On 10/15/14, 10:17 AM, Jan Lieskovsky wrote:
Hello folks, in relation to the recent SSLv3 CVE-2014-3566 / "POODLE" flaw: [1] http://fedoramagazine.org/what-you-need-to-know-about-the-sslv3-poodle-flaw-cve-2014-3566/ got wondering if there's anything SSG should do to react against it. Possibly to add / update system service rules checking for system SSL version that it is higher than SSLv3? [1] suggest httpd would be one candidate, but I am sure there would be more of them. Should this be investigated further & particular rules updated? Thanks && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat Security Technologies Team P.S.: For those possibly wondering the proposal is not to add rule checking particular package version is >= than the updated version disabling use of SSLv3 (IOW not to perform the CVE check itself). But rather check configuration of possibly affected system services, if they aren't using SSLv3 via their configuration files (since setting default SSL version higher than SSLv3 is one thing, but actually checking if that version isn't enabled again [by administrator] an another one).
Already reflect using TLS for SMTP:
http://people.redhat.com/swells/scap-security-guide/RHEL/6/output/rhel6-guide-custom.html#postfix_server_mail_relay_require_tls_for_smtp_auth
And using TLS for LDAP:
http://people.redhat.com/swells/scap-security-guide/RHEL/6/output/rhel6-guide-custom.html#ldap_client_start_tls
http://people.redhat.com/swells/scap-security-guide/RHEL/6/output/rhel6-guide-custom.html#ldap_client_tls_cacertpath
And using TLS for SSL:
http://people.redhat.com/swells/scap-security-guide/RHEL/6/output/rhel6-guide-custom.html#network_ssl
And then specifically calls out using FIPS 140-2 certified ciphers, which means the system forces protocols of TLSv1.1 and TLSv1.0 and disables all other ciphers but the FIPS ones:
http://people.redhat.com/swells/scap-security-guide/RHEL/6/output/rhel6-guide-custom.html#sshd_use_approved_ciphers
Big RHT has published some guidance for services such as Tomcat, Firefox/Chrome, and httpd here:
https://access.redhat.com/articles/1232123
Pulling in the guidance for Apache makes sense... something like
set the SSLProtocol directive as follows in /etc/httpd/conf.d/ssl.conf:
Disable everything except TLSv1.xOn RHEL 7 or RHEL 6.6 and later:
SSLProtocol -All +TLSv1 +TLSv1.1 +TLSv1.2