Cisco Security Advisory
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AV:N/AC:M/Au:N/C:N/I:P/A:N/E:F/RL:U/RC:C
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A vulnerability in RADIUS Change of Authorization (CoA) messages of the Identity Firewall (IDFW) feature of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to modify the contents of the IDFW user cache.
The vulnerability is due to insufficient validation of received RADIUS CoA messages. An attacker could exploit this vulnerability by replaying crafted RAIDUS CoA messages. An exploit could allow the attacker to modify the IDFW user cache of the ASA.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker would likely require access to trusted, internal networks to replay crafted RADIUS messages. This access requirement reduces the likelihood of a successful exploit.
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 CSCuj45332 for the most complete list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco ASA Software releases 9.1(.3) and prior were vulnerable. Later releases of Cisco ASA Software may also be vulnerable.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to contact the vendor regarding future updates and releases.
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 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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Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2014-Jan-08
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