‫ Vulnerability in AVG security toolbar puts IE users at risk


Number: IRCNE2014072245
Date: 2014-07-11

According to “techworld”, implementation issues with AVG Secure Search, a browser toolbar from antivirus vendor AVG Technologies that's supposed to protect users from malicious websites, could have allowed remote attackers to execute malicious code on computers.

The toolbar, also known as AVG SafeGuard, supports Google Chrome, Internet Explorer and Mozilla Firefox running on Windows XP and later, and is often bundled as an optional installation with popular free software programs.

According to researchers from the CERT Coordination Center (CERT/CC) at Carnegie Mellon University, versions 18.1.6 and older of AVG Secure Search and AVG SafeGuard install an ActiveX control called ScriptHelperApi in Internet Explorer that exposes sensitive functionality to websites.

All these conditions make it possible for an attacker to execute malicious code on the computer of a user who has a vulnerable version of AVG Secure Search installed, if the user opens a specifically crafted HTML Web page, email message or attachment in Internet Explorer. The rogue code would be executed with the privileges of the logged-in user, Dormann said.

AVG fixed the security issue in AVG Secure Search 18.1.7.598 and AVG Safeguard 18.1.7.644 released in May. It's not clear if the toolbar updates itself, so users should make sure that they download and install the latest version if they intend to keep using it.

"If you must use a service known for bundling adware into their installers, pay careful attention to the installation steps to make sure to opt out of any additional software choices provided," Dormann said. "Even installing applications such as Oracle Java or Adobe Flash may result in unwanted software, such as browser toolbars, if you are not careful."

 

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