CVE-2021-40123 : Security Advisory and Response

Cisco Identity Services Engine Software has a vulnerability that allows an authenticated, remote attacker to download restricted files.

Understanding CVE-2021-40123

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an attacker to download restricted files.

What is CVE-2021-40123?

The issue arises due to incorrect permissions settings on the affected device, enabling an attacker with administrative read-only privileges to send a crafted HTTP request and retrieve restricted files.

The Impact of CVE-2021-40123

The base score for this vulnerability is 4.3, with a medium severity level. The attacker can exploit the vulnerability without user interaction and compromise confidentiality.

Technical Details of CVE-2021-40123

The following technical details describe the vulnerability in Cisco Identity Services Engine Software.

Vulnerability Description

Vulnerability in web-based management interface
Allows remote attacker to download restricted files

Affected Systems and Versions

Product: Cisco Identity Services Engine Software
Vendor: Cisco
Versions: n/a

Exploitation Mechanism

The attacker, after gaining authenticated access with administrative read-only privileges, sends a crafted HTTP request to the device, taking advantage of incorrect permissions settings.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2021-40123.

Immediate Steps to Take

Apply the official patch or update provided by Cisco
Restrict network access to the management interface

Long-Term Security Practices

Regular security training for employees on identifying phishing attempts
Implementing network segmentation to contain potential intrusions

Patching and Updates

Keep the Cisco Identity Services Engine Software up to date with the latest security patches and updates