CVE-2021-20397 : Vulnerability Insights and Analysis

IBM QRadar SIEM versions 7.3 and 7.4 are vulnerable to cross-site scripting (XSS) attacks, potentially leading to credential disclosure. This CVE was published on May 4, 2021.

Understanding CVE-2021-20397

The vulnerability in IBM QRadar SIEM versions 7.3 and 7.4 allows attackers to inject arbitrary JavaScript code into the Web UI, affecting the system's intended behavior and security.

What is CVE-2021-20397?

IBM QRadar SIEM 7.3 and 7.4 are susceptible to a cross-site scripting vulnerability that could be exploited by malicious users to execute unauthorized actions in the context of a trusted session.

The Impact of CVE-2021-20397

The vulnerability could result in the disclosure of sensitive credentials within a secure session, potentially compromising the confidentiality of data stored or processed by the affected systems.

Technical Details of CVE-2021-20397

The CVSS v3.0 base score for this vulnerability is 6.1, indicating a medium severity issue. The attack complexity is low, user interaction is required, and exploit code maturity is high.

Vulnerability Description

The XSS flaw in IBM QRadar SIEM versions 7.3 and 7.4 allows the insertion of malicious JavaScript code, impacting the integrity and confidentiality of the system.

Affected Systems and Versions

IBM QRadar SIEM versions 7.3 and 7.4 are affected by this vulnerability.

Exploitation Mechanism

Attackers can craft malicious scripts and inject them into the Web UI components, exploiting the vulnerability to execute unauthorized actions and potentially disclose sensitive information.

Mitigation and Prevention

To address CVE-2021-20397, users and administrators should follow immediate steps and implement long-term security practices to safeguard their systems.

Immediate Steps to Take

Apply official fixes and patches provided by IBM to mitigate the vulnerability and prevent exploitation.
Monitor system activity for any signs of unauthorized access or data disclosure.

Long-Term Security Practices

Regularly update and patch the IBM QRadar SIEM software to protect against known vulnerabilities.
Educate users on safe browsing habits and the risks associated with XSS attacks.

Patching and Updates

Stay informed about security bulletins and advisories from IBM to stay ahead of potential threats.
Continuously monitor and assess the security posture of the IBM QRadar SIEM deployment to detect and respond to security incidents promptly.