mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-26 06:18:07 -05:00
10cb88f85c
* gnu/packages/patches/jbig2dec-CVE-2017-7885.patch, gnu/packages/patches/jbig2dec-CVE-2017-7975.patch, gnu/packages/patches/jbig2dec-CVE-2017-7976.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/image.scm (jbig2dec)[source]: Use them.
38 lines
1.5 KiB
Diff
38 lines
1.5 KiB
Diff
Fix CVE-2017-7885:
|
|
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7885
|
|
https://bugs.ghostscript.com/show_bug.cgi?id=697703
|
|
|
|
Patch copied from upstream source repository:
|
|
|
|
https://git.ghostscript.com/?p=jbig2dec.git;a=commit;h=258290340bb657c9efb44457f717b0d8b49f4aa3
|
|
|
|
From 258290340bb657c9efb44457f717b0d8b49f4aa3 Mon Sep 17 00:00:00 2001
|
|
From: Shailesh Mistry <shailesh.mistry@hotmail.co.uk>
|
|
Date: Wed, 3 May 2017 22:06:01 +0100
|
|
Subject: [PATCH] Bug 697703: Prevent integer overflow vulnerability.
|
|
|
|
Add extra check for the offset being greater than the size
|
|
of the image and hence reading off the end of the buffer.
|
|
|
|
Thank you to Dai Ge for finding this issue and suggesting a patch.
|
|
---
|
|
jbig2_symbol_dict.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
diff --git a/jbig2_symbol_dict.c b/jbig2_symbol_dict.c
|
|
index 4acaba9..36225cb 100644
|
|
--- a/jbig2_symbol_dict.c
|
|
+++ b/jbig2_symbol_dict.c
|
|
@@ -629,7 +629,7 @@ jbig2_decode_symbol_dict(Jbig2Ctx *ctx,
|
|
byte *dst = image->data;
|
|
|
|
/* SumatraPDF: prevent read access violation */
|
|
- if (size - jbig2_huffman_offset(hs) < image->height * stride) {
|
|
+ if ((size - jbig2_huffman_offset(hs) < image->height * stride) || (size < jbig2_huffman_offset(hs))) {
|
|
jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "not enough data for decoding (%d/%d)", image->height * stride,
|
|
size - jbig2_huffman_offset(hs));
|
|
jbig2_image_release(ctx, image);
|
|
--
|
|
2.13.0
|
|
|