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Ghostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently read arbitrary files via the use of the .libfile operator in a crafted postscript document. Use-after-free vulnerability in Ghostscript 9.20 might allow remote attackers to execute arbitrary code via vectors related to a reference leak in .setdevice. Ghostscript before 9.21 might allow remote attackers to bypass the SAFER mode protection mechanism and consequently execute arbitrary code by leveraging type confusion in .initialize_dsc_parser. libjbig2dec.a in Artifex jbig2dec 0.13, as used in MuPDF and Ghostscript, has a NULL pointer dereference in the jbig2_huffman_get function in jbig2_huffman.c. For example, the jbig2dec utility will crash (segmentation fault) when parsing an invalid file. References: https://nvd.nist.gov/vuln/detail/CVE-2016-7977 https://nvd.nist.gov/vuln/detail/CVE-2016-7978 https://nvd.nist.gov/vuln/detail/CVE-2016-7979 https://nvd.nist.gov/vuln/detail/CVE-2017-9216 Upstream patches: http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=8abd22010eb4db0fb1b10e430d5f5d83e015ef70 http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=6f749c0c44e7b9e09737b9f29edf29925a34f0cf http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=875a0095f37626a721c7ff57d606a0f95af03913 http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=3ebffb1d96ba0cacec23016eccb4047dab365853 (From OE-Core rev: 584dfa2f780d5785aaff01f84fbabc18b3478d76) Signed-off-by: Catalin Enache <catalin.enache@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
37 lines
1.6 KiB
Diff
37 lines
1.6 KiB
Diff
From 3ebffb1d96ba0cacec23016eccb4047dab365853 Mon Sep 17 00:00:00 2001
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From: Shailesh Mistry <shailesh.mistry@hotmail.co.uk>
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Date: Wed, 24 May 2017 19:29:57 +0100
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Subject: [PATCH] Bug 697934: Fix SEGV due to error code being ignored.
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The return code from jbig2_decode_text_region was being ignored so the
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code continued to try and parse the invalid file using incomplete/empty
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structures.
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Upstream-Status: Backport
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CVE: CVE-2017-9216
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Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
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---
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jbig2dec/jbig2_symbol_dict.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/jbig2dec/jbig2_symbol_dict.c b/jbig2dec/jbig2_symbol_dict.c
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index 3cc1731..672425d 100644
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--- a/jbig2dec/jbig2_symbol_dict.c
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+++ b/jbig2dec/jbig2_symbol_dict.c
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@@ -493,8 +493,10 @@ jbig2_decode_symbol_dict(Jbig2Ctx *ctx,
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}
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/* multiple symbols are handled as a text region */
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- jbig2_decode_text_region(ctx, segment, tparams, (const Jbig2SymbolDict * const *)refagg_dicts,
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+ code = jbig2_decode_text_region(ctx, segment, tparams, (const Jbig2SymbolDict * const *)refagg_dicts,
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n_refagg_dicts, image, data, size, GR_stats, as, ws);
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+ if (code < 0)
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+ goto cleanup4;
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SDNEWSYMS->glyphs[NSYMSDECODED] = image;
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refagg_dicts[0]->glyphs[params->SDNUMINSYMS + NSYMSDECODED] = jbig2_image_clone(ctx, SDNEWSYMS->glyphs[NSYMSDECODED]);
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--
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2.10.2
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