Firefox < 0.9.3 Null Character MIME Type Spoofing Arbitrary Code Execution

high Nessus Plugin ID 14197


The remote Windows host contains a web browser that has a code execution vulnerability.


The installed version of Firefox is earlier than 0.9.3. Such versions may allow arbitrary code execution.

The security vulnerability is due to the fact that Firefox stores cached HTML documents with a known file name, and to the fact that it's possible to force Firefox to open cached files as HTML documents by appending a NULL byte after the file name.

A remote attacker may combine these two flaws to execute arbitrary code on the remote host.


Upgrade to Firefox 0.9.3 or later.

Plugin Details

Severity: High

ID: 14197

File Name: mozilla_firefox_cache_file.nasl

Version: 1.21

Type: local

Agent: windows

Family: Windows

Published: 8/3/2004

Updated: 7/16/2018

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information


Risk Factor: Medium

Score: 4.8


Risk Factor: High

Base Score: 9.3

Temporal Score: 7.3

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:POC/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Required KB Items: Mozilla/Firefox/Version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/4/2004

Vulnerability Publication Date: 8/3/2004

Reference Information

CVE: CVE-2004-0760

BID: 10709