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 V8 Turbofan Array pop type confusion attempt

Rule Explanation

This rule looks for attempts to exploit an array type confusion vulnerability in Google Chrome V8. This exploit uses improper JIT optimizations in the Turbofan engine to confuse one type of array with another. This leads to out of bounds write access for specific JavaScript objects on the heap, leading to arbitrary code execution.

What To Look For

This alert occurs when attackers attempt to exploit CVE-2020-6418, a type confusion vulnerability in Google Chrome V8.

Known Usage

Attacks/Scans seen in the wild

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic: Initial Access

Technique: Drive-by Compromise

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

CVE

Additional Links

Rule Vulnerability

CVE Additional Information

CVE-2020-6418
Type confusion in V8 in Google Chrome prior to 80.0.3987.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Details
SeverityMEDIUM Base Score4.3
Impact Score2.9 Exploit Score8.6
Confidentiality ImpactNONE Integrity ImpactNONE
Availability ImpactPARTIAL Access VectorNETWORK
AuthenticationNONE Ease of AccessMEDIUM