From 275735d0354e39c0ac1dc3c0db2120d6f31d1990 Mon Sep 17 00:00:00 2001
From: Even Rouault <[EMAIL REDACTED]>
Date: Mon, 27 Jun 2022 16:09:43 +0200
Subject: [PATCH] _TIFFCheckFieldIsValidForCodec(): return FALSE when passed a
codec-specific tag and the codec is not configured (fixes #433)
This avoids crashes when querying such tags
---
libtiff/tif_dirinfo.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libtiff/tif_dirinfo.c b/libtiff/tif_dirinfo.c
index c30f569b..3371cb5c 100644
--- a/libtiff/tif_dirinfo.c
+++ b/libtiff/tif_dirinfo.c
@@ -1191,6 +1191,9 @@ _TIFFCheckFieldIsValidForCodec(TIFF *tif, ttag_t tag)
default:
return 1;
}
+ if( !TIFFIsCODECConfigured(tif->tif_dir.td_compression) ) {
+ return 0;
+ }
/* Check if codec specific tags are allowed for the current
* compression scheme (codec) */
switch (tif->tif_dir.td_compression) {