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Mozilla Foundation Security Advisory 2012-103

Frames can shadow top.location

Announced
November 20, 2012
Reporter
Mariusz Mlynski
Impact
High
Products
Firefox, Firefox ESR, SeaMonkey, Thunderbird, Thunderbird ESR
Fixed in
  • Firefox 17
  • Firefox ESR 10.0.11
  • SeaMonkey 2.14
  • Thunderbird 17
  • Thunderbird ESR 10.0.11

Description

Security researcher Mariusz Mlynski reported that the location property can be accessed by binary plugins through top.location with a frame whose name attribute's value is set to "top". This can allow for possible cross-site scripting (XSS) attacks through plugins.

In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.

References