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.
Details: : http://heartbleed.com/
UMP and Heartbleed:
UMP is currently supported on SAP NetWeaver and on Redhat JBoss. Both SAP and JBoss are not affected by the Heartbleed bug. SAP customers can read more here: https://service.sap.com/~sapidb/011000358700000308332014E/ (SAP Login required) and JBoss customers can check this: https://access.redhat.com/solutions/785113 and http://anil-identity.blogspot.in/2014/04/jbosswildflyas-openssl-heartbleed.html?m=1
As such UMP is not affected by the Heartbleed. Additionally, the public UMP sites can be tested against Heartbleed online tests such as http://safeweb.norton.com/heartbleed. Nevertheless, in order to overcome any rare scenarios also, Unvired aligns with the general advice to change passwords used on affected websites.