Are you affected by this? You should update your OpenSSL as soon as possible.
The Heartbleed Bug is a serious vulnerability in the popular OpenSSL cryptographic software library. This weakness allows stealing the information protected, under normal conditions, by the SSL/TLS encryption used to secure the Internet. SSL/TLS provides communication security and privacy over the Internet for applications such as web, email, instant messaging (IM) and some virtual private networks (VPNs).
The Heartbleed bug allows anyone on the Internet to read the memory of the systems protected by the vulnerable versions of the OpenSSL software. This compromises the secret keys used to identify the service providers and to encrypt the traffic, the names and passwords of the users and the actual content. This allows attackers to eavesdrop on communications, steal data directly from the services and users and to impersonate services and users.
First you need to test your server/website: http://filippo.io/Heartbleed/
To fix it for Centos 6 follow these steps:
wget https://www.openssl.org/source/openssl-1.0.1g.tar.gz -O openssl-1.0.1g.tar.gz
tar -zxf openssl-1.0.1g.tar.gz
If it shows old version do the steps below.
mv /usr/bin/openssl /root/
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
OpenSSL 1.0.1g 7 Apr 2014
And please restart Apache in order to get the update running.
And test again your website: http://filippo.io/Heartbleed/