Debian Security Advisory 1344-1 - "moz_bug_r_a4" discovered that a regression in the handling of "about:blank" windows used by addons may lead to an attacker being able to modify the content of web sites. Jesper Johansson discovered that missing sanitizing of double-quotes and spaces in URIs passed to external programs may allow an attacker to pass arbitrary arguments to the helper program if the user is tricked into opening a malformed web page.
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