CVE-2020-3477 : Vulnerability Insights and Analysis

A vulnerability in the CLI parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to access files from the flash: filesystem.

Understanding CVE-2020-3477

This CVE involves an information disclosure vulnerability in Cisco IOS and IOS XE Software.

What is CVE-2020-3477?

The vulnerability allows a local attacker to access files from the flash: filesystem by exploiting a specific command with insufficient restrictions.

The Impact of CVE-2020-3477

CVSS Base Score: 5.5 (Medium Severity)
Confidentiality Impact: High
Attack Vector: Local
Successful exploitation could grant read-only access to otherwise restricted files.

Technical Details of CVE-2020-3477

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability arises from inadequate restrictions during the execution of a particular command in Cisco IOS and IOS XE Software.

Affected Systems and Versions

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

Exploitation Mechanism

An authenticated, local attacker can exploit the vulnerability by executing a specific command at the command line.

Mitigation and Prevention

Protecting systems from CVE-2020-3477 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Monitor and restrict access to sensitive files.
Implement least privilege access controls.

Long-Term Security Practices

Regularly update and patch software to address vulnerabilities.
Conduct security training for users to prevent social engineering attacks.

Patching and Updates

Stay informed about security advisories from Cisco.
Regularly check for and apply software updates to mitigate known vulnerabilities.