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CVE-2019-1736

Multiple Cisco UCS-Based Products UEFI Secure Boot Bypass Vulnerability

Published: Sep 23, 2020Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-347
NVD MITRE
6.6CVSSMEDIUM
EPSS Score
0.2%
Top 84.4%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:PAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:PAttack Vector
Physical
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-347

Affected Products

Cisco Identity Services Engine SoftwareCisco
On-premSecurity Product
Networking Infrastructure
Integrated Management ControllerCisco Systems Inc.
EmbeddedFirmware
Hardware Firmware / network-adapter
Cisco Firepower Management CenterCisco Systems Inc.
On-premNetwork Device
Networking Infrastructure / firewall
Secure Network Server 3500Cisco Systems Inc.
On-prem
Networking Infrastructure / router-switch
Secure Network Server 3600Cisco Systems Inc.
On-prem
Networking Infrastructure / router-switch
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
and 23 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200219-ucs-boot-bypass
tools.cisco.com

Timeline

Published
Sep 23, 2020
Last Updated
Nov 21, 2024

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