Mozilla Foundation Security Advisory 2011-24
Title: Cookie isolation error
Announced: June 21, 2011
Reporter: David Chan
Products: Firefox, Thunderbird
Fixed in: Firefox 3.6.18
Mozilla security researcher David Chan reported
that cookies set for
example.com. (note the trailing dot)
example.com were treated as interchangeable. This is
a violation of same-origin conventions and could potentially lead to
leakage of cookie data to the wrong party.
This issue did not affect Firefox 4, SeaMonkey 2.1, or newer Mozilla-based products.