cisco-sa-asr5k-autho-bypass-mJDF5S7n: Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities

Reference Links

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr5k-autho-bypass-mJDF5S7n (Advisory)

Child vulnerabilities

(Contains the following vulnerabilities)

• CVE-2021-1539
• CVE-2021-1540

Frequently Asked Questions

• What are the vulnerabilities in Cisco ASR 5000 Series Software Authorization Bypass?

  Multiple vulnerabilities in the authorization process of Cisco ASR 5000 Series Software (StarOS) could allow an authenticated, remote attacker to bypass authorization and execute a subset of CLI commands on an affected device.

• How can an attacker exploit the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities?

  An attacker needs to be authenticated and remote in order to exploit the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities.

• What is the severity level of the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities?

  The severity level of the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities is high (8.1).

• Which versions of Cisco StarOS are affected by the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities?

  The affected versions of Cisco StarOS include 21.20, up to 21.20.8, 21.19, up to 21.19.n7, 21.18, up to 21.18.16, 21.17, up to 21.17.10, and 21.16, up to 21.16.9.

• How can I mitigate the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities?

  To mitigate the Cisco ASR 5000 Series Software Authorization Bypass vulnerabilities, it is recommended to migrate to version 21.16.9 or later.