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Vulnerability of Jasig CAS Server: bypassing LDAP authentication via Wildcard

Synthesis of the vulnerability 

An attacker can use the wildcard character on Jasig CAS Server, in order to ease a brute force attack on the LDAP directory.
Vulnerable products: CAS Server.
Severity of this weakness: 2/4.
Creation date: 21/01/2015.
Références of this bulletin: CVE-2015-1169, VIGILANCE-VUL-16020.

Description of the vulnerability 

The Jasig CAS Server product uses a LDAP directory to store login/password of users.

However, if user "laurent" exists, an attacker can only enter "la*" with his valid password, to authenticate on the account.

An attacker can therefore use the wildcard character on Jasig CAS Server, in order to ease a brute force attack on the LDAP directory.
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This vulnerability bulletin impacts software or systems such as CAS Server.

Our Vigil@nce team determined that the severity of this security note is medium.

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 cybersecurity note.

Solutions for this threat 

Jasig CAS Server: version 3.5.3.
The version 3.5.3 is fixed:
  https://www.apereo.org/cas
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