| CVE: CVE-2022-0908 |
| Upstream-Status: Backport |
| Signed-off-by: Ross Burton <ross.burton@arm.com> |
| |
| From ef5a0bf271823df168642444d051528a68205cb0 Mon Sep 17 00:00:00 2001 |
| From: Even Rouault <even.rouault@spatialys.com> |
| Date: Thu, 17 Feb 2022 15:28:43 +0100 |
| Subject: [PATCH 4/6] TIFFFetchNormalTag(): avoid calling memcpy() with a null |
| source pointer and size of zero (fixes #383) |
| |
| --- |
| libtiff/tif_dirread.c | 5 ++++- |
| 1 file changed, 4 insertions(+), 1 deletion(-) |
| |
| diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c |
| index d84147a0..4e8ce729 100644 |
| --- a/libtiff/tif_dirread.c |
| +++ b/libtiff/tif_dirread.c |
| @@ -5079,7 +5079,10 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp, int recover) |
| _TIFFfree(data); |
| return(0); |
| } |
| - _TIFFmemcpy(o,data,(uint32_t)dp->tdir_count); |
| + if (dp->tdir_count > 0 ) |
| + { |
| + _TIFFmemcpy(o,data,(uint32_t)dp->tdir_count); |
| + } |
| o[(uint32_t)dp->tdir_count]=0; |
| if (data!=0) |
| _TIFFfree(data); |
| -- |
| 2.25.1 |
| |