File jasper-CVE-2018-20570.patch of Package jasper.16208

Index: jasper-2.0.14/src/libjasper/jp2/jp2_enc.c
===================================================================
--- jasper-2.0.14.orig/src/libjasper/jp2/jp2_enc.c
+++ jasper-2.0.14/src/libjasper/jp2/jp2_enc.c
@@ -293,7 +293,8 @@ int jp2_encode(jas_image_t *image, jas_s
 	needcdef = 1;
 	switch (jas_clrspc_fam(jas_image_clrspc(image))) {
 	case JAS_CLRSPC_FAM_RGB:
-		if (jas_image_cmpttype(image, 0) ==
+		if (jas_image_numcmpts(image) >= 3 &&
+		  jas_image_cmpttype(image, 0) ==
 		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R) &&
 		  jas_image_cmpttype(image, 1) ==
 		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G) &&
@@ -302,7 +303,8 @@ int jp2_encode(jas_image_t *image, jas_s
 			needcdef = 0;
 		break;
 	case JAS_CLRSPC_FAM_YCBCR:
-		if (jas_image_cmpttype(image, 0) ==
+		if (jas_image_numcmpts(image) >= 3 &&
+		  jas_image_cmpttype(image, 0) ==
 		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_Y) &&
 		  jas_image_cmpttype(image, 1) ==
 		  JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_CB) &&
@@ -311,7 +313,8 @@ int jp2_encode(jas_image_t *image, jas_s
 			needcdef = 0;
 		break;
 	case JAS_CLRSPC_FAM_GRAY:
-		if (jas_image_cmpttype(image, 0) ==
+		if (jas_image_numcmpts(image) >= 1 &&
+		  jas_image_cmpttype(image, 0) ==
 		  JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_GRAY_Y))
 			needcdef = 0;
 		break;