Firefox must be configured to allow only TLS 1.2 or above.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-251546 | FFOX-00-000002 | SV-251546r961869_rule | CCI-001453 | high |
| Description | ||||
| 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. | ||||
| STIG | Date | |||
| Mozilla Firefox Security Technical Implementation Guide | 2025-02-11 | |||
Related Frameworks
3 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
AC-17(2)
1.00
- DISA · 6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.1.13
1.00
- DISA · 6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-001453
1.00
- DISA · 6 · disa_xccdf · related
Details
Check Text (C-251546r961869_chk)
Type "about:policies" in the browser window.
If "SSLVersionMin" is not displayed under Policy Name or the Policy Value is not "tls1.2" or "tls1.3", this is a finding.
Fix Text (F-54935r820744_fix)
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")