Oh no, you're thinking, yet another cookie pop-up. Well, sorry, it's the law. We measure how many people read us, and ensure you see relevant ads, by storing cookies on your device. If you're cool with that, hit “Accept all Cookies”. For more info and to customize your settings, hit “Customize Settings”.

Review and manage your consent

Here's an overview of our use of cookies, similar technologies and how to manage them. You can also change your choices at any time, by hitting the “Your Consent Options” link on the site's footer.

Manage Cookie Preferences
  • These cookies are strictly necessary so that you can navigate the site as normal and use all features. Without these cookies we cannot provide you with the service that you expect.

  • These cookies are used to make advertising messages more relevant to you. They perform functions like preventing the same ad from continuously reappearing, ensuring that ads are properly displayed for advertisers, and in some cases selecting advertisements that are based on your interests.

  • These cookies collect information in aggregate form to help us understand how our websites are being used. They allow us to count visits and traffic sources so that we can measure and improve the performance of our sites. If people say no to these cookies, we do not know how many people have visited and we cannot monitor performance.

See also our Cookie policy and Privacy policy.

This article is more than 1 year old

Avast pulls plug on insecure JavaScript engine in its security software suite

Code interpreter ran with admin-level access, not sand-boxed, potentially open to remote-code execution

Avast has disabled a component in its Windows anti-malware suite that posed, ironically enough, a significant security risk.

The software maker switched off the JavaScript interpreter in its toolkit after Google Project Zero's Tavis Ormandy, and his colleagues, alerted the developer to design flaws in the code.

According to Avast, Ormandy potentially found a remote-code execution vulnerability in the software, the details of which were not publicly shared. Five days later, the Googler released a shell for poking around in Avast's JavaScript engine for anyone interested in assessing the antivirus suite. He also revealed that if miscreants were able to exploit any holes in Avast's JS engine on a victim's computer, they would be able to run malware on that PC with system-admin-level privileges.

"Despite being highly privileged and processing untrusted input by design, it is unsandboxed and has poor mitigation coverage," Ormandy explained earlier this week. It should be noted Ormandy did not disclose any specific bugs.

A couple days after the analysis tool was released, the vendor opted to do away with the emulator entirely. It does not believe the removal will significantly impact the suite's ability to detect malware. The swift action was applauded by Ormandy.

Praise from the security community has been hard for Avast to come by lately. Earlier this week, the vendor took heat after it was revealed its AntiTrack tool contained security blunders that could have been exploited by man-in-the-middle snoopers to eavesdrop on supposedly secure website connections. ®

Similar topics

TIP US OFF

Send us news


Other stories you might like