diff options
Diffstat (limited to 'main/ghostscript/CVE-2017-7207.patch')
| -rw-r--r-- | main/ghostscript/CVE-2017-7207.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/main/ghostscript/CVE-2017-7207.patch b/main/ghostscript/CVE-2017-7207.patch new file mode 100644 index 0000000000..0cfa5942be --- /dev/null +++ b/main/ghostscript/CVE-2017-7207.patch @@ -0,0 +1,33 @@ +From 309eca4e0a31ea70dcc844812691439312dad091 Mon Sep 17 00:00:00 2001 +From: Ken Sharp <ken.sharp@artifex.com> +Date: Mon, 20 Mar 2017 09:34:11 +0000 +Subject: [PATCH] Ensure a device has raster memory, before trying to read it. + +Bug #697676 "Null pointer dereference in mem_get_bits_rectangle()" + +This is only possible by abusing/mis-using Ghostscript-specific +language extensions, so cannot happen in a general PostScript program. + +Nevertheless, Ghostscript should not crash. So this commit checks the +memory device to see if raster memory has been allocated, before trying +to read from it. +--- + base/gdevmem.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/base/gdevmem.c b/base/gdevmem.c +index afd05bd..d52d684 100644 +--- a/base/gdevmem.c ++++ b/base/gdevmem.c +@@ -606,6 +606,8 @@ mem_get_bits_rectangle(gx_device * dev, const gs_int_rect * prect, + GB_PACKING_CHUNKY | GB_COLORS_NATIVE | GB_ALPHA_NONE; + return_error(gs_error_rangecheck); + } ++ if (mdev->line_ptrs == 0x00) ++ return_error(gs_error_rangecheck); + if ((w <= 0) | (h <= 0)) { + if ((w | h) < 0) + return_error(gs_error_rangecheck); +-- +2.9.1 + |