CVE-2020-3223 : Security Advisory and Response

A vulnerability in the web-based user interface (web UI) of Cisco IOS XE Software allows an authenticated, remote attacker to read arbitrary files on the device's filesystem.

Understanding CVE-2020-3223

This CVE involves a security flaw in Cisco IOS XE Software that could be exploited by an attacker with administrative privileges to access sensitive files.

What is CVE-2020-3223?

The vulnerability in the web UI of Cisco IOS XE Software permits a remote attacker to read arbitrary files on the device's filesystem by exploiting insufficient file scope limiting.

The Impact of CVE-2020-3223

The vulnerability poses a medium severity risk with a CVSS base score of 4.5, allowing attackers to access confidential information on the system.

Technical Details of CVE-2020-3223

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The flaw in the web UI of Cisco IOS XE Software enables attackers to read arbitrary files on the device's filesystem due to inadequate file scope limiting.

Affected Systems and Versions

Product: Cisco IOS XE Software 16.9.4
Vendor: Cisco
Version: n/a

Exploitation Mechanism

Attackers with administrative privileges can create a specific file reference on the filesystem and access it through the web UI, allowing them to read sensitive files.

Mitigation and Prevention

To address CVE-2020-3223, follow these mitigation strategies:

Immediate Steps to Take

Apply vendor patches promptly
Restrict access to the web UI
Monitor file system access for suspicious activities

Long-Term Security Practices

Regularly update and patch software
Implement least privilege access controls

Patching and Updates

Cisco has released patches to address this vulnerability
Regularly check for security advisories and apply updates promptly