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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) (From OE-Core rev: 6fed7cd6077c46ad2213226d4675fad9b10ab024) Signed-off-by: Catalin Enache <catalin.enache@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
34 lines
1002 B
Diff
34 lines
1002 B
Diff
From 8abd22010eb4db0fb1b10e430d5f5d83e015ef70 Mon Sep 17 00:00:00 2001
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From: Chris Liddell <chris.liddell@artifex.com>
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Date: Mon, 3 Oct 2016 01:46:28 +0100
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Subject: [PATCH] Bug 697169: Be rigorous with SAFER permissions
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Once we've opened our input file from the command line, enforce the SAFER
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rules.
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Upstream-Status: Backport
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CVE: CVE-2016-7977
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Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
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---
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psi/zfile.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/psi/zfile.c b/psi/zfile.c
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index b6caea2..2c6c958 100644
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--- a/psi/zfile.c
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+++ b/psi/zfile.c
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@@ -1081,6 +1081,9 @@ lib_file_open(gs_file_path_ptr lib_path, const gs_memory_t *mem, i_ctx_t *i_ctx
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gs_main_instance *minst = get_minst_from_memory(mem);
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int code;
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+ if (i_ctx_p && starting_arg_file)
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+ i_ctx_p->starting_arg_file = false;
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+
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/* when starting arg files (@ files) iodev_default is not yet set */
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if (iodev == 0)
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iodev = (gx_io_device *)gx_io_device_table[0];
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--
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2.10.2
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