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  • Google addresses critical security vulnerabilities in Chrome 66

Google addresses critical security vulnerabilities in Chrome 66

Pierluigi Paganini May 12, 2018

Google released an updated version of Chrome 66 that addresses a Critical security vulnerability that could be exploited by an attacker to take over a system.

Google released an updated version of Chrome 66 (version 66.0.3359.170) for Windows, Mac, and Linux systems that addressed 4 security vulnerabilities.

“This update includes 4 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.” reads the post published by Google.

  • [835887] Critical: Chain leading to sandbox escape. Reported by Anonymous on 2018-04-23:
  • [836858] High CVE-2018-6121: Privilege Escalation in extensions.
  • [836141] High CVE-2018-6122: Type confusion in V8.
  • [$5000][833721] High CVE-2018-6120: Heap buffer overflow in PDFium. Reported by Zhou Aiting(@zhouat1) of Qihoo 360 Vulcan Team on 2018-04-17″

Chrome 66 flaws

Three of the vulnerabilities were reported by external researchers, the most severe issues are a privilege escalation in extensions tracked as CVE-2018-6121 and a type confusion in V8 tracked as CVE-2018-6122.

An anonymous researcher reported that chaining the two flaws could result in the sandbox escape and could allow a remote attacker to take control of target systems.

Chrome addressed the CVE-2018-6120 heap buffer overflow in PDFium reported by Zhou Aiting of Qihoo 360 Vulcan Team that received a $5,000 reward.

In April, Google issued security patches to address another Critical flaw in Chrome, the flaw was fixed in with the 66.0.3359.137 version.

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Pierluigi Paganini

(Security Affairs – Chrome 66, Google)

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