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T-729: Mozilla Code Installation Through Holding Down Enter

September 29, 2011 - 8:30am

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PROBLEM:

Mozilla Code Installation Through Holding Down Enter.

PLATFORM:

Versions prior to the following are vulnerable:
Firefox 7.0
Firefox 3.6.23
Thunderbird 7.0
SeaMonkey 2.4

ABSTRACT:

Attackers can exploit this issue by enticing an unsuspecting victim into viewing and interacting with a malicious Web page. An attacker may be able to exploit this issue to bypass a confirmation dialog and install an arbitrary add-on. This may aid in further attacks.

reference LINKS:

Mozilla Foundation Security Advisory 2011-40
Firefox Security Advisories
CVE-2011-2372
CVE-2011-3001

IMPACT ASSESSMENT:

High

Discussion:

If a user holds down the Enter key--as part of a game or test, perhaps--a malicious page could pop up a download dialog where the held key would then activate the default Open action. For some file types this would be merely annoying (the equivalent of a pop-up) but other file types have powerful scripting capabilities. And this would provide an avenue for an attacker to exploit a vulnerability in applications not normally exposed to potentially hostile internet content. There is a similar flaw with manual plugin installation using the PLUGINSPAGE attribute. It was possible to create an internal error that suppressed a confirmation dialog, such that holding enter would lead to the installation of an arbitrary add-on. (This variant did not affect Firefox 3.6)

Impact:

Attackers can exploit this issue by enticing an unsuspecting victim into viewing and interacting with a malicious Web page. An attacker may be able to exploit this issue to bypass a confirmation dialog and install an arbitrary add-on. This may aid in further attacks.

Solution:

Updating Firefox
The vendor has Fixed:
Firefox 7.0
Firefox 3.6.23
Thunderbird 7.0
SeaMonkey 2.4

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