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Cisco UCS Device: Improper Verification of Cryptographic Signature (CVE-2019-1736)

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Cisco UCS Device: Improper Verification of Cryptographic Signature (CVE-2019-1736)

Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
09/23/2020
Created
12/09/2020
Added
12/08/2020
Modified
12/08/2020

Description

A vulnerability in the firmware of the Cisco UCS C-Series Rack Servers could allow an authenticated, physical attacker to bypass Unified Extensible Firmware Interface (UEFI) Secure Boot validation checks and load a compromised software image on an affected device. The vulnerability is due to improper validation of the server firmware upgrade images. An attacker could exploit this vulnerability by installing 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.

Solution(s)

  • cisco-ucs-update-latest

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