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Vulnerability of Cisco IOS XR 64-bit: privilege escalation via Preboot eXecution Environment

Synthesis of the vulnerability 

An attacker can bypass restrictions via Preboot eXecution Environment of Cisco IOS XR 64-bit, in order to escalate his privileges.
Impacted systems: Cisco ASR, IOS XR Cisco.
Severity of this alert: 3/4.
Creation date: 04/11/2020.
Références of this alert: CERTFR-2020-AVI-713, cisco-sa-iosxr-pxe-unsign-code-exec-qAa78fD2, CSCvi82550, CSCvq23340, CSCvq31064, CSCvu31574, CVE-2020-3284, VIGILANCE-VUL-33815.

Description of the vulnerability 

An attacker can bypass restrictions via Preboot eXecution Environment of Cisco I...
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This vulnerability impacts software or systems such as Cisco ASR, IOS XR Cisco.

Our Vigil@nce team determined that the severity of this security announce is important.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this computer vulnerability note.

Solutions for this threat 

Fixes for this vulnerability are not yet public.
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