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CVE-2011-3389

MediumPublished

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other...

Published: Sep 6, 2011
Updated: Aug 6, 2024
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

4.3/ 10Medium

nvd · CVSS 2.0

AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS probability estimate

73.3%

High · next 30 days

Percentile: 99.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products, encrypts data by using CBC mode with chained initialization vectors, which allows man-in-the-middle attackers to obtain plaintext HTTP headers via a blockwise chosen-boundary attack (BCBA) on an HTTPS session, in conjunction with JavaScript code that uses (1) the HTML5 WebSocket API, (2) the Java URLConnection API, or (3) the Silverlight WebClient API, aka a "BEAST" attack.

Sources

BEAST-PoCPoC
:muscle: Proof Of Concept of the BEAST attack against SSL/TLS CVE-2011-3389 :muscle:

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