This indicates an attack attempt against a Buffer Overflow vulnerability in GNU C Library (glibc).
The vulnerability is caused by an error in getaddrinfo() glibc function call. It allows a remote attacker to execute arbitrary code on vulnerable systems.
GNU C Library (glibc) versions from 2.9 to 2.22
System Compromise: Remote attacker can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.