critical
10
CWE
1188 310
Advisory Published
Updated

CVE-2019-1804: Cisco Nexus 9000 Series Fabric Switches Application Centric Infrastructure Mode Default SSH Key Vulnerability

First published: Wed May 01 2019(Updated: )

A vulnerability in the SSH key management for the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, remote attacker to connect to the affected system with the privileges of the root user. The vulnerability is due to the presence of a default SSH key pair that is present in all devices. An attacker could exploit this vulnerability by opening an SSH connection via IPv6 to a targeted device using the extracted key materials. An exploit could allow the attacker to access the system with the privileges of the root user. This vulnerability is only exploitable over IPv6; IPv4 is not vulnerable.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nexus 9332pq Firmware=14.0\(3d\)
Cisco Nexus 9332pq
Cisco Nexus 93180yc-ex Firmware=14.0\(3d\)
Cisco Nexus 93180yc-ex
Cisco Nexus 93128tx Firmware=14.0\(3d\)
Cisco Nexus 93128tx
Cisco Nexus 93120tx Firmware=14.0\(3d\)
Cisco Nexus 93120tx
Cisco Nexus 93108tc-ex Firmware=14.0\(3d\)
Cisco Nexus 93108tc-ex
Cisco Nexus 9516 Firmware=14.0\(3d\)
Cisco Nexus 9516
Cisco Nexus 9508 Firmware=14.0\(3d\)
Cisco Nexus 9508
Cisco Nexus 9504 Firmware=14.0\(3d\)
Cisco Nexus 9504
Cisco Nexus 9500 Firmware=14.0\(3d\)
Cisco Nexus 9500
Cisco Nexus 9396tx Firmware=14.0\(3d\)
Cisco Nexus 9396tx
Cisco Nexus 9396px Firmware=14.0\(3d\)
Cisco Nexus 9396px
Cisco Nexus 9372tx Firmware=14.0\(3d\)
Cisco Nexus 9372tx
Cisco Nexus 9372px Firmware=14.0\(3d\)
Cisco Nexus 9372px

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-1804?

    CVE-2019-1804 is a vulnerability in the SSH key management for the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software.

  • What is the severity of CVE-2019-1804?

    CVE-2019-1804 has a severity rating of 9.8 (critical).

  • How does CVE-2019-1804 affect Cisco Nexus 9332pq Firmware?

    Cisco Nexus 9332pq Firmware version 14.0(3d) is affected by CVE-2019-1804.

  • How can an attacker exploit CVE-2019-1804?

    An unauthenticated remote attacker can exploit CVE-2019-1804 to connect to the affected system with the privileges of the root user.

  • How can I fix CVE-2019-1804?

    To fix CVE-2019-1804, update the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software to a non-vulnerable version.

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