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From 4746f16253b784287bc8a5003990c1c3b9a03a62 Mon Sep 17 00:00:00 2001
From: Su_Laus <sulau@freenet.de>
Date: Thu, 25 Aug 2022 16:11:41 +0200
Subject: [PATCH] tiffcrop: disable incompatibility of -Z, -X, -Y, -z options
with any PAGE_MODE_x option (fixes #411 and #413)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
tiffcrop does not support –Z, -z, -X and –Y options together with any other PAGE_MODE_x options like -H, -V, -P, -J, -K or –S.
Code analysis:
With the options –Z, -z, the crop.selections are set to a value > 0. Within main(), this triggers the call of processCropSelections(), which copies the sections from the read_buff into seg_buffs[].
In the following code in main(), the only supported step, where that seg_buffs are further handled are within an if-clause with if (page.mode == PAGE_MODE_NONE) .
Execution of the else-clause often leads to buffer-overflows.
Therefore, the above option combination is not supported and will be disabled to prevent those buffer-overflows.
The MR solves issues #411 and #413.
CVE: CVE-2022-3597 CVE-2022-3626 CVE-2022-3627
Upstream-Status: Backport
Signed-off-by: Ross Burton <ross.burton@arm.com>
---
doc/tools/tiffcrop.rst | 8 ++++++++
tools/tiffcrop.c | 32 +++++++++++++++++++++++++-------
2 files changed, 33 insertions(+), 7 deletions(-)
diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
index 8fd856dc..41a2ea36 100644
--- a/tools/tiffcrop.c
+++ b/tools/tiffcrop.c
@@ -2138,9 +2143,20 @@ void process_command_opts (int argc, char *argv[], char *mp, char *mode, uint32
R = (crop_data->crop_mode & CROP_REGIONS) ? 1 : 0;
S = (page->mode & PAGE_MODE_ROWSCOLS) ? 1 : 0;
if (XY + Z + R + S > 1) {
- TIFFError("tiffcrop input error", "The crop options(-X|-Y), -Z, -z and -S are mutually exclusive.->Exit");
+ TIFFError("tiffcrop input error", "The crop options(-X|-Y), -Z, -z and -S are mutually exclusive.->exit");
exit(EXIT_FAILURE);
}
+
+ /* Check for not allowed combination:
+ * Any of the -X, -Y, -Z and -z options together with other PAGE_MODE_x options
+ * such as -H, -V, -P, -J or -K are not supported and may cause buffer overflows.
+. */
+ if ((XY + Z + R > 0) && page->mode != PAGE_MODE_NONE) {
+ TIFFError("tiffcrop input error",
+ "Any of the crop options -X, -Y, -Z and -z together with other PAGE_MODE_x options such as - H, -V, -P, -J or -K is not supported and may cause buffer overflows..->exit");
+ exit(EXIT_FAILURE);
+ }
+
} /* end process_command_opts */
/* Start a new output file if one has not been previously opened or
--
2.34.1
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