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From d81b82c70bc1fb9991bb95f1201abb5dea55f57f Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Mon, 17 Jul 2023 14:06:37 +0100
Subject: [PATCH] Bug 706897: Copy pcx buffer overrun fix from
devices/gdevpcx.c
Bounds check the buffer, before dereferencing the pointer.
Upstream-Status: Backport [https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=d81b82c70bc1fb9991bb95f1201abb5dea55f57f]
CVE: CVE-2023-38559
Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
---
base/gdevdevn.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/base/gdevdevn.c b/base/gdevdevn.c
index 3b019d6..2888776 100644
--- a/base/gdevdevn.c
+++ b/base/gdevdevn.c
@@ -1980,7 +1980,7 @@ devn_pcx_write_rle(const byte * from, const byte * end, int step, gp_file * file
byte data = *from;
from += step;
- if (data != *from || from == end) {
+ if (from >= end || data != *from) {
if (data >= 0xc0)
gp_fputc(0xc1, file);
} else {
--
2.25.1
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