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Vulnerability of Jasig CAS Server: privilege escalation via statistics

Synthesis of the vulnerability 

An attacker can use statistics pages of Jasig CAS Server, in order to escalate his privileges.
Impacted products: CAS Server.
Severity of this bulletin: 3/4.
Creation date: 30/09/2016.
Revision date: 25/10/2016.
Références of this threat: VIGILANCE-VUL-20739.

Description of the vulnerability 

The Jasig CAS Server product offers a web service.

However, the following pages are public:
 - /statistics/ping
 - /statistics/threads
 - /statistics/metrics
 - /statistics/healthcheck
 - /statistics/ssosessions

An attacker can therefore use statistics pages of Jasig CAS Server, in order to escalate his privileges.
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This computer weakness announce impacts software or systems such as CAS Server.

Our Vigil@nce team determined that the severity of this security alert is important.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this vulnerability.

Solutions for this threat 

Jasig CAS Server: version 4.2.6.
The version 4.2.6 is fixed:
  https://github.com/apereo/cas/releases
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