CVE-2021-34756 Explained : Impact and Mitigation
Discover how CVE-2021-34756 impacts Cisco Firepower Threat Defense Software. Learn about the vulnerability, its impact, affected systems, exploitation, and mitigation steps.
Cisco Firepower Threat Defense Software is impacted by multiple vulnerabilities in the Command Line Interface (CLI) that could allow a local attacker to execute arbitrary commands with root privileges. This CVE was published on October 27, 2021.
Understanding CVE-2021-34756
This section will cover the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2021-34756?
The vulnerability in Cisco Firepower Threat Defense Software enables an authenticated local attacker to run arbitrary commands with elevated privileges, posing a significant security risk.
The Impact of CVE-2021-34756
With a CVSSv3.1 base score of 6.7 (Medium Severity), the vulnerability can result in high confidentiality, integrity, and availability impact when exploited locally, without user interaction.
Technical Details of CVE-2021-34756
Let's delve into the specifics of this vulnerability.
Vulnerability Description
The vulnerability allows an authenticated attacker to execute arbitrary commands with root privileges on the affected Cisco Firepower Threat Defense Software instances.
Affected Systems and Versions
The specific affected product is the Cisco Firepower Threat Defense Software, where all versions are vulnerable to this exploitation.
Exploitation Mechanism
To exploit this vulnerability, the attacker needs authentication on the system, enabling them to execute malicious commands with escalated privileges.
Mitigation and Prevention
Understanding how to mitigate and prevent the exploitation of CVE-2021-34756 is crucial.
Immediate Steps to Take
Organizations should apply security best practices and limit privileged access to reduce the attack surface and monitor CLI commands for suspicious activity.
Long-Term Security Practices
Regular security training for staff, implementing the principle of least privilege, and keeping systems updated are essential for long-term security.
Patching and Updates
Cisco has likely released patches or updates to address this vulnerability, and organizations must promptly apply these patches to secure their systems.