CVE-2019-1781 Explained : Impact and Mitigation
Learn about CVE-2019-1781, a vulnerability in Cisco FXOS and NX-OS Software allowing local attackers to execute commands on affected devices' operating systems. Find mitigation steps and long-term security practices here.
A weakness in the Command Line Interface (CLI) of Cisco FXOS Software and Cisco NX-OS Software could allow a local attacker to execute commands on the underlying operating system. This vulnerability stems from inadequate validation of CLI command arguments, enabling the attacker to input malicious content and execute commands with elevated privileges.
Understanding CVE-2019-1781
This CVE involves a command injection vulnerability in Cisco FXOS and NX-OS Software.
What is CVE-2019-1781?
The vulnerability allows authenticated local attackers to run commands on affected devices' operating systems by exploiting insufficient validation of CLI command arguments.
The Impact of CVE-2019-1781
- CVSS Score: 6.7 (Medium Severity)
- Attack Vector: Local
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
- Privileges Required: High
Technical Details of CVE-2019-1781
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from the lack of thorough validation of arguments in specific CLI commands, allowing attackers to execute arbitrary commands with elevated privileges.
Affected Systems and Versions
- Affected Product: Cisco NX-OS Software
- Vendor: Cisco
- Affected Versions: Less than 8.3(1) (unspecified version)
Exploitation Mechanism
Attackers with administrator credentials can input malicious content as command arguments to exploit the vulnerability and execute unauthorized commands on the underlying operating system.
Mitigation and Prevention
Protect your systems from CVE-2019-1781 with these mitigation strategies.
Immediate Steps to Take
- Implement strict access controls to limit CLI command execution.
- Regularly monitor and audit CLI commands for unusual activities.
Long-Term Security Practices
- Conduct regular security training to educate users on safe CLI command practices.
- Keep systems updated with the latest security patches and firmware releases.
Patching and Updates
Apply vendor-recommended patches and updates to address the vulnerability effectively.