CVE-2020-3236 Explained : Impact and Mitigation

A vulnerability in the CLI of Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, local attacker to gain root shell access to the underlying operating system and overwrite or read arbitrary files.

Understanding CVE-2020-3236

This CVE involves a path traversal vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) that could lead to unauthorized access and file manipulation.

What is CVE-2020-3236?

The vulnerability in the CLI of Cisco NFVIS allows a local attacker with valid administrative credentials to exploit improper input validation and gain root shell access, potentially compromising the system's integrity and confidentiality.

The Impact of CVE-2020-3236

CVSS Base Score: 6.7 (Medium Severity)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Technical Details of CVE-2020-3236

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability stems from improper input validation of CLI command arguments, allowing attackers to execute path traversal techniques and access sensitive files.

Affected Systems and Versions

Affected Product: Cisco Enterprise NFV Infrastructure Software
Affected Version: Not applicable (n/a)

Exploitation Mechanism

Attackers can exploit this vulnerability by using path traversal techniques when executing a vulnerable command, leading to unauthorized access and potential data manipulation.

Mitigation and Prevention

Protecting systems from CVE-2020-3236 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-recommended patches or updates promptly.
Monitor system logs for any suspicious activities.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement the principle of least privilege to limit access rights.
Conduct regular security audits and penetration testing.

Patching and Updates

Cisco may release patches or updates to address this vulnerability.
Stay informed about security advisories and apply patches as soon as they are available.