CVE-2021-1540 : What You Need to Know
Learn about CVE-2021-1540, multiple authorization bypass vulnerabilities in Cisco ASR 5000 Series Software allowing remote attackers to execute CLI commands. Take immediate steps to mitigate this high severity CVE.
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.
Understanding CVE-2021-1540
This CVE refers to authorization bypass vulnerabilities in Cisco ASR 5000 Series Software, allowing unauthorized execution of CLI commands.
What is CVE-2021-1540?
The CVE-2021-1540 highlights multiple vulnerabilities in the authorization process of Cisco ASR 5000 Series Software that could be exploited by attackers to execute unauthorized CLI commands.
The Impact of CVE-2021-1540
The impact of this CVE is rated as high, with a CVSS base score of 8.1 due to the potential for unauthorized access and execution of CLI commands on affected devices.
Technical Details of CVE-2021-1540
The technical details of this CVE involve the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability allows authenticated, remote attackers to bypass authorization and execute a subset of CLI commands on impacted devices.
Affected Systems and Versions
The affected product is the Cisco ASR 5000 Series Software, with all versions being impacted by this vulnerability.
Exploitation Mechanism
The attacker needs to be authenticated to exploit this vulnerability, enabling them to bypass authorization and execute unauthorized CLI commands.
Mitigation and Prevention
Protecting against CVE-2021-1540 involves immediate steps and long-term security practices to ensure system security and integrity.
Immediate Steps to Take
Administrators are advised to apply relevant security patches and monitor network activity for any unauthorized CLI commands.
Long-Term Security Practices
Implementing stringent access controls, regular security audits, and employee training can enhance overall security posture.
Patching and Updates
Regularly check for updates from Cisco and apply necessary patches to address CVE-2021-1540.