A buffer overflow in glibc 2.5 (released on September 29, 2006) and can be triggered through the LD_LIBRARY_PATH environment variable. Please note that many versions of glibc are not vulnerable to this issue if patched for CVE-2017-1000366.
https://www.exploit-db.com/exploits/43331/
https://security.netapp.com/advisory/ntap-20190404-0003/