SB2020022017 - Improper Verification of Cryptographic Signature in Multiple Cisco UCS-Based Products

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Main Vulnerability Database SB2020022017

SB2020022017 - Improper Verification of Cryptographic Signature in Multiple Cisco UCS-Based Products

Published: February 20, 2020

Security Bulletin ID SB2020022017
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2019-1736)

The vulnerability allows a local user to load a compromised software image on an affected device.

The vulnerability exists within the firmware of the Cisco UCS C-Series Rack Servers due to improper validation of the server firmware upgrade images. An administrator with physical access can install a server firmware version that would allow the attacker to disable UEFI Secure Boot.

A successful exploit could allow the attacker to bypass the signature validation checks that are done by UEFI Secure Boot technology and load a compromised software image on the affected device. A compromised software image is any software image that has not been digitally signed by Cisco.


Remediation

Install update from vendor's website.

References