CVE-2021-28497 : Vulnerability Insights and Analysis
Learn about CVE-2021-28497 impacting Arista's Metamako Operating System (MOS) on 7130 Systems, allowing unauthorized bash shell access. Explore the impact, affected versions, and mitigation steps.
Arista's Metamako Operating System (MOS) on 7130 Systems is vulnerable to a bash shell access issue, potentially allowing unprivileged users unauthorized access in specific scenarios. This CVE affects various MOS releases across different train versions.
Understanding CVE-2021-20657
This section delves into the details of the CVE-2021-28497 vulnerability affecting Arista's MOS.
What is CVE-2021-20657?
The vulnerability in Arista's MOS software allows unauthorized access to the bash shell for unprivileged users, impacting multiple versions of MOS across different train releases.
The Impact of CVE-2021-20657
With a CVSS base score of 4.4 (Medium Severity), the vulnerability's impact is classified as low availability impact, no confidentiality impact, and low integrity impact. The attack complexity is low, requiring local attack vectors and low privileges.
Technical Details of CVE-2021-20657
This section elaborates on the technical aspects of CVE-2021-28497.
Vulnerability Description
Under certain conditions, unprivileged users can access the bash shell in Arista's MOS software, enabling unauthorized access.
Affected Systems and Versions
The vulnerability affects Arista's Metamako Operating System (MOS) across multiple train versions: MOS-0.1x, MOS-0.2x, and MOS-0.3x.
Exploitation Mechanism
The vulnerability can be exploited by unprivileged users under specific circumstances to gain unauthorized access to the bash shell.
Mitigation and Prevention
This section focuses on mitigation strategies for CVE-2021-28497.
Immediate Steps to Take
To address this vulnerability, users are advised to upgrade to MOS-0.26.7 or MOS-0.32.0. Additionally, the installation of a hotfix is recommended.
Long-Term Security Practices
Maintain regular monitoring and security updates to prevent similar vulnerabilities in the future, ensuring that security best practices are consistently followed.
Patching and Updates
Regularly update Arista's Metamako Operating System to the latest versions and apply relevant security patches to enhance system security.