Multiple heap-based buffer overflows in loaders/load_it.c in libmikmod, possibly 3.1.12, might allow remote attackers to execute arbitrary code via (1) crafted samples or (2) crafted instrument definitions in an Impulse Tracker file, related to panpts, pitpts, and IT_ProcessEnvelope.  NOTE: some of these details are obtained from third party information.  NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-3995.