CVE-2019-1812 : Vulnerability Insights and Analysis

Cisco NX-OS CLI Command Software Image Signature Verification Vulnerabilities

Understanding CVE-2019-1812

This CVE involves a weakness in the Image Signature Verification feature of Cisco NX-OS Software, allowing an attacker to install malicious software on a device.

What is CVE-2019-1812?

An authenticated, local attacker with administrator-level credentials can exploit a vulnerability in Cisco NX-OS Software to install unsigned software images.

The Impact of CVE-2019-1812

CVSS Score: 6.7 (Medium Severity)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
The vulnerability arises from improper verification of software digital signatures during CLI command execution.

Technical Details of CVE-2019-1812

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw allows an attacker to bypass Image Signature Verification and install unauthorized software images.

Affected Systems and Versions

Affected Product: Cisco NX-OS Software
Versions Affected: Less than 8.3(1) (unspecified)

Exploitation Mechanism

Attackers with administrator-level credentials can exploit the vulnerability to execute unauthorized software commands.

Mitigation and Prevention

Protecting systems from CVE-2019-1812 requires immediate action and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches promptly.
Monitor for any unauthorized software installations.

Long-Term Security Practices

Implement the principle of least privilege for user accounts.
Regularly review and update access controls.

Patching and Updates

Regularly check for security advisories and updates from Cisco.