Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:P/A:N/E:F/RL:U/RC:C
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A vulnerability in the phone proxy feature of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to temporarily insert an invalid entry in the phone proxy connection database.
The vulnerability is due to the acceptance of an untrusted certificate. An attacker could exploit this vulnerability by submitting a crafted certificate to the phone proxy process. An exploit could allow the attacker to insert an invalid entry into the phone proxy connection database.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks to submit a crafted certificate to the phone proxy process on an affected device. This access requirement limits 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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Cisco released a security notice at the following link: CVE-2013-6682
Customers are advised to consult Cisco bug ID CSCui33299 for the most complete list of affected product versions.Vulnerable Products
At the time this alert was first published, Cisco ASA Software Release 9.0.3.6 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 2013-Nov-11
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