ChromeHeap | CVE-2022-4135

Overview

Google recently released a patch for a new zero-day vulnerability, tracked as CVE-2022-4135, found in the Chromium open-source web browser project, which provides the codebase for many popular browsers. This vulnerability is reported to be of critical severity at a CVSS 3.x score of 9.6 and exists in the GPU component causing a heap buffer overflow. Reportedly, this CVE affects older versions of Google Chrome and Microsoft Edge, and patches have been released for both in response to this zero-day. Google has disclosed that the vulnerability is currently known to be actively exploited, making this disclosure a concern for any organization or individual that leverages the Chrome browser across Android, Windows, Mac, or Linux.

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Lookout Analysis

The most likely way for an attacker to exploit this vulnerability would be to send a link leading to a malcrafted webpage to their target in hopes that the target still has a vulnerable version of Chrome on their device. A successful exploit may grant a threat actor access to Chrome's capabilities without needing to root the device. It can enable threat actors to crash a program or execute codes remotely.

Mobile device management (MDM) tools will not detect a successful exploitation. In the event of a successful exploit, the actor could have access to any capability that the browser has. Per NIST’s national vulnerability database, this can arm “a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page”