CVE-2018-0477 : Vulnerability Insights and Analysis

A vulnerability in the CLI parser of Cisco IOS XE Software allows a local attacker with authenticated access to run commands with root privileges on the device's underlying Linux shell.

Understanding CVE-2018-0477

This CVE involves a flaw in Cisco IOS XE Software that enables unauthorized execution of commands with elevated privileges.

What is CVE-2018-0477?

The vulnerability arises from inadequate sanitization of command arguments, granting access to specific internal data structures on the device.

The Impact of CVE-2018-0477

The vulnerability permits an attacker with privileged EXEC mode access to execute customized CLI commands, potentially leading to unauthorized commands with root privileges.

Technical Details of CVE-2018-0477

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw in the CLI parser of Cisco IOS XE Software allows a local attacker to execute commands on the device's Linux shell with root privileges due to improper sanitization of command arguments.

Affected Systems and Versions

Affected Product: Cisco IOS XE Software
Vendor: Cisco
Affected Version: n/a

Exploitation Mechanism

An attacker with privileged EXEC mode access can exploit the vulnerability by executing customized CLI commands.

Mitigation and Prevention

Protective measures to address CVE-2018-0477.

Immediate Steps to Take

Apply vendor-provided patches promptly.
Restrict network access to affected devices.
Monitor for unauthorized access or unusual activity.

Long-Term Security Practices

Regularly update and patch software and firmware.
Implement the principle of least privilege for user access.
Conduct security training and awareness programs for staff.

Patching and Updates

Cisco has released patches to address the vulnerability.
Regularly check for updates and apply them to ensure system security.