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CVE-2014-4172 is an improper URL-encoding vulnerability in the CAS protocol back-channel ticket-validation process in Jasig Java CAS Client before 3.3.2, .NET CAS Client before 1.0.2, and phpCAS before 1.3.3. The affected validation logic fails to safely encode attacker-controlled service and proxy-granting-ticket callback parameters when constructing validation requests. A remote attacker can inject URL parameters, including arbitrary HTML or web script in affected flows, and can cause a ticket issued for one CAS service to be validated against another service, bypassing the CAS service-binding security constraint.
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CAS client security-constraint bypass through URL parameter injection.
An improper URL-encoding flaw in back-channel ticket validation in the JA-SIG CAS client. A remote attacker could inject URL parameters to bypass security constraints.
An important URL-parameter injection flaw in CAS back-channel ticket validation. Remote unauthenticated attackers can inject arbitrary HTML or web script through the service or pgtUrl parameters, potentially bypassing security constraints.
An improper URL-encoding / URL-parameter-injection vulnerability in CAS back-channel ticket validation. It can allow a valid ticket issued for one service to be used against another service, enabling illicit authentication proxying, unauthorized data disclosure, or privilege escalation.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.