medium
6.7
CWE
347
Advisory Published
Updated

CVE-2019-1808: Cisco MDS 9700 Series Multilayer Directors and Nexus 7000/7700 Series Switches Software Patch Signature Verification Vulnerability

First published: Wed May 15 2019(Updated: )

A vulnerability in the Image Signature Verification feature of Cisco NX-OS Software could allow an authenticated, local attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by loading an unsigned software patch on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nx-os>=7.3<8.1\(1a\)
Cisco Nx-os>=8.2<8.3\(1\)
Cisco Mds 9706
Cisco Mds 9710
Cisco Mds 9718
Cisco Nx-os>=7.2<7.3\(3\)d1\(1\)
Cisco Nx-os>=8.0<8.2\(3\)
Cisco 7000 10-slot
Cisco 7000 18-slot
Cisco 7000 4-slot
Cisco 7000 9-slot
Cisco 7700 10-slot
Cisco 7700 18-slot
Cisco 7700 2-slot
Cisco 7700 6-slot
Cisco N77-f312ck-26
Cisco N77-f324fq-25
Cisco N77-f348xp-23
Cisco N77-f430cq-36
Cisco N77-m312cq-26l
Cisco N77-m324fq-25l
Cisco N77-m348xp-23l
Cisco N7k-f248xp-25e
Cisco N7k-f306ck-25
Cisco N7k-f312fq-25
Cisco N7k-m202cf-22l
Cisco N7k-m206fq-23l
Cisco N7k-m224xp-23l
Cisco N7k-m324fq-25l
Cisco N7k-m348xp-25l
Cisco Nexus 7000 Supervisor 1
Cisco Nexus 7000 Supervisor 2
Cisco Nexus 7000 Supervisor 2e
Cisco Nexus 7700 Supervisor 2e
Cisco Nexus 7700 Supervisor 3e

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Reference Links

Frequently Asked Questions

  • What is CVE-2019-1808?

    CVE-2019-1808 is a vulnerability in the Image Signature Verification feature of Cisco NX-OS Software that could allow an authenticated, local attacker to install a malicious software patch on an affected device.

  • How does CVE-2019-1808 affect Cisco NX-OS Software?

    CVE-2019-1808 affects Cisco NX-OS Software versions 7.3 to 8.1(1a) and versions 8.2 to 8.3(1).

  • What is the severity of CVE-2019-1808?

    CVE-2019-1808 has a severity rating of 4.4 out of 10, which is considered medium severity.

  • Are Cisco MDS devices affected by CVE-2019-1808?

    No, Cisco MDS devices are not affected by CVE-2019-1808.

  • How can I fix CVE-2019-1808?

    To fix CVE-2019-1808, upgrade to a fixed software release based on the Cisco NX-OS Software version running on the device.

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