Author: Melodie Foster

Date: 17th May 2021


Google have reported that all the flaws affect the Windows, MacOS and Linux versions of the Chrome browser. Google also mentioned that it is aware of one of the flaws, which was a zero-day, is being exploited in the wild.

This zero-day flaw stems from a use-after-free bug in Blink which is a rendering engine used by Chromium.  The vulnerability could be exploited by a remote attacker tricking a victim into visiting a specifically crafted website and then either executing arbitrary code or causing a Denial of Service attack on the vulnerable system. It has been given a CVSS score of 8.8 out of 10 meaning it is of high severity.

The other flaws include another high severity use-after free flaw which is in WebRTC. This gives web browsers communication abilities like voice and chat. Another one included a high severity buffer overflow error.

Further details on these vulnerabilities are not available yet as Google have said that “access to bug details and links may be kept restricted until a majority of users are updated with a fix.”

Following a report from Menlo Security which states that most Chrome users take about a month to update Chrome, Google is urging customers to patch the vulnerabilities and upgrade to the latest version which is 89.0.4389.90 [1].



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