CVE 2007-6731
Extended Module Player (XMP) 2.5.1 and earlier allow remote attackers to execute arbitrary code via an OXM file with a negative value, which bypasses a check in (1) test_oxm and (2) decrunch_oxm functions in misc/oxm.c, leading to a buffer overflow.
See the
CVE page on Mitre.org
for more details.