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300-730 · Question #109

Which clientless SSLVPN supported feature works when the http-only-cookie command is enabled?

The correct answer is D. Java plug-ins. The http-only-cookie command marks ASA session cookies with the HttpOnly attribute to prevent JavaScript from reading them; Java plug-ins use a browser-level HTTP mechanism that does not depend on JavaScript cookie access and continue to function.

Remote Access VPN

Question

Which clientless SSLVPN supported feature works when the http-only-cookie command is enabled?

Options

  • ACitrix load balancer
  • Bport-reflector
  • CJava rewriter
  • DJava plug-ins
  • Escript browser

How the community answered

(44 responses)
  • B
    5% (2)
  • C
    2% (1)
  • D
    91% (40)
  • E
    2% (1)

Why each option

The http-only-cookie command marks ASA session cookies with the HttpOnly attribute to prevent JavaScript from reading them; Java plug-ins use a browser-level HTTP mechanism that does not depend on JavaScript cookie access and continue to function.

ACitrix load balancer

Citrix load balancer integration depends on cookie inspection and manipulation techniques that are blocked when cookies carry the HttpOnly flag, preventing JavaScript from reading or modifying session state.

Bport-reflector

Port-reflector functionality requires JavaScript access to session cookies to manage port-forwarding state, which is broken when http-only-cookie is enabled.

CJava rewriter

The Java rewriter dynamically rewrites Java applet references in web pages using JavaScript-based session tracking that cannot function when session cookies are marked HttpOnly.

DJava plug-insCorrect

Java plug-ins in clientless SSLVPN communicate through a Java applet that interacts with the browser's HTTP stack directly, bypassing the JavaScript layer restricted by the HttpOnly flag. Because the session cookie remains accessible to HTTP requests made by the Java applet, Java plug-ins operate normally when http-only-cookie is enabled. This makes Java plug-ins uniquely compatible with this security setting among the listed features.

Escript browser

The script browser relies on JavaScript to handle session cookies for navigation and state management, which is incompatible with HttpOnly-flagged cookies.

Concept tested: Clientless SSLVPN http-only-cookie command compatibility with Java plug-ins

Source: https://www.cisco.com/c/en/us/td/docs/security/asa/asa96/configuration/vpn/asa-96-vpn-config/webvpn-configure-gateway.html

Topics

#clientless SSL VPN#http-only-cookie#Java plugins#ASA feature

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