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Cisco Nexus 1000V Access Control List Bypass Vulnerability

Cisco-SA-20140506-CVE-2014-0685 · Medium · Published · Updated

A vulnerability in Cisco Nexus 1000V switches could allow an unauthenticated, remote attacker to bypass deny statements in access control lists (ACLs) with certain types of Internet Group Management Protocol version 2 (IGMPv2) or IGMP version 3 (IGMPv3) traffic. IGMP version 1 (IGMPv1) is not affected. The vulnerability is due to a lack of IGMPv2 and IGMPv3 support in ACLs. An attacker could exploit this vulnerability by sending certain IGMPv2 or IGMPv3 requests to an affected switch. Cisco has confirmed the vulnerability in a security notice and released software updates. To exploit this vulnerability, an attacker may need access to trusted, internal networks to send IGMPv2 or IGMPv3 requests to a targeted device. This access requirement may reduce the possibility 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.

Cisco advisory · CSAF JSON

Workarounds

Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to monitor affected systems.

CVEsCVE-2014-0685
Cisco Bug IDsCSCug61691
CVSS ScoreBase 5.0
Base 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N/E:F/RL:OF/RC:C
Product Names From Source
Cisco Nexus 1000V InterCloud for VMware

Related Products

Product CVE Evidence
Cisco Nexus 1000V Switch CVE-2014-0685 Cisco OpenVuln
Cisco Nexus 1000V InterCloud for VMware CVE-2014-0685 Cisco OpenVuln