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Vulnerability of Cisco IOS XR: privilege escalation via CLI Task Group Assignment

Synthesis of the vulnerability 

An attacker can bypass restrictions via CLI Task Group Assignment of Cisco IOS XR, in order to escalate his privileges.
Impacted software: IOS XR Cisco.
Severity of this computer vulnerability: 2/4.
Creation date: 03/09/2020.
Références of this announce: CERTFR-2020-AVI-545, cisco-sa-iosxr-LJtNFjeN, CSCvs12604, CVE-2020-3473, VIGILANCE-VUL-33226.

Description of the vulnerability 

An attacker can bypass restrictions via CLI Task Group Assignment of Cisco IOS XR, in order to escalate his privileges.
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This weakness note impacts software or systems such as IOS XR Cisco.

Our Vigil@nce team determined that the severity of this threat note is medium.

The trust level is of type confirmed by the editor, with an origin of user account.

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

Solutions for this threat 

Cisco IOS XR: solution CSCvs12604.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs12604
  https://tools.cisco.com/bugsearch/bug/CSCvs12604
  https://tools.cisco.com/quickview/bug/CSCvs12604
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