http://openwall.com/lists/oss-security/2017/08/28/4
https://github.com/uclouvain/openjpeg/commit/e5285319229a5d77bf316bb0d3a6cbd3cb8666d9.patch

From e5285319229a5d77bf316bb0d3a6cbd3cb8666d9 Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Fri, 18 Aug 2017 13:39:20 +0200
Subject: [PATCH] pgxtoimage(): fix write stack buffer overflow (#997)

---
 src/bin/jp2/convert.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bin/jp2/convert.c b/src/bin/jp2/convert.c
index 5459f7d44..e606c9be7 100644
--- a/src/bin/jp2/convert.c
+++ b/src/bin/jp2/convert.c
@@ -1185,7 +1185,7 @@ opj_image_t* pgxtoimage(const char *filename, opj_cparameters_t *parameters)
     }
 
     fseek(f, 0, SEEK_SET);
-    if (fscanf(f, "PG%[ \t]%c%c%[ \t+-]%d%[ \t]%d%[ \t]%d", temp, &endian1,
+    if (fscanf(f, "PG%31[ \t]%c%c%31[ \t+-]%d%31[ \t]%d%31[ \t]%d", temp, &endian1,
                &endian2, signtmp, &prec, temp, &w, temp, &h) != 9) {
         fclose(f);
         fprintf(stderr,
