HTTP Security Header - HTTP Strict Transport Security (HSTS) Missing From HTTPS Server (RFC 6797)

• During the Pentest scanning of PAN-OS 10.2.x, HTTP Security header is reported as missing.
• This can be checked with the curl command.

test-host-> curl -I -k https://w.x.y.z
HTTP/1.1 302 Found
Date: Fri, 17 Mar 2023 13:53:28 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Set-Cookie: PHPSESSID=d90l0umcr2s5b74jkvc12l0orr; path=/; secure; HttpOnly
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Location: /php/login.php?
Allow: GET, HEAD, POST, PUT, DELETE, OPTIONS

• The above header output does not show "Strict-Transport-Security" but it also redirects the page to /php/login.php with HTTP 302 Found.
• While checking the headers in the redirected page /php/loginphp, it displays the security header  "Strict-Transport-Security: max-age=31536000" as shown below.

test-host-> curl -I -k https://w.x.y.z/php/login.php
HTTP/1.1 200 OK
Date: Fri, 17 Mar 2023 13:53:54 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Cache-Control: no-store, no-cache, must-revalidate
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self'
Strict-Transport-Security: max-age=31536000 <<<<-----
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Pragma: no-cache
Set-Cookie: PHPSESSID=6jp2219a8dfev8djdulc4eqats; path=/; secure; HttpOnly; SameSite=strict
Set-Cookie: PHPSESSID=6jp2219a8dfev8djdulc4eqats; path=/; secure; HttpOnly; SameSite=strict
Allow: GET, HEAD, POST, PUT, DELETE, OPTIONS

• Palo Alto Firewalls
• PanOS 10.2.x
• Management Interface
• HTTPS

Strict-Transport-Security: max-age=31536000

1. The root URL does 302 redirects to the login page which has the "Strict-Transport-Security" header.
2. There is no vulnerability or risk since the redirected page has the "Strict-Transport-Security".
3. The issue has been addressed in the PAN-OS 10.2.4 /11.0.0 release and later.