glibc-2.17-157.el7.4

The glibc package contains standard libraries which are used by
multiple programs on the system. In order to save disk space and
memory, as well as to make upgrading easier, common system code is
kept in one place and shared between programs. This particular package
contains the most important sets of shared libraries: the standard C
library and the standard math library. Without these two libraries, a
Linux system will not function.

Security issues fixed with this release:

CVE-2017-1000366
glibc contains a vulnerability that allows specially crafted
LD_LIBRARY_PATH values to manipulate the heap/stack, causing them to
alias, potentially resulting in arbitrary code execution. Please note
that additional hardening changes have been made to glibc to prevent
manipulation of stack and heap memory but these issues are not
directly exploitable, as such they have not been given a CVE. This
affects glibc 2.25 and earlier.