---
title: "CVE-2014-4172\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2014-4172?format=md
keywords: index, follow
---

# CVE-2014-4172

Publication date 24 January 2020

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2014-4172?format=md#impact-score)

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| php-cas | 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Ignored end of life |
| 15.04 vivid | Ignored end of life |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not in release |
| 10.04 LTS lucid | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2014-4172?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| php-cas | * Upstream:   [83168b3](https://github.com/apereo/phpCAS/commit/83168b398e10defc384b740e104950a3fef83e51) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4172)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2014-4172)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2014-4172)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2014-4172)

### Other references

* <https://github.com/Jasig/phpCAS/pull/125>
* <https://www.cve.org/CVERecord?id=CVE-2014-4172>