CVE-2011-3389, also known as the BEAST attack, is a vulnerability related to the SSL protocol that affects certain configurations in various systems, including Microsoft Windows, Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products. This vulnerability allows man-in-the-middle attackers to obtain plaintext HTTP headers through a blockwise chosen-boundary attack (BCBA) on an HTTPS session, in conjunction with specific JavaScript code.

How do I know if I'm affected?

If you're using any version of Google Chrome, Microsoft Internet Explorer, Mozilla Firefox, Opera, or Microsoft Windows, you could be affected by the vulnerability. Other affected software includes Siemens Simatic RF68XR Firmware (up to version 3.2.0), Siemens Simatic RF615R Firmware (up to version 3.2.0), Haxx Curl (versions 7.10.6 to 7.23.1), Red Hat Enterprise Linux (all versions), Debian Linux (all versions), and Canonical Ubuntu Linux (versions 10.04, 10.10, 11.04, and 11.10). If you're using any of these software versions, your encrypted communications could be at risk of being intercepted by attackers.

What should I do if I'm affected?

If you're affected by the vulnerability it is important to take action to protect your data. Update your browser, operating system, and any affected plugins to the latest versions, as patches have been released to address this issue. For example, update your Java plugin if you're using Firefox. Always follow recommendations and updates provided by software vendors and organizations to stay secure.

Is this in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2011-3389 vulnerability is not mentioned in CISA's Known Exploited Vulnerabilities Catalog. The vulnerability affects certain configurations in various systems and allows attackers to intercept encrypted communications. To protect your data, it's important to update your browser, operating system, and affected plugins to the latest versions, as patches have been released to address this issue.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as CWE-326, or the BEAST attack is a weakness in SSL encryption that allows attackers to intercept encrypted communications. Updating affected software and plugins can help mitigate this vulnerability.

For more details

CVE-2011-3389 is a vulnerability in SSL encryption that affects various systems and software configurations. To protect your data, update affected software and plugins, and follow security recommendations. For a comprehensive understanding of the vulnerability, including its description, severity, technical details, and known affected software configurations, visit the NVD page or the links below.

• Mozilla Security Blog

• Archived MSDN and TechNet Blogs

• curl - SSL CBC IV vulnerability

• Chrome Stable Release