Google fixes 2 new actively exploited zero-day flaws in Chrome

Google rolled out urgent security updates to address two new actively exploited zero-day vulnerabilities in its Chrome browser.

Google this week rolled out urgent security updates for the Chrome browser to address four security flaws, including two new zero-day vulnerabilities that are being exploited in the wild.

Google has addressed a total of five zero-day flaws this month, while the total number of zero-days fixed since the start of the year is 14.

The two zero-day vulnerabilities fixed in the last turn are tracked as CVE-2021-37975 and CVE-2021-37976.

The CVE-2021-37975 flaw is a use after free that resides in the V8 JavaScript engine, it was reported by an anonymous researcher. The CVE-2021-37976 is an Information leak that resides in the core, it was reported by Clément Lecigne from Google TAG, with technical assistance from Sergei Glazunov and Mark Brand from Google Project Zero on 2021-09-21.

The Google Threat Analysis Group (TAG) focuses on investigations into government-backed attacks, it is likely that the CVE-2021-37976 was discovered while the experts were investigating a campaign carried out by a nation-state actor.

“We would also like to thank all security researchers that worked with us during the development cycle to prevent security bugs from ever reaching the stable channel.” states the update provided by Google. “Google is aware the exploits for CVE-2021-37975 and CVE-2021-37976 exist in the wild. “

Google has addressed a total of 14 zero-day vulnerabilities in Google Chrome since the start of the year, below is the full list.

• CVE-2021-21148 – February 4th, 2021
• CVE-2021-21166 – March 2nd, 2021
• CVE-2021-21193 – March 12th, 2021
• CVE-2021-21220 – April 13th, 2021
• CVE-2021-21224 – April 20th, 2021
• CVE-2021-30551 – June 9th, 2021
• CVE-2021-30554 – June 17th, 2021
• CVE-2021-30554 – June 17th, 2021
• CVE-2021-30563 – July 15th, 2021
• CVE-2021-30632 & CVE-2021-30633 – Sept 13th, 2021
• CVE-2021-37973 – Sept 24th, 2021
• CVE-2021-37975 and CVE-2021-37976 – Oct, 13st, 2021

Be sure to update your Chrome install to the latest 94.0.4606.71 version for Windows, Mac, and Linux.

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Pierluigi Paganini

(SecurityAffairs – hacking, Chrome)

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