CVE-2021-1392 : Vulnerability Insights and Analysis

A vulnerability in the CLI command permissions of Cisco IOS and Cisco IOS XE Software could allow an authenticated, local attacker to retrieve the password for Common Industrial Protocol (CIP) and then remotely configure the device as an administrative user.

Understanding CVE-2021-1392

This CVE refers to a privilege escalation vulnerability in Cisco IOS and IOS XE Software.

What is CVE-2021-1392?

The vulnerability allows an authenticated attacker to obtain the CIP password and reconfigure the device remotely.

The Impact of CVE-2021-1392

With a CVSS base score of 7.8, this high-severity vulnerability could lead to unauthorized device reconfiguration.

Technical Details of CVE-2021-1392

The vulnerability is associated with the incorrect permissions of the 'show cip security' CLI command.

Vulnerability Description

The flaw allows attackers to exploit the command to retrieve CIP passwords and potentially gain administrative privileges.

Affected Systems and Versions

The affected systems include Cisco IOS and IOS XE Software with specific versions.

Exploitation Mechanism

An attacker with local access can issue the vulnerable CLI command to retrieve passwords and reconfigure the device.

Mitigation and Prevention

To mitigate the risk posed by this vulnerability, consider the following steps:

Immediate Steps to Take

Cisco recommends immediate password changes and monitoring of CLI command usage.

Long-Term Security Practices

Implement regular security updates and access controls to prevent unauthorized access.

Patching and Updates

Apply the necessary patches provided by Cisco to address the vulnerability.