While assessing an online banking site, you note that the application tracks users with a PHPSESSID value placed in the URL (…/home.php?PHPSESSID=9fa1d). To capture an authenticated session, you plan to email a link that already contains a session ID you created, hoping the victim will log in without the token changing. Which application-level session hijacking technique does this plan depend on?
The described attack assumes the server will accept a session identifier that the attacker has set in advance. By forcing the victim to authenticate using this pre-defined ID-embedded in the URL-the attacker can later reuse the same token to take over the victim's session. This is the essence of session fixation. Cross-site request forgery abuses an existing authenticated session to trigger unwanted actions, not to steal the session ID itself. Session prediction involves guessing valid, server-generated tokens rather than fixing one. Clickjacking relies on UI redressing, not on manipulating session identifiers.
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What is session fixation and how does it work?
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What is session fixation?
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