Rule Category

BROWSER-CHROME -- Snort has detected suspicious traffic known to exploit vulnerabilities present in the Chrome browser. These rules are separate from the "browser-webkit" category; while it uses the Webkit rendering engine, there's a lot of other features to create a secondary Chrome category.

Alert Message

BROWSER-CHROME Google Chrome Blink use-after-free attempt

Rule Explanation

Chrome browser prior to 77.0.3865.90 is vulnerable to a use-after-free in Blink. Blink is the rendering engine for the Chrome browser and an attacker can gain code execution by triggering this vulnerability remotely.

What To Look For

This rule alerts when attempt is made to trigger a use-after-free condition in Chrome browser's Blink framework.

Known Usage

Public information/Proof of Concept available

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Execution

Technique: User Execution

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org

Additional Links

Rule Vulnerability

Use After Free

Use After Free (UAF) attacks target computer memory flaws to corrupt the memory execute code. The name refers to attempts to use memory after it has been freed, which can cause a program to crash under normal circumstances, or result in remote code execution in a successful attack.

CVE Additional Information