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FFOX-00-000006 Firefox must be configured to not automatically execute or download MIME types that are not authorized for auto-download.

DISA STIG library V6R9
All changes in this version
first version loaded CAT II

Maps to SI-3 via CCI-001242

Title

Firefox must be configured to not automatically execute or download MIME types that are not authorized for auto-download.

Control

Type "about:preferences" in the browser address bar. Type "Applications" in the Find bar in the upper-right corner. Determine if any of the following file extensions are listed: HTA, JSE, JS, MOCHA, SHS, VBE, VBS, SCT, WSC, FDF, XFDF, LSL, LSO, LSS, IQY, RQY, DOS, BAT, PS, EPS, WCH, WCM, WB1, WB3, WCH, WCM, AD. If the entry exists and the "Action" is "Save File" or "Always Ask", this is not a finding. If an extension exists and the entry in the Action column is associated with an application that does/can execute the code, this is a finding.

Discussion

Some files can be downloaded or execute without user interaction. This setting ensures these files are not downloaded and executed.

Related controls

CCI-001242

Fix

Remove any unauthorized extensions from the auto-download list.