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
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
No rule groups
CVE-2020-6806By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.