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Category:   Application (Web Server/CGI)  >   IBM WebSphere MQ Vendors:   IBM
IBM WebSphere MQ Internet pass-thru Protocol Flaw in SSL Renegotiation Lets Remote Users Conduct Man-in-the-Middle Attacks
SecurityTracker Alert ID:  1024789
SecurityTracker URL:  http://securitytracker.com/id/1024789
CVE Reference:   CVE-2009-3555   (Links to External Site)
Date:  Nov 27 2010
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in IBM WebSphere MQ Internet pass-thru (MQIPT). A remote user can conduct a man-in-the-middle attack on SSL session renegotiation.

A remote user with the ability to conduct a man-in-the-middle attack can exploit a flaw in the underlying SSL/TLS protocol to inject arbitrary plain text into the exchange between the client and the server, with the arbitrary data as a prefix to the session.

The vulnerability resides in the TLS 1.0 or later and SSLv3 protocols.

Marsh Ray of PhoneFactor and Martin Rex independently reported this vulnerability.

[Editor's note: The flaw resides in the protocol and not in the protocol implementation. Some vendors are implementing a temporary workaround that prohibits session renegotiation until the protocol itself can be modified. Several protocol implementations are affected, including OpenSSL, GnuTLS, Network Security Services, and Java Secure Socket Extension.]

Impact:   A remote user can with the ability to conduct a man-in-the-middle attack can inject arbitrary plain text data into the exchange, preceding the session data.
Solution:   The vendor has issued a fix (MS81; SupportPac 2.0.0.3).

The vendor's advisory is available at:

http://www-01.ibm.com/support/docview.wss?uid=swg24006386

Vendor URL:  www-01.ibm.com/support/docview.wss?uid=swg24006386 (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (AIX), UNIX (HP/UX), UNIX (Solaris - SunOS), Windows (Any)

Message History:   None.


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