diff options
Diffstat (limited to 'gnu/packages/patches/jbig2dec-CVE-2017-7885.patch')
| -rw-r--r-- | gnu/packages/patches/jbig2dec-CVE-2017-7885.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/gnu/packages/patches/jbig2dec-CVE-2017-7885.patch b/gnu/packages/patches/jbig2dec-CVE-2017-7885.patch new file mode 100644 index 0000000000..a598392765 --- /dev/null +++ b/gnu/packages/patches/jbig2dec-CVE-2017-7885.patch @@ -0,0 +1,38 @@ +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 + |