An issue was discovered in icoutils 0.31.1. An out-of-bounds read leading to a buffer overflow was observed in the "simple_vec" function in the "extract.c" source file. This affects icotool.
https://security.gentoo.org/glsa/201801-12
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=854054
http://www.securityfocus.com/bid/96267