Security Experts:

Google Patches Four Severe Vulnerabilities in Chrome

Google this week announced the release of an updated Chrome version for Windows, Mac and Linux, to address a total of four high-severity vulnerabilities in the browser.

Tracked as CVE-2021-37977, the most severe of these security holes could be exploited to achieve arbitrary code execution on a target system.

The flaw, described as a use-after-free bug in Garbage Collection, was reported last month by an anonymous researcher. Google says it paid a $10,000 bounty reward for the finding.

Now rolling out to desktop users as Chrome version 94.0.4606.81, the new browser iteration also addresses two heap buffer overflow vulnerabilities in Blink (CVE-2021-37978) and WebRTC (CVE-2021-37979).

The issues were reported by Yangkang (@dnpushme) of 360 ATA and Marcin Towalski of Cisco Talos, respectively. Google says it handed out $7,500 to each of the reporting researchers.

A fourth high-severity bug addressed with the new Chrome release is CVE-2021-37980, an inappropriate implementation in Sandbox. Yonghwi Jin (@jinmo123), the reporting researcher, received a $3,000 bounty reward for the finding.

Attackers could exploit these vulnerabilities through specially crafted webpages to compromise a visitor’s system and potentially execute code in the context of the browser.

Google says the Chrome extended stable channel too was updated to version 94.0.4606.81 for Windows and Mac.

The search giant made no mention of any of these vulnerabilities being exploited in targeted attacks. So far this year, however, there have been more than a dozen documented zero-day exploits targeting the Chrome and Android platforms.

Related: Google Patches Two More Exploited Zero-Day Vulnerabilities in Chrome

Related: Google Warns of Exploited Zero-Days in Chrome Browser

Related: Google Working on Improving Memory Safety in Chrome

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