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* gnu/packages/patches/imagemagick-CVE-2020-27829.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/imagemagick.scm (source): Add patch.
27 lines
1,010 B
Diff
27 lines
1,010 B
Diff
We omit the ChangeLog changes below, since they do not apply cleanly.
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From 6ee5059cd3ac8d82714a1ab1321399b88539abf0 Mon Sep 17 00:00:00 2001
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From: Cristy <urban-warrior@imagemagick.org>
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Date: Mon, 30 Nov 2020 16:26:59 +0000
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Subject: [PATCH] possible TIFF related-heap buffer overflow (alert & POC by
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Hardik Shah)
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---
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ChangeLog | 6 ++++++
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coders/tiff.c | 2 +-
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2 files changed, 7 insertions(+), 1 deletion(-)
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diff --git a/coders/tiff.c b/coders/tiff.c
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index e98f927ab..1eecf17ae 100644
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--- a/coders/tiff.c
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+++ b/coders/tiff.c
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@@ -1975,7 +1975,7 @@ static Image *ReadTIFFImage(const ImageInfo *image_info,
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extent+=image->columns*sizeof(uint32);
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#endif
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strip_pixels=(unsigned char *) AcquireQuantumMemory(extent,
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- sizeof(*strip_pixels));
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+ 2*sizeof(*strip_pixels));
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if (strip_pixels == (unsigned char *) NULL)
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ThrowTIFFException(ResourceLimitError,"MemoryAllocationFailed");
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(void) memset(strip_pixels,0,extent*sizeof(*strip_pixels));
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