SB2023051206 - Input validation error in IBM System x and Flex Systems Browser Exploit Against SSL/TLS (BEAST) Mitigations 

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Main Vulnerability Database SB2023051206

SB2023051206 - Input validation error in IBM System x and Flex Systems Browser Exploit Against SSL/TLS (BEAST) Mitigations

Published: May 12, 2023

Security Bulletin ID SB2023051206
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Input validation error (CVE-ID: CVE-2011-3389)

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

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.


Remediation

Install update from vendor's website.

References