elfutils: Divide-by-zero in arlib_add_symbols function in arlib.c

Divide-by-zero vulnerabilities in the function arlibaddsymbols in arlib.c in elfutils 0.174 allow remote attackers to cause a denial of service application crash with a crafted ELF file, as demonstrated by eu-ranlib, because a zero shentsize is mishandled...

UBUNTU-CVE-2018-18521

Divide-by-zero vulnerabilities in the function arlibaddsymbols in arlib.c in elfutils 0.174 allow remote attackers to cause a denial of service application crash with a crafted ELF file, as demonstrated by eu-ranlib, because a zero shentsize is mishandled...