pgxtoimage(): fix write stack buffer overflow (#997)

diff --git a/src/bin/jp2/convert.c b/src/bin/jp2/convert.c
index 5459f7d44533e0fccc66a4be5eb7fc01cc7f731c..e606c9be70fb55d4a231a7675c55e00c2b9daac6 100644 (file)
--- 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,