June 7, 2023

Chrome 85 was released in the stable version with 20 security fixes inside, including patches for 14 vulnerabilities disclosed by external researchers.

The first of them, CVE-2020-6558, an insufficient policy enforcement in iOS.The second, CVE-2020-6559, a use-after-free in the presentation API.

Seven medium severity bugs reported by external researchers were patched in this Chrome release, including an inappropriate implementation in Content, four insufficient policy enforcements (in autofill, Blink, intent handling, and media), and two incorrect security UI issues (in permissions and Omnibox).

The five low risk flaws reported externally include insufficient validation of untrusted input in command line handling, insufficient policy enforcement in intent handling, integer overflow in WebUSB, side-channel information leakage in WebRTC, and incorrect security UI in Omnibox.

Although Google doesn’t mention it, earlier this week, Cisco published information on another high severity flaw that was addressed in Chrome 85, namely CVE-2020-6492 (CVSS score of 8.3).

The issue, described as use-after-free read, exists when “a WebGL component fails to properly handle objects in memory,” Cisco explains. An attacker able to successfully exploit the vulnerability could execute arbitrary code in the context of the browser process.

Cisco’s security researchers identified the bug in Chrome 81.0.4044.138 (Stable), Chrome 84.0.4136.5 (Dev), and Chrome 84.0.4143.7 (Canary), and say that Chrome 85 addresses the issue.

“This vulnerability specifically exists in ANGLE, a compatibility layer between OpenGL and Direct3D that Chrome uses on Windows systems. An adversary could manipulate the memory layout of the browser in a way that they could gain control of the use-after-free exploit, which could ultimately lead to arbitrary code execution,” .

The latest Chrome iteration is rolling out to Windows, Mac and Linux users as version 85.0.4183.83.

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