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Vulnerability of AVG AntiVirus: information disclosure via Chrome Extension

Synthesis of the vulnerability 

An attacker can use a vulnerability in the Chrome extension of AVG AntiVirus, in order to obtain sensitive information.
Vulnerable products: AVG AntiVirus.
Severity of this weakness: 2/4.
Creation date: 29/12/2015.
Références of this bulletin: VIGILANCE-VUL-18606.

Description of the vulnerability 

The AVG AntiVirus product installs the "AVG Web TuneUp" extension in Chrome, in order to monitor web activities.

However, an attacker can send JavaScript messages to this extension, to bypass access restrictions to data.

An attacker can therefore use a vulnerability in the Chrome extension of AVG AntiVirus, in order to obtain sensitive information.
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This computer threat alert impacts software or systems such as AVG AntiVirus.

Our Vigil@nce team determined that the severity of this weakness announce is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this computer weakness bulletin.

Solutions for this threat 

AVG AntiVirus Chrome Extension: version 4.2.5.169.
The version 4.2.5.169 of "AVG Web TuneUp" is fixed.
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