BROWSER-FIREFOX -- Snort has detected traffic known to exploit vulnerabilities present in the Firefox browser, or products that have the "Gecko" engine (Thunderbird email client, etc.).
BROWSER-FIREFOX Mozilla Firefox ReadableStreamCloseInternal out-of-bounds access attempt
What To Look For
This rule alerts when a specifically formatted web page designed to exploit CVE-2020-6806 is detected. CVE-2020-6806 is a memory corruption bug in Mozilla Firefox.
No public information
No known false positives
Cisco Talos Intelligence Group