CVE-2021-36309 : Exploit Details and Defense Strategies

Dell Enterprise SONiC OS, versions 3.3.0 and earlier, has been identified with a sensitive information disclosure vulnerability. This vulnerability allows an authenticated malicious user to access TACACS\Radius credentials and exploit sensitive information for further attacks.

Understanding CVE-2021-36309

This section will delve into the specifics of the CVE-2021-36309 vulnerability.

What is CVE-2021-36309?

CVE-2021-36309 refers to a sensitive information disclosure vulnerability present in Dell Enterprise SONiC OS, versions 3.3.0 and earlier. It enables authenticated malicious users to utilize stored TACACS\Radius credentials to retrieve and misuse sensitive data for subsequent attacks.

The Impact of CVE-2021-36309

The impact of CVE-2021-36309 is considered high, with a base score of 7.1 according to the CVSS v3.1 metrics. This vulnerability can result in significant confidentiality, integrity, and availability impacts on affected systems.

Technical Details of CVE-2021-36309

This section will provide a technical overview of CVE-2021-36309.

Vulnerability Description

The vulnerability in Dell Enterprise SONiC OS allows authenticated malicious users to access TACACS\Radius credentials for unauthorized retrieval of sensitive information.

Affected Systems and Versions

The affected product is Dell Enterprise SONiC OS with versions 3.3.0 and earlier. Versions less than 3.4.0 are at risk of exploitation.

Exploitation Mechanism

An authenticated malicious user with system access can exploit this vulnerability to extract sensitive information stored in TACACS\Radius credentials.

Mitigation and Prevention

This section covers strategies to mitigate and prevent the exploitation of CVE-2021-36309.

Immediate Steps to Take

To address CVE-2021-36309, users should apply security updates provided by Dell promptly. Additionally, review and restrict access to TACACS\Radius credentials to authorized personnel.

Long-Term Security Practices

Implement security best practices such as regular security audits, user access control, and monitoring for unusual activities to enhance overall system security and resilience.

Patching and Updates

Regularly monitor Dell's security advisories and apply patches and updates as soon as they are released to prevent potential exploitation of vulnerabilities.