CVE-2021-39036 Explained : Impact and Mitigation

This CVE article discusses a cross-site scripting vulnerability in IBM Cognos Analytics versions 11.1 and 11.2 that could lead to potential credential disclosure.

Understanding CVE-2021-39036

This section provides a detailed insight into the nature and impact of the vulnerability.

What is CVE-2021-39036?

CVE-2021-39036 refers to a cross-site scripting vulnerability in IBM Cognos Analytics 11.1 and 11.2. This vulnerability enables malicious users to inject arbitrary JavaScript code into the Web UI, potentially compromising user credentials within a trusted session.

The Impact of CVE-2021-39036

The CVE has a base severity score of 6.1 (Medium). It poses a risk of altering the intended functionality of the application, leading to unauthorized access and credential disclosure.

Technical Details of CVE-2021-39036

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability (CWE-79) arises from improper neutralization of input during web page generation, allowing for cross-site scripting attacks in IBM Cognos Analytics.

Affected Systems and Versions

Product: Cognos Analytics
Vendor: IBM
Affected Versions: 11.1, 11.2

Exploitation Mechanism

Attack Vector: Network
Attack Complexity: Low
User Interaction: Required
Privileges Required: None
Scope: Changed
Impact Metrics: Confidentiality and Integrity impact are Low; Availability impact is None
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Vulnerability Scenarios: General

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-39036.

Immediate Steps to Take

Update IBM Cognos Analytics to a patched version immediately.
Implement input validation mechanisms to mitigate cross-site scripting attacks.

Long-Term Security Practices

Regularly educate users on safe browsing practices and phishing awareness.
Conduct periodic security assessments and penetration testing to identify and remediate vulnerabilities.
Stay informed about security advisories and updates related to IBM Cognos Analytics.
Consider implementing a Web Application Firewall (WAF) to add an additional layer of defense.

Patching and Updates

IBM has released patches to address the cross-site scripting vulnerability in IBM Cognos Analytics. Ensure timely application of these patches to secure your system effectively.