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 webaudio module use after free attempt

Rule Explanation

This rule looks for crafted JavaScript that, when executed, will trigger a use after free vulnerability in Google Chrome's webaudio module.

What To Look For

This rule looks for attempts to exploit a use after free vulnerability in Google Chrome.

Known Usage

No public information

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

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

CVE-2019-13720
Use after free in WebAudio in Google Chrome prior to 78.0.3904.87 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Details
SeverityMEDIUM Base Score6.8
Impact Score6.4 Exploit Score8.6
Confidentiality ImpactPARTIAL Integrity ImpactPARTIAL
Availability ImpactPARTIAL Access VectorNETWORK
AuthenticationNONE Ease of AccessMEDIUM