stb_vorbis is a single file MIT licensed library for processing ogg
vorbis files. A crafted file may trigger memory write past an allocated
heap buffer in start_decoder
. The root cause is a potential integer
overflow in sizeof(char*) * (f->comment_list_length)
which may make
setup_malloc
allocate less memory than required. Since there is
another integer overflow an attacker may overflow it too to force
setup_malloc
to return 0 and make the exploit more reliable. This
issue may lead to code execution.