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Description of problem:
When creating a SSL context using one of SSLv23_*method(), openssl permits also weak ciphers (LOW and EXP groups). These ciphers are obsolete for really long time and they should not be used unless explicitly enabled.
Version-Release number of selected component (if applicable):
openssl-1.0.1e-15.el6.x86_64
How reproducible:
always
Steps to Reproduce:
server:
1. set up an openssl-based server with no cipher/tls version preference
2. connect to the server with "openssl s_client <...> -cipher 'LOW:EXP'" (or testing tools from gnutls or nss set to just weak ciphers)
client:
1. run "openssl s_server ... -cipher 'EXP:LOW'"
2. connect to the server with unsuspecting openssl-based client that uses just SSL_CTX_new(SSLv23_method())
Actual results:
connection is established in both cases
Expected results:
connection should fail unless the weak cipher suites are explicitly enabled
Additional info:
I'm sorry but this is a kind of thing we cannot do in released version of RHEL.
We could still do this in RHEL-7, but even there it needs serious reasoning.