404156ec6d
- CVE-2017-7207.patch fixes a NULL pointer dereference in mem_get_bits_rectangle see https://bugs.ghostscript.com/show_bug.cgi?id=697676 (bsc#1030263) - CVE-2017-9216.patch fixes a NULL pointer dereference in jbig2_huffman_get see https://bugs.ghostscript.com/show_bug.cgi?id=697934 (bsc#1040643) OBS-URL: https://build.opensuse.org/request/show/501324 OBS-URL: https://build.opensuse.org/package/show/Printing/ghostscript?expand=0&rev=79
31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
From 309eca4e0a31ea70dcc844812691439312dad091 Mon Sep 17 00:00:00 2001
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From: Ken Sharp <ken.sharp@artifex.com>
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Date: Mon, 20 Mar 2017 09:34:11 +0000
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Subject: [PATCH] Ensure a device has raster memory, before trying to read it.
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Bug #697676 "Null pointer dereference in mem_get_bits_rectangle()"
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This is only possible by abusing/mis-using Ghostscript-specific
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language extensions, so cannot happen in a general PostScript program.
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Nevertheless, Ghostscript should not crash. So this commit checks the
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memory device to see if raster memory has been allocated, before trying
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to read from it.
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---
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base/gdevmem.c | 2 ++
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1 file changed, 2 insertions(+)
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Index: ghostscript-9.15/base/gdevmem.c
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===================================================================
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--- ghostscript-9.15.orig/base/gdevmem.c 2014-09-22 12:17:33.000000000 +0200
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+++ ghostscript-9.15/base/gdevmem.c 2017-04-28 10:55:17.479490151 +0200
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@@ -590,6 +590,8 @@ mem_get_bits_rectangle(gx_device * dev,
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GB_PACKING_CHUNKY | GB_COLORS_NATIVE | GB_ALPHA_NONE;
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return_error(gs_error_rangecheck);
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}
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+ if (mdev->line_ptrs == 0x00)
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+ return_error(gs_error_rangecheck);
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if ((w <= 0) | (h <= 0)) {
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if ((w | h) < 0)
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return_error(gs_error_rangecheck);
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