Disallowing ssl2

John Almberg jalmberg at identry.com
Tue Nov 11 05:50:57 PST 2008

My server got an audit for PCI compliance and was red-flagged for  
allowing SSL2 connections, which they have some problem with. They  
want the server to use SSL3 or TLS:

"Synopsis : The remote service encrypts traffic using a protocol with  
known weaknesses. Description : The remote service accepts  
connections encrypted using SSL 2.0, which reportedly suffers from  
several cryptographic flaws and has been deprecated for several  
years. An attacker may be able to exploit these issues to conduct man- 
in-the-middle attacks or decrypt communications between the affected  
service and clients. See also : http://www.schneier.com/paper-ssl.pdf  
Solution: Consult the application's documentation to disable SSL 2.0  
and use SSL 3.0 or TLS 1.0 instead. See http://support.microsoft.com/ 
kb/216482 for instructions on IIS. See http://httpd.apache.org/docs/ 
2.0/mod/mod _ssl.html for Apache. Risk Factor: Medium  / CVSS Base  
Score : 2 (AV:R/AC:L/Au:NR/C:P/A:N/I:N/B:N) "

They want me to do this for https, imaps, and pop3s protocols...

Before I dig into this, I was wondering, is this even possible? Will  
anything break as a result?

-- John

More information about the freebsd-questions mailing list