CVE-2020-8339 : Exploit Details and Defense Strategies

A cross-site scripting inclusion (XSSI) vulnerability was reported in the legacy IBM BladeCenter Advanced Management Module (AMM) web interface prior to version 3.68n [BPET68N]. This vulnerability could allow an authenticated user's AMM credentials to be disclosed if the user is convinced to visit a malicious website, possibly through phishing.

Understanding CVE-2020-8339

This CVE involves a cross-site scripting inclusion vulnerability in the IBM BladeCenter AMM firmware.

What is CVE-2020-8339?

CVE-2020-8339 is a cross-site scripting inclusion (XSSI) vulnerability in the IBM BladeCenter AMM firmware, potentially leading to the disclosure of authenticated user credentials.

The Impact of CVE-2020-8339

The impact of this vulnerability is considered medium, with a CVSS base score of 4.3. It could result in the disclosure of AMM credentials to malicious websites, subject to specific user network knowledge.

Technical Details of CVE-2020-8339

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability allows for cross-site scripting inclusion (XSSI) in the IBM BladeCenter AMM firmware, potentially exposing user credentials.

Affected Systems and Versions

Product: BladeCenter AMM firmware
Vendor: IBM
Vulnerable Version: < 3.68n [BPET68N]
Version Type: Custom

Exploitation Mechanism

Successful exploitation requires the user to visit a malicious website, potentially through phishing.
Specific knowledge about the user's network is needed for the attack.
The user must be logged into AMM and have the ability to connect to both AMM and the malicious website.
Vulnerable when using a web browser that does not inherently protect against this type of attack.
JavaScript code is not executed on AMM itself.

Mitigation and Prevention

Protecting against and addressing the CVE-2020-8339 vulnerability.

Immediate Steps to Take

Upgrade to IBM BladeCenter Advanced Management Module Firmware v3.68n [BPET68N] or newer from IBM Fix Central.

Long-Term Security Practices

Educate users on phishing awareness and safe browsing practices.
Regularly update and patch firmware and software to prevent vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk of similar vulnerabilities in the future.