AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:U/RC:C
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A vulnerability in the firewall modules of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to cause certain internal processes to crash.
The vulnerability is due to improper implementation of the firewall rule to limit incoming packets. An attacker could exploit this vulnerability by flooding the affected service with crafted packets. An exploit could allow the attacker to render some processes nonoperational, resulting in a denial of service (DoS) condition.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Customers are advised to consult Cisco bug ID CSCui51521 for a complete list of affected product versions.
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Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
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Software updates are not available.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Version Description Section Status Date 1.0 Initial Release NA Final 2013-Oct-23
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