--- jasper-1.900.1.orig/src/libjasper/jp2/jp2_dec.c	2014-12-11 14:06:44.000000000 +0100

+++ jasper-1.900.1/src/libjasper/jp2/jp2_dec.c	2014-12-11 14:06:26.000000000 +0100

@@ -386,6 +386,11 @@ jas_image_t *jp2_decode(jas_stream_t *in

 	/* Determine the type of each component. */

 	if (dec->cdef) {

 		for (i = 0; i < dec->numchans; ++i) {

+			/* Is the channel number reasonable? */

+			if (dec->cdef->data.cdef.ents[i].channo >= dec->numchans) {

+				jas_eprintf("error: invalid channel number in CDEF box\n");

+				goto error;

+			}

 			jas_image_setcmpttype(dec->image,

 			  dec->chantocmptlut[dec->cdef->data.cdef.ents[i].channo],

 			  jp2_getct(jas_image_clrspc(dec->image),