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Vulnerability of Cisco IOS XR: denial of service via BGP

Synthesis of the vulnerability 

An attacker can trigger a fatal error via BGP of Cisco IOS XR, in order to trigger a denial of service.
Vulnerable products: Cisco ASR, IOS XR Cisco.
Severity of this weakness: 2/4.
Creation date: 06/08/2020.
Références of this bulletin: CERTFR-2020-AVI-487, cisco-sa-bgp-ErKEqAer, CSCvu54677, CVE-2020-3449, VIGILANCE-VUL-33018.

Description of the vulnerability 

An attacker can trigger a fatal error via BGP of Cisco IOS XR, in order to trigger a denial of service.
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This security alert impacts software or systems such as Cisco ASR, IOS XR Cisco.

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

Solutions for this threat 

Cisco IOS XR: solution CSCvu54677.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu54677
  https://tools.cisco.com/bugsearch/bug/CSCvu54677
  https://tools.cisco.com/quickview/bug/CSCvu54677
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