CVE-2020-3166 Explained : Impact and Mitigation
Learn about CVE-2020-3166, a vulnerability in Cisco FXOS Software allowing unauthorized file access. Discover impact, affected systems, and mitigation steps.
A vulnerability in the CLI of Cisco FXOS Software could allow an authenticated, local attacker to read or write arbitrary files on the underlying operating system (OS). This CVE was published on February 26, 2020.
Understanding CVE-2020-3166
This CVE pertains to a security flaw in Cisco FXOS Software that enables unauthorized file access through the CLI.
What is CVE-2020-3166?
The vulnerability in Cisco FXOS Software allows a local attacker to manipulate files on the OS by exploiting insufficient input validation in a specific CLI command.
The Impact of CVE-2020-3166
The vulnerability has a CVSS base score of 4.2, indicating a medium severity issue. If successfully exploited, an attacker could read or write to arbitrary files on the underlying OS.
Technical Details of CVE-2020-3166
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The flaw in Cisco FXOS Software results from inadequate input validation in the CLI, enabling attackers to execute unauthorized file operations.
Affected Systems and Versions
- Product: Cisco Firepower Extensible Operating System (FXOS)
- Vendor: Cisco
- Version: Unspecified
Exploitation Mechanism
Attackers with high privileges can exploit the vulnerability by injecting crafted arguments into a specific CLI command, allowing them to read or write arbitrary files on the OS.
Mitigation and Prevention
Protecting systems from CVE-2020-3166 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply vendor-recommended patches promptly
- Monitor system logs for any suspicious activities
- Restrict access to critical CLI commands
Long-Term Security Practices
- Regularly update and patch software to mitigate vulnerabilities
- Conduct security training for staff to enhance awareness
- Implement least privilege access controls to limit potential damage
Patching and Updates
Cisco may release patches or updates to address the vulnerability. Stay informed about official advisories and apply patches as soon as they are available.