CVE-2019-1774 : Exploit Details and Defense Strategies
Learn about CVE-2019-1774, a vulnerability in Cisco NX-OS Software's CLI allowing local attackers to run arbitrary commands. Find mitigation steps and impact details here.
A weakness found in Cisco NX-OS Software's command line interface (CLI) allows a local attacker with authentication to run arbitrary commands on the affected device's operating system. This vulnerability stems from inadequate validation of arguments within specific CLI commands.
Understanding CVE-2019-1774
This CVE involves a command injection vulnerability in Cisco NX-OS Software.
What is CVE-2019-1774?
The vulnerability in Cisco NX-OS Software's CLI enables a local authenticated attacker to execute arbitrary commands on the device's OS by manipulating CLI commands with malicious input.
The Impact of CVE-2019-1774
- CVSS Base Score: 6.7 (Medium Severity)
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: High
- Confidentiality Impact: High
- Integrity Impact: High
- Availability Impact: High
Technical Details of CVE-2019-1774
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability allows an authenticated local attacker to execute arbitrary commands on the underlying OS by manipulating CLI commands.
Affected Systems and Versions
- Affected Product: Cisco NX-OS Software
- Vendor: Cisco
- Affected Versions: Less than 8.3(1) (Custom Version)
Exploitation Mechanism
The attacker needs valid administrator credentials to exploit this vulnerability. By injecting malicious input into specific CLI commands, the attacker gains the ability to run arbitrary commands with elevated privileges.
Mitigation and Prevention
Protect your systems from CVE-2019-1774 with the following steps:
Immediate Steps to Take
- Implement strict access controls and limit administrator privileges.
- Regularly monitor and audit CLI commands for unusual activities.
- Apply the latest security patches and updates from Cisco.
Long-Term Security Practices
- Conduct regular security training for administrators on best practices.
- Utilize network segmentation to isolate critical systems.
- Employ intrusion detection systems to detect and prevent unauthorized activities.
Patching and Updates
- Stay informed about security advisories from Cisco.
- Apply patches and updates promptly to address known vulnerabilities.