Cisco Secure Access Control System TACACS+ Authentication Bypass

2012.11.08
Credit: Cisco
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

Cisco Secure Access Control System TACACS+ Authentication Bypass Vulnerability Advisory ID: cisco-sa-20121107-acs Revision 1.0 For Public Release 2012 November 7 16:00 UTC (GMT) - ---------------------------------------------------------------------- Summary ======= Cisco Secure Access Control System (ACS) contains a vulnerability that could allow an unauthenticated, remote attacker to bypass TACACS+ based authentication service offered by the affected product. The vulnerability is due to improper validation of the user-supplied password when TACACS+ is the authentication protocol and Cisco Secure ACS is configured with a Lightweight Directory Access Protocol (LDAP) external identity store. An attacker may exploit this vulnerability by sending a special sequence of characters when prompted for the user password. The attacker would need to know a valid username stored in the LDAP external identity store to exploit this vulnerability, and the exploitation is limited to impersonate only that user. An exploit could allow the attacker to successfully authenticate to any system using TACACS+ in combination with an affected Cisco Secure ACS. Cisco has released free software updates that address this vulnerability. There are no workarounds for this vulnerability. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20121107-acs

References:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20121107-acs


Vote for this issue:
50%
50%


 

Thanks for you vote!


 

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.


(*) - required fields.  
{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1
{{ x.comment }}

Copyright 2021, cxsecurity.com

 

Back to Top