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Vigil@nce - Firefox: audit bypassing via Extension-Reuse

April 2016 by Vigil@nce

SYNTHESIS OF THE VULNERABILITY

An attacker can create a malicious Firefox extension, and invite
the victim to install it, in order to perform operations through
other extensions already installed.

Impacted products: Firefox, SeaMonkey.

Severity: 1/4.

Creation date: 05/04/2016.

DESCRIPTION OF THE VULNERABILITY

The Mozilla team setup an audit process, in order to validate
extensions published on https://addons.mozilla.org/

However, a malicious extension can use low level features of other
extensions already audited, approved, and installed on victim’s
computer..

An attacker can therefore create a malicious Firefox extension,
and invite the victim to install it, in order to perform
operations through other extensions already installed.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Firefox-audit-bypassing-via-Extension-Reuse-19300


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