Rule Category

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.).

Alert Message

BROWSER-FIREFOX Mozilla Firefox default content process DACL sandbox escape attempt

Rule Explanation

This rule looks for a crafted Windows executable that will exploit a Firefox sandbox escape vulnerability.

What To Look For

This rule looks for an attempt to exploit a Mozilla Firefox sandbox escape vulnerability.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

No rule groups

CVE

Additional Links

Rule Vulnerability

N/A

Not Applicable

CVE Additional Information

CVE-2020-12388
The Firefox content processes did not sufficiently lockdown access control which could result in a sandbox escape. *Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox ESR < 68.8 and Firefox < 76.
Details
Severity Base Score10.0
Impact Score6.0 Exploit Score3.9
Confidentiality ImpactHIGH Integrity ImpactHIGH
Availability ImpactHIGH Attack VectorNETWORK
ScopeCHANGED User InteractionNONE
Authentication Ease of AccessLOW
Privileges RequiredNONE