Rapid7 Vulnerability & Exploit Database

TLS/SSL Server is enabling the BEAST attack

Back to Search

TLS/SSL Server is enabling the BEAST attack

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
09/06/2011
Created
07/25/2018
Added
02/18/2016
Modified
02/18/2016

Description

The SSL protocol, as used in certain configurations of Microsoft Windows and browsers such as Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera (and other products negotiating SSL connections) encrypts data by using CBC mode with chained initialization vectors. This potentially 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. By supporting the affected protocols and ciphers, the server is enabling the clients in to being exploited.

Solution(s)

  • ssl-beast-attack

References

  • ssl-beast-attack

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;