A vulnerability was found in Jasig Java CAS Client, .NET CAS Client and phpCAS (Programming Language Software) (the affected version is unknown). It has been classified as critical. This affects an unknown code of the file validation/AbstractUrlBasedTicketValidator.java of the component Ticket Validation Handler. The manipulation of the argument URL with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A URL parameter injection vulnerability was found in the back-channel ticket validation step of the CAS protocol in Jasig Java CAS Client before 3.3.2, .NET CAS Client before 1.0.2, and phpCAS before 1.3.3 that allow remote attackers to inject arbitrary web script or HTML via the (1) service parameter to validation/AbstractUrlBasedTicketValidator.java or (2) pgtUrl parameter to validation/Cas20ServiceTicketValidator.java.

The weakness was shared 04/21/2023. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2014-4172 since 06/17/2014. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 77510 (Debian DSA-3017-1 : php-cas - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

Upgrading eliminates this vulnerability. Applying the patch f0e030014fb7a39e5f38469f43199dc590fd0e8d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (95673) and Tenable (77510). The entries VDB-272300, VDB-272544, VDB-272545 and VDB-272605 are related to this item.

Productinfo

Type

• Programming Language Software

Vendor

• Jasig

Name

• .NET CAS Client
• Java CAS Client
• phpCAS

License

• open-source

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