Google addresses critical security vulnerabilities in Chrome 66
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2018-6120 | An integer overflow that could lead to an attacker-controlled heap out-of-bounds write in PDFium in Google Chrome prior to 66.0.3359.170 allowed a remote attack An integer overflow that could lead to an attacker-controlled heap out-of-bounds write in PDFium in Google Chrome prior to 66.0.3359.170 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. NVD description · AI analysis pending | 8.8 | 2% |
| — | ||
| CVE-2018-6121 | Insufficient validation of input in Blink in Google Chrome prior to 66.0.3359.170 allowed a remote attacker to perform privilege escalation via a crafted HTML p Insufficient validation of input in Blink in Google Chrome prior to 66.0.3359.170 allowed a remote attacker to perform privilege escalation via a crafted HTML page. NVD description · AI analysis pending | 8.8 | <1% |
| — | ||
| CVE-2018-6122 | Type confusion in WebAssembly in Google Chrome prior to 66.0.3359.139 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. Type confusion in WebAssembly in Google Chrome prior to 66.0.3359.139 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. NVD description · AI analysis pending | 8.8 | <1% |
| — |
Full article252 words · extracted from securityaffairs.com · click to collapse

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″

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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(Security Affairs – Chrome 66, Google)
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Text extracted automatically; images, tables and formatting may be missing. Original: https://securityaffairs.com/72400/security/chrome-66-flaws.html