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 Cisco Nexus 1000V could allow an unauthenticated, remote attacker to obtain control over a Virtual Ethernet Module (VEM) and associated port groups.
The vulnerability is due to insufficient authentication between a VEM and a Virtual Supervisor Module (VSM). An attacker could exploit this vulnerability by using spoofed STUN protocol packets, or setting up a rogue ESXi instance to gain control over a VEM.
Cisco would like to thank Felix 'FX' Lindner, Recurity Labs GmbH, for reporting this issue to us.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, an attacker may require access to a trusted, internal network in which a targeted device may reside. This access requirement could limit the likelihood of a successful exploit.
Customers are advised to review the bug reports in the "Vendor Announcements" section for a current list of affected versions.
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Cisco has released a security notice for bug ID CSCud14832 at the following link: CVE-2013-1211
Vulnerable Products
At the time this alert was first published, Cisco NX-OS Software for Nexus 1000 Series 4.2(1)SV1(5.1) and prior is vulnerable. Later releases of Cisco NX-OS Software for Nexus 1000 Series may also be affected.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-May-29
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