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 HTTP index format out of bounds read attempt

Rule Explanation

This event is generated when an out of bounds read attempt is detected in Mozilla Firefox. Impact: Attempted Administrator Privilege Gain Details: Ease of Attack:

What To Look For

This event is triggered by a buffer overflow, vulnerable in Mozilla Firefox while parsing "application/http-index-format" formatted content when the header contains improperly formatted data.

Known Usage

No public information

False Positives

No known false positives


Cisco Talos Intelligence Group

Rule Groups

No rule groups



Rule Vulnerability

No information provided

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.


MITRE ATT&CK Framework

Tactic: Execution

Technique: Exploitation for Client Execution

For reference, see the MITRE ATT&CK vulnerability types here: