V-251581
CAT IIFirefox encrypted media extensions must be disabled.
- Ships Affected
- 1
- Total Findings
- 4
- Open
- 0
- Closed
- 4
Check Text
Type "about:policies" in the browser address bar.
If "EncryptedMediaExtensions" is not displayed under Policy Name or the Policy Value does not have "Enabled" set to "false" or the Policy Value does not have "Locked" set to "true", this is a finding.
Fix Text
Windows group policy:
1. Open the group policy editor tool with "gpedit.msc".
2. Navigate to Policy Path: Computer Configuration\Administrative Templates\Mozilla\Firefox\Encrypted Media Extensions
Policy Name: Enable Encrypted Media Extensions
Policy State: Disabled
Policy Name: Lock Encrypted Media Extensions
Policy State: Enabled
macOS "plist" file:
<key>EncryptedMediaExtensions</key>
<dict>
<key>Enabled</key>
<false/>
<key>Locked</key>
<true/>
Linux "policies.json" file:
Add the following in the policies section:
"EncryptedMediaExtensions": {
"Enabled": false,
"Locked": true
}
STIG Reference
- STIG
- Mozilla Firefox Security Technical Implementation Guide
- Version
- 6
- Release
- 7
- Rule ID
- SV-251581r960963_rule
All Occurrences
This vulnerability appears on 1 ship(s)
| Ship | Hull # | Source File | Status | Assigned To | Scan Date | Actions |
|---|---|---|---|---|---|---|
| USNS MONTFORD POINT | T-ESD-1 | MONT-SW-89134_Firefox_V6R6_20251217-201244.ckl | Unassigned | 2026-03-04T15:25:41.899130 | View in Context | |
| USNS MONTFORD POINT | T-ESD-1 | MONT-SW-89108_Firefox_V6R6_20251217-203042.ckl | Unassigned | 2026-03-04T15:25:15.868210 | View in Context | |
| USNS MONTFORD POINT | T-ESD-1 | _Reviewed/MONT-WS-92010/Checklist/MONT-WS-92010_Firefox_V6R6_20251023-141154.ckl | Unassigned | 2026-01-14T12:57:27.870047 | View in Context | |
| USNS MONTFORD POINT | T-ESD-1 | _Reviewed/MONT-WS-92040/Checklist/MONT-WS-92040_Firefox_V6R6_20251023-142444.ckl | Unassigned | 2026-01-14T12:57:25.596878 | View in Context |