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Vulnerability of Cisco Secure ACS: disclosure of passwords under Windows

Synthesis of the vulnerability 

An administrator can obtain the key used to cypher passwords of Cisco Secure ACS.
Vulnerable products: Secure ACS.
Severity of this weakness: 1/4.
Creation date: 09/05/2006.
Références of this bulletin: BID-16743, CSCsb67457, CVE-2006-0561, SYMSA-2006-003, VIGILANCE-VUL-5820.

Description of the vulnerability 

Under Windows, when Active Directory or LDAP is not used, Cisco Secure ACS 3.x stores key to decrypt passwords in registry:
  HKEY_LOCAL_MACHINE\SOFTWARE\Cisco\CiscoAAAv3.3\CSAdmin\Administrators

However, access to this key is allowed to all members of local and remote administrative groups.

All administrators can therefore access to passwords managed by Cisco Secure ACS.
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This cybersecurity note impacts software or systems such as Secure ACS.

Our Vigil@nce team determined that the severity of this computer weakness announce is low.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this cybersecurity vulnerability.

Solutions for this threat 

Cisco Secure ACS: workaround.
A workaround is to limit access to following key to allowed users only:
  HKEY_LOCAL_MACHINE\SOFTWARE\Cisco\CiscoAAAv3.3\CSAdmin\Administrators
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