First, DON'T capitulate. He is not only an idiot but DANGEROUSLY wrong. In fact, releasing this information would violate the PCI standard (which is what I'm assuming the audit is for since it's a payment processor) along with every other standard out there and just plain common sense. It would also expose your company to all sorts of liabilities.
The next thing I would do is send an email to your boss saying he needs to get corporate counsel involved to determine the legal exposure the company would be facing by proceeding with this action.
This last bit is up to you, but I would contact VISA with this information and get his PCI auditor status pulled.
If their only complaint is MD5-based MAC, you should be able to simply add the !MD5
element to your existing cipher suite to meet the recommendation.
That said, I see they complain about the use of the CBC mode as well. Unfortunately, there is no CBC
cipher group. The recommendation given to you also does not exclude CBC mode cipherspecs, at least on my version of openSSL (1.0.1e). This is a shame. If you need all such ciphers to be excluded, you could exclude all the CBC ones explicitly, though you will have to update that as they are included. Note that even HIGH
includes CBC ciphers.
Including both ALL
and RC4+RSA
is redundant. I would be loathe to trust a security consultant (even a computerized one) that cannot even construct a well-formed cipherspec that meets their own recommendations.
The SSLCipherSuite
takes an OpenSSL cipher spec. You can find this in the openssl documentation (link), but I find that this documentation is usually quite out of date. However, you can test one by running openssl ciphers ${cipherspec}
on your server; output will be a :
-separated list of ciphers that would be allowed by the given spec, or an error indicating none were allowed.
Similarly, if you want to know what LOW
contains, do:
falcon@tiernyn ~ $ openssl ciphers 'LOW'
EDH-RSA-DES-CBC-SHA:EDH-DSS-DES-CBC-SHA:ADH-DES-CBC-SHA:DES-CBC-SHA:DES-CBC-MD5
!LOW
means to exclude those ones. +HIGH
means to prefer the high-security ones in the ordering.
If you want a line-delimited list of all the ciphers that use CBC in your cipherspec, do:
openssl ciphers ${cipherspec} | sed 's/:/\n/g' | grep CBC
Those are the ones you'd have to exclude. You may, however, find it more reasonable to grep -v CBC
and include only those (just set them up in a :
-delimited list and use that as the cipherspec).
Best Answer
Change SSLProtocol and SSLCipherSuite lines to,
Reload your apache for the configuration to take effect.
The SSLHonorCipherOrder On will try the ciphers in the order it is specified.
Above configuration passes the check on ssllabs.com except for TLS version. My CentOS 6 only supports TLS 1.0 because of OpenSSL 1.0.0. OpenSSL 1.0.1 supports TLS 1.1 and 1.2.
Do you have any load balancer or proxy in front of your apache?