The process_envvars function in elf/rtld.c in the GNU C Library (aka
glibc or libc6) before 2.23 allows local users to bypass a
pointer-guarding protection mechanism via a zero value of the
LD_POINTER_GUARD environment variable.
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MLIST:[oss-security] 20160119 Re: CVE assignment request for security bugs fixed in glibc 2.23
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