Recently, a highly critical vulnerability called GHOST has been brought into light. This vulnerability is found in GNU C Library (glibc) which is a widely used part of most Linux distributions. Through this vulnerability, attackers can run malicious code and gain remote access to Linux machines.The vulnerability, dubbed "GHOST" and assigned CVE-2015-0235, was discovered and disclosed by the security researchers from Redwood Shores, California-based security firm Qualys. This vulnerability is considered critical because to exploit hackers need not to know the admin credentials.The vulnerability affects versions of GNU C Library as far back as glibc-2.2, which were released in year 2000. Red Hat recommends its users to update their systems "as soon as possible to mitigate any potential risk."