lib/info.c in libvorbis 1.1.2, and possibly other versions before
1.2.0, allows context-dependent attackers to cause a denial of service
and possibly execute arbitrary code via invalid (1) blocksize_0 and
(2) blocksize_1 values, which trigger a "heap overwrite" in the
_01inverse function in res0.c. NOTE: this issue has been RECAST so
that CVE-2007-4029 handles additional vectors.