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Vulnerability of Cisco UCS C-Series Rack Server: privilege escalation via UEFI Secure Boot Bypass

Synthesis of the vulnerability 

An attacker can bypass restrictions via UEFI Secure Boot Bypass of Cisco UCS C-Series Rack Server, in order to escalate his privileges.
Vulnerable systems: Cisco UCS.
Severity of this threat: 1/4.
Creation date: 19/02/2020.
Références of this weakness: CERTFR-2020-AVI-103, cisco-sa-20200219-ucs-boot-bypass, CSCvn09490, CSCvq27796, CSCvq27803, CVE-2019-1736, VIGILANCE-VUL-31640.

Description of the vulnerability 

An attacker can bypass restrictions via UEFI Secure Boot Bypass of Cisco UCS C-Series Rack Server, in order to escalate his privileges.
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This vulnerability bulletin impacts software or systems such as Cisco UCS.

Our Vigil@nce team determined that the severity of this security note is low.

The trust level is of type confirmed by the editor, with an origin of physical access.

An attacker with a expert ability can exploit this cybersecurity note.

Solutions for this threat 

Cisco UCS C-Series Rack Server: solution CSCvn09490 CSCvq27796 CSCvq27803.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvn09490
  https://tools.cisco.com/bugsearch/bug/CSCvn09490
  https://tools.cisco.com/quickview/bug/CSCvn09490
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq27796
  https://tools.cisco.com/bugsearch/bug/CSCvq27796
  https://tools.cisco.com/quickview/bug/CSCvq27796
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq27803
  https://tools.cisco.com/bugsearch/bug/CSCvq27803
  https://tools.cisco.com/quickview/bug/CSCvq27803
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

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