Detections
Analytics

FFOX-00-000002 - Firefox must be configured to allow only TLS 1.2 or above.

Information

Use of versions prior to TLS 1.2 are not permitted. SSL 2.0 and SSL 3.0 contain a number of security flaws. These versions must be disabled in compliance with the Network Infrastructure and Secure Remote Computing STIGs.

Solution

Windows group policy:
1. Open the group policy editor tool with "gpedit.msc".
2. Navigate to Policy Path: Computer Configuration\Administrative Templates\Mozilla\Firefox\
Policy Name: Minimum SSL version enabled
Policy State: Enabled
Policy Value: TLS 1.2 (or TLS 1.3)

macOS "plist" file:
Add the following:
<key>SSLVersionMin</key>
<string>tls1.2</string> (or <string>tls1.3</string>)

Linux "policies.json" file:
Add the following in the policies section:
"SSLVersionMin": "tls1.2" or ("SSLVersionMin": "tls1.3")

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MOZ_Firefox_V6R8_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-17(2), CAT|I, CCI|CCI-001453, Rule-ID|SV-251546r1201983_rule, STIG-ID|FFOX-00-000002, Vuln-ID|V-251546

Plugin: Unix

Control ID: 2cb9fa377b4b8c79dc67c8445926754eb505265cb075c6e7adc13a727f126cb8