Cisco Security Advisory
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AV:N/AC:L/Au:S/C:N/I:N/A:C/E:U/RL:OF/RC:C
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A vulnerability in the WebVPN Common Internet File System (CIFS) access function of Cisco Adaptive Security Appliance (ASA) could allow an authenticated, remote attacker to trigger a reload of the affected device.
The vulnerability is due to missing bounds checks on the response received from the CIFS server when enumerating available shares. An attacker could exploit this vulnerability by attempting to attain the list of shares from CIFS servers that offer a large number of shares. Controlling a CIFS server may also aid the attacker. An exploit could allow the attacker to trigger a reload of the Cisco ASA, resulting in a denial of service (DoS) condition.
Cisco has confirmed the vulnerability in a security notice and released software updates.
To exploit this vulnerability, an attacker must authenticate to a targeted device. This access requirement may reduce the possibility of a successful exploit.
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Customers are advised to consult Cisco bug ID CSCuj83344 for a complete list of affected product versions.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to allow only privileged users to access administration or management systems.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com for assistance.
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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-Jul-14
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