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Chrome 66 Distrusts Older Symantec Certificates

Released in the stable channel on Tuesday, Chrome 66 removes trusts in website certificates that Symantec issued before June 1, 2016, while also bringing a trial of Site Isolation, and patching 62 vulnerabilities.

Released in the stable channel on Tuesday, Chrome 66 removes trusts in website certificates that Symantec issued before June 1, 2016, while also bringing a trial of Site Isolation, and patching 62 vulnerabilities.

The removal of trust in older Symantec certificates was triggered by the improper issuance of numerous digital certificates over the course of several years. Last year, Google said it wanted all website certificates issued by the Certificate Authority to be replaced until Chrome 70 arrives this fall. Mozilla too will completely remove trust in root certificates issued by Symantec.

Symantec last year sold its Certificate Authority business to DigiCert, which revealed last month that over 99% of the top 1 million websites already replaced the Symantec certificates. DigiCert has been issuing trusted certificates for the Symantec, Thawte, GeoTrust and RapidSSL brands since Dec. 1, 2017.

“Chrome 66 will not trust website certificates issued by Symantec’s legacy PKI before June 1st 2016, continuing the phased distrust outlined in our previous announcements,” Google now says.

The new browser release also includes a small percentage trial of Site Isolation, in preparation of the feature’s broader launch. Announced in Chrome 63, Site Isolation is meant to improve the application’s overall security and to mitigate the security risks posed by the Spectre vulnerability.

Additionally, the new Chrome update includes 62 security fixes, including two Use after free in Disk Cache, rated Critical severity. Tracked as CVE-2018-6085 and CVE-2018-6086, both were reported by Ned Williamson.

More than half of the vulnerabilities were reported by external researchers, namely the pair of Critical bugs, 6 vulnerabilities rated High severity, 16 rated Medium risk, and 10 considered Low severity.

The High risk flaws were: Use after free in WebAssembly (CVE-2018-6087), Use after free in PDFium (CVE-2018-6088), Same origin policy bypass in Service Worker (CVE-2018-6089), Heap buffer overflow in Skia (CVE-2018-6090), Incorrect handling of plug-ins by Service Worker (CVE-2018-6091), and Integer overflow in WebAssembly (CVE-2018-6092).

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The Medium severity issues addressed in Chrome 66 affected Service Worker, Oilpan, file upload, Omnibox, DevTools, Permissions, and V8. Google also addressed two Fullscreen UI spoof vulnerabilities.

The Low risk bugs impacted FileAPI, file://, DevTools, WebAssembly, and Navigation. The new browser release also addresses a CSP bypass, a SmartScreen bypass in downloads, confusing autofill settings, and an incorrect use of Distributed Objects in Google Software Updater on MacOS.

The updated application is available for download as Chrome 66.0.3359.117, for Windows, Mac and Linux. It should be delivered to existing users within the next several days or weeks.

Related: Google Bans Crypto-Mining Chrome Extensions

Related: Chrome 65 Patches 45 Vulnerabilities

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

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