What is CVE-2021-1540?

CVE-2021-1540 is a vulnerability in the authorization process of Cisco ASR 5000 Series Software (StarOS) that could allow an authenticated, remote attacker to bypass authorization and execute a subset of CLI commands on an affected device.

How severe is CVE-2021-1540?

CVE-2021-1540 has a severity score of 7.2 out of 10, which is considered high severity.

Which software versions are affected by CVE-2021-1540?

CVE-2021-1540 affects Cisco ASR 5000 Series Software (StarOS) versions 21.16.9 to 21.20.8.

How can an attacker exploit CVE-2021-1540?

An authenticated, remote attacker can exploit CVE-2021-1540 by bypassing authorization and executing a subset of CLI commands on the affected device.

Is there a fix for CVE-2021-1540?

Cisco has released patches to address CVE-2021-1540. It is recommended to update to the latest version of Cisco ASR 5000 Series Software (StarOS) to mitigate this vulnerability.

Vulnerability/
CVE-2021-1540

high

8.1

CWE

863

4/6/2021

14/6/2021

CVE-2021-1540

First published: Fri Jun 04 2021(Updated: )

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. For more information about these vulnerabilities, see the Details section of this advisory.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco StarOS	<21.16.9
Cisco StarOS	>=21.17.0<21.17.10
Cisco StarOS	>=21.18.0<21.18.16
Cisco StarOS	>=21.19.0<21.19.11
Cisco StarOS	>=21.19.n<21.19.n7
Cisco StarOS	>=21.20.0<21.20.8
Cisco ASR 5000
Cisco ASR 5500
Cisco Asr 5700
Cisco Virtualized Packet Core

Never miss a vulnerability like this again

Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr5k-autho-bypass-mJDF5S7n

Frequently Asked Questions

What is CVE-2021-1540?
CVE-2021-1540 is a vulnerability in the authorization process of Cisco ASR 5000 Series Software (StarOS) that could allow an authenticated, remote attacker to bypass authorization and execute a subset of CLI commands on an affected device.
How severe is CVE-2021-1540?
CVE-2021-1540 has a severity score of 7.2 out of 10, which is considered high severity.
Which software versions are affected by CVE-2021-1540?
CVE-2021-1540 affects Cisco ASR 5000 Series Software (StarOS) versions 21.16.9 to 21.20.8.
How can an attacker exploit CVE-2021-1540?
An authenticated, remote attacker can exploit CVE-2021-1540 by bypassing authorization and executing a subset of CLI commands on the affected device.
Is there a fix for CVE-2021-1540?
Cisco has released patches to address CVE-2021-1540. It is recommended to update to the latest version of Cisco ASR 5000 Series Software (StarOS) to mitigate this vulnerability.

collector/nvd-index
vendor/cisco
canonical/cisco staros
version/cisco staros/21.17.0
version/cisco staros/21.18.0
version/cisco staros/21.19.0
version/cisco staros/21.19.n
version/cisco staros/21.20.0
canonical/cisco asr 5000
canonical/cisco asr 5500
canonical/cisco asr 5700
canonical/cisco virtualized packet core

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.