The SSL certificate and key for www.globalsign.com may have been exposed after a hack on an external server in September. The company said that after investigating the breach it has found no evidence of rogue certificates being issued following the hack. A hacker known as “Comodohacker” compromised other certificate authorities including Comodo and DigiNotar. The investigation revealed that the compromise was limited to a peripheral Web server hosting the CA’s website and did not affect the part of its network that deals with digital certificates.
Source: https://thehackernews.com/2011/12/breach-confirmed-in-globalsign-ssl.html

