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Vulnerability of Cisco IOS XR/NX-OS: privilege escalation via IPv6 ACL Bypass

Synthesis of the vulnerability 

An attacker can bypass restrictions via IPv6 ACL Bypass of Cisco IOS XR or NX-OS, in order to escalate his privileges.
Vulnerable software: IOS XR Cisco, Nexus by Cisco, NX-OS.
Severity of this announce: 2/4.
Creation date: 03/02/2021.
Références of this computer vulnerability: CERTFR-2021-AVI-082, cisco-sa-ipv6-acl-CHgdYk8j, CSCvm55638, CSCvv45698, CVE-2021-1389, VIGILANCE-VUL-34477.

Description of the vulnerability 

An attacker can bypass restrictions via IPv6 ACL Bypass of Cisco IOS XR or NX-OS...
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This computer threat note impacts software or systems such as IOS XR Cisco, Nexus by Cisco, NX-OS.

Our Vigil@nce team determined that the severity of this weakness alert is medium.

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

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

Solutions for this threat 

This vulnerability patch will be public soon.
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