29 lines
1006 B
Diff
29 lines
1006 B
Diff
From 98b2e94e62d873acbcc6d968f1f97af9749fe021 Mon Sep 17 00:00:00 2001
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From: Ondrej Dubaj <odubaj@redhat.com>
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Date: Tue, 4 Jun 2019 10:54:45 +0200
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Subject: [PATCH] heap based buffer overflow in
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gd_color_match.c:gdImageColorMatch() in libgd as used in imagecolormatch()
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---
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src/gd_color_match.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/src/gd_color_match.c b/src/gd_color_match.c
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index f0842b6..a94a841 100755
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--- a/src/gd_color_match.c
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+++ b/src/gd_color_match.c
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@@ -31,8 +31,8 @@ BGD_DECLARE(int) gdImageColorMatch (gdImagePtr im1, gdImagePtr im2)
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return -4; /* At least 1 color must be allocated */
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}
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- buf = (unsigned long *)gdMalloc(sizeof(unsigned long) * 5 * im2->colorsTotal);
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- memset (buf, 0, sizeof(unsigned long) * 5 * im2->colorsTotal );
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+ buf = (unsigned long *)gdMalloc(sizeof(unsigned long) * 5 * gdMaxColors);
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+ memset (buf, 0, sizeof(unsigned long) * 5 * gdMaxColors );
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for (x=0; x < im1->sx; x++) {
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for( y=0; y<im1->sy; y++ ) {
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--
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2.17.1
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