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Vulnerability of Cisco Secure Access Control System: open redirect

Synthesis of the vulnerability 

An attacker can deceive the user of Cisco Secure Access Control System, in order to redirect him to a malicious site.
Vulnerable systems: Secure ACS.
Severity of this threat: 1/4.
Creation date: 16/02/2017.
Références of this weakness: CERTFR-2017-AVI-052, cisco-sa-20170215-acs2, CVE-2017-3840, VIGILANCE-VUL-21866.

Description of the vulnerability 

The Cisco Secure Access Control System product offers a web service.

However, the web service accepts to redirect the victim with no warning, to an external site indicated by the attacker.

An attacker can therefore deceive the user of Cisco Secure Access Control System, in order to redirect him to a malicious site.
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This threat alert impacts software or systems such as Secure ACS.

Our Vigil@nce team determined that the severity of this computer vulnerability bulletin is low.

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

An attacker with a expert ability can exploit this weakness note.

Solutions for this threat 

Cisco Secure Access Control System: solution CSCvc04849.
The solution is described on the Cisco site:
  https://tools.cisco.com/bugsearch/bug/CSCvc04849
  https://tools.cisco.com/quickview/bug/CSCvc04849
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