbitrary locations. This can be used to spoof the displayed addressbar, leading to clickjacking and other spoofing attacks.

In general this flaw cannot be exploited through email in the Thunderbird and Seamonkey products because scripting is disabled, but is potentially a risk in browser or browser-like contexts.

References