CVE-2021-1540: Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities
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 |
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Reference Links
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.
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- canonical/cisco asr 5500
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- canonical/cisco virtualized packet core