Resolution for POODLE SSLv3.0 vulnerability (CVE-2014-3566) for components that do not allow SSLv3 to be disabled via configuration settings

Solution Unverified - Updated -

Environment

  • Red Hat Enterprise Linux 5, 6, 7

Issue

  • How do I address CVE-2014-3566 for components that do not allow SSLv3 to be disabled via configuration settings?
  • How do I avoid impact to OpenLDAP from CVE-2014-3566?
  • How do I avoid impact to cups from CVE-2014-3566?
  • For JBOSSEAP 5.2.0, I can't find security advisories of CVE-2014-3566 for Linux platform. Where can I find this CVE for Red Hat linux?

Resolution

-Some components do not provide configuration parameters that allow SSLv3 to be disabled. Currently, the following components are known to fall into this category:

  • OpenLDAP
  • cups

It is possible to disable SSLv3 for these components by using stunnel. Stunnel provides an encryption wrapper between a remote client and a local (inetd-startable) or remote server, using the OpenSSL library for cryptography.

To disable SSLv3 on stunnel, use the following configuration parameters in the stunnel.conf file:

options = NO_SSLv2
options = NO_SSLv3

Installation and configuration of stunnel is outside the scope of this solution, please consult the man pages and system documentation for more details.

Note: Newer openldap-servers has TLSProtocolMin option. If openldap-servers is openldap-servers-2.4.39-8.el6(for RHEL6), openldap-servers-2.4.39-3.el7(for RHEL7) or later, add "TLSProtocolMin 3.1" in slapd.conf to disable SSLv3. You can refer to man slapd.conf.

Root Cause

A vulnerability was found in the SSLv3.0 protocol. This vulnerability allows a man-in-the-middle attacker to decrypt ciphertext using a padding oracle side-channel attack. For more information about this vulnerability, refer to the following article: POODLE: SSLv3.0 vulnerability (CVE-2014-3566)

Diagnostic Steps

For diagnostic steps, refer to the following article: POODLE: SSLv3.0 vulnerability (CVE-2014-3566)

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