What’s Vulnerable › Vulnerabilities

CVE-2014-4172

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-24 · updated 2026-06-17
• Weakness: CWE-74

Description

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.

Affected products

• Apereo .Net Cas Client: before 1.0.2 — fixed in 1.0.2
• Apereo Java Cas Client: before 3.3.2 — fixed in 3.3.2
• apereo phpCAS: before 1.3.3 — fixed in 1.3.3
• Debian Linux: 7.0
• Fedoraproject Fedora: 20

How to fix

Upgrade to a fixed version: Apereo .Net Cas Client 1.0.2; Apereo Java Cas Client 3.3.2; apereo phpCAS 1.3.3. Check the vendor advisory for mitigations.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2014-August/137182.html
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759718
• https://bugzilla.redhat.com/show_bug.cgi?id=1131350
• https://exchange.xforce.ibmcloud.com/vulnerabilities/95673
• https://github.com/Jasig/dotnet-cas-client/commit/f0e030014fb7a39e5f38469f43199dc590fd0e8d
• https://github.com/Jasig/java-cas-client/commit/ae37092100c8eaec610dab6d83e5e05a8ee58814
• https://github.com/Jasig/phpCAS/blob/master/docs/ChangeLog
• https://github.com/Jasig/phpCAS/pull/125
• https://issues.jasig.org/browse/CASC-228
• https://www.debian.org/security/2014/dsa-3017.en.html
• https://www.mail-archive.com/cas-user%40lists.jasig.org/msg17338.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-August/137182.html

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