Cisco Security Advisory
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AV:N/AC:H/Au:N/C:N/I:N/A:C/E:U/RL:OF/RC:C
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Cisco NX-OS contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted device.
The vulnerability is due to improper processing of certain packets by the affected devices. An unauthenticated, remote attacker could exploit this vulnerability by sending malicious packets to the device. Processing the packets could cause a DoS condition on a targeted device.
Cisco has confirmed this vulnerability and has released updated software.
A successful exploit could allow an attacker to cause the vulnerable device to reload, potentially preventing authorized users from accessing network resources served by the targeted device.
In typical network configuration, such devices are placed behind a firewall. To achieve the objective, an attacker would need access to an internal network to send crafted packets to a vulnerable device. This access requirement could limit the possibility of a successful exploit.
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Cisco has issued release notes for Cisco bug ID CSCtn93151 at the following link: Cisco MDS NX-OS Release 5.2(2)
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Administrators are advised to apply the appropriate updates.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.
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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 2012-Aug-10
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