see http://www.openwall.com/lists/oss-security/2015/01/27/9as a result, most stable and long-term-support distributions were left exposed (and still are):
Debian 7 (wheezy), Red Hat Enterprise Linux 6 & 7, CentOS 6 & 7, Ubuntu 12.04, for example.
Linux GHOST vulnerability
Linux GHOST vulnerability
Just in case you run Linux and haven't noticed:
Re: Linux GHOST vulnerability
Yep... we've been patching this on our servers at work.