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Category:   Application (Web Server/CGI)  >   Sun Java Web Proxy Server Vendors:   Sun
Sun Java System Web Proxy Server Protocol Flaw in SSL Renegotiation Lets Remote Users Conduct Man-in-the-Middle Attacks
SecurityTracker Alert ID:  1023427
SecurityTracker URL:  http://securitytracker.com/id/1023427
CVE Reference:   CVE-2009-3555   (Links to External Site)
Date:  Jan 11 2010
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 4.0 - 4.0.12
Description:   A vulnerability was reported in Sun Java System Web Proxy Server. 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.

SPARC Platform

* Sun Java System Web Proxy Server Server 4.0.13 or later

x86 Platform

* Sun Java System Web Proxy Server 4.0.13 or later

Linux

* Sun Java System Web Proxy Server 4.0.13 or later

HP-UX

* Sun Java System Web Proxy Server 4.0.13 or later

Windows

* Sun Java System Web Proxy Server 4.0.13 or later

The vendor's advisory is available at:

http://sunsolve.sun.com/search/document.do?assetkey=1-66-274990-1

Vendor URL:  sunsolve.sun.com/search/document.do?assetkey=1-66-274990-1 (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Any), UNIX (HP/UX), UNIX (Solaris - SunOS), Windows (Any)

Message History:   None.


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