elfutils: Heap-based buffer over-read in libdw/dwarf_getabbrev.c and libwd/dwarf_hasattr.c causes crash
libdw in elfutils 0.173 checks the end of the attributes list incorrectly in dwarf_getabbrev in dwarf_getabbrev.c and dwarf_hasattr in dwarf_hasattr.c, leading to a heap-based buffer over-read and an application crash.