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Google Chrome Emergency Update Fixes Zero Days Used In Attacks

Google released Chrome 95.0.4638.69 for Windows, Mac, and Linux to patch two zero-day vulnerabilities that attackers actively exploited.

“Google is aware that exploits for CVE-2021-38000 and CVE-2021-38003 exist in nature,” Google revealed in today’s Google Chrome release security patch list.

While Google says the new version may take a while to reach everyone, the update has already started rolling out Chrome 95.0.4638.69 to users around the world in the Stable Desktop channel.

To install the Chrome update immediately, go to Chrome menu > To help > About Google Chrome, and the browser will start to update.

Chrome 95.0.4638.69 was installed immediately
Chrome 95.0.4638.69 was installed immediately

Google Chrome will also check for available updates and install them the next time you launch the web browser.

Details of zero-day attacks are not disclosed

This version of Chrome fixes a total of seven vulnerabilities, two of which are zero-day vulnerabilities known to have been exploited in the wild.

The first zero-day, followed as CVE-2021-38000, is described as “insufficient validation of unreliable intents entries” and has been assigned a high severity rating. This vulnerability was discovered by Clement Lecigne, Neel Mehta, and Maddie Stone of Google Threat Analysis Group on September 15, 2021.

The second day zero, followed as CVE-2021-38003, is a high severity “Inappropriate Implementation” bug in the Chrome V8 JavaScript engine. This vulnerability was also discovered by Lecigne and reported on October 24.

At this time, Google or the researchers have not provided further details on how the threat actors used the vulnerabilities in the attacks. However, as Google discovered the vulnerabilities, we may learn more in future reports from Google TAG or Project Zero.

Since both vulnerabilities have been used in attacks, it is suggested that all Chrome users perform a manual upgrade or restart their browser to install the latest version.

Fifteenth zero-day corrected this year

With these fixes, Google fixed 15 zero-day vulnerabilities in Chrome since the start of 2021.

The thirteen other zero-days corrected this year are listed below:

  • CVE-2021-21148 – February 4, 2021
  • CVE-2021-21166 – March 2, 2021
  • CVE-2021-21193 – March 12, 2021
  • CVE-2021-21220 – April 13, 2021
  • CVE-2021-21224 – April 20, 2021
  • CVE-2021-30551 – June 9, 2021
  • CVE-2021-30554 – June 17, 2021
  • CVE-2021-30563 – July 15, 2021
  • CVE-2021-30632 and CVE-2021-30633 – September 13
  • CVE-2021-37973 – September 24, 2021
  • CVE-2021-37976 and CVE-2021-37975 – September 30, 2021

Since Google now offers Chrome updates to fix zero days as they are reported, users are strongly advised not to block updates and install new versions as soon as possible. that they are available.