ghostscript: CVE-2016-7977, CVE-2016-7978, CVE-2016-7979, CVE-2017-9216
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>
This commit is contained in:
Catalin Enache
Richard Purdie
parent
31e9be1981
commit
30a1a8e448
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@ -0,0 +1,33 @@
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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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@ -0,0 +1,30 @@
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From 6f749c0c44e7b9e09737b9f29edf29925a34f0cf Mon Sep 17 00:00:00 2001
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From: Chris Liddell <chris.liddell@artifex.com>
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Date: Wed, 5 Oct 2016 09:59:25 +0100
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Subject: [PATCH] Bug 697179: Reference count device icc profile
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when copying a device
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Upstream-Status: Backport
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CVE: CVE-2016-7978
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Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
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---
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base/gsdevice.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/base/gsdevice.c b/base/gsdevice.c
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index 778106f..aea986a 100644
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--- a/base/gsdevice.c
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+++ b/base/gsdevice.c
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@@ -614,6 +614,7 @@ gx_device_init(gx_device * dev, const gx_device * proto, gs_memory_t * mem,
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dev->memory = mem;
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dev->retained = !internal;
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rc_init(dev, mem, (internal ? 0 : 1));
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+ rc_increment(dev->icc_struct);
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}
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void
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--
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2.10.2
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@ -0,0 +1,48 @@
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From 875a0095f37626a721c7ff57d606a0f95af03913 Mon Sep 17 00:00:00 2001
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From: Ken Sharp <ken.sharp@artifex.com>
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Date: Wed, 5 Oct 2016 10:10:58 +0100
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Subject: [PATCH] DSC parser - validate parameters
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Bug #697190 ".initialize_dsc_parser doesn't validate the parameter is a dict type before using it."
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Regardless of any security implications, its simply wrong for a PostScript
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operator not to validate its parameter(s).
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No differences expected.
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Upstream-Status: Backport
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CVE: CVE-2016-7979
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Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
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---
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psi/zdscpars.c | 13 +++++++++----
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1 file changed, 9 insertions(+), 4 deletions(-)
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diff --git a/psi/zdscpars.c b/psi/zdscpars.c
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index c05e154..9b4b605 100644
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--- a/psi/zdscpars.c
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+++ b/psi/zdscpars.c
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@@ -150,11 +150,16 @@ zinitialize_dsc_parser(i_ctx_t *i_ctx_p)
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ref local_ref;
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int code;
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os_ptr const op = osp;
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- dict * const pdict = op->value.pdict;
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- gs_memory_t * const mem = (gs_memory_t *)dict_memory(pdict);
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- dsc_data_t * const data =
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- gs_alloc_struct(mem, dsc_data_t, &st_dsc_data_t, "DSC parser init");
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+ dict *pdict;
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+ gs_memory_t *mem;
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+ dsc_data_t *data;
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+ check_read_type(*op, t_dictionary);
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+
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+ pdict = op->value.pdict;
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+ mem = (gs_memory_t *)dict_memory(pdict);
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+
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+ data = gs_alloc_struct(mem, dsc_data_t, &st_dsc_data_t, "DSC parser init");
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if (!data)
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return_error(gs_error_VMerror);
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data->document_level = 0;
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--
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2.10.2
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@ -0,0 +1,36 @@
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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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@ -37,6 +37,10 @@ SRC_URI = "${SRC_URI_BASE} \
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file://CVE-2017-5951.patch \
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file://CVE-2016-8602.patch \
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file://CVE-2017-7975.patch \
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file://CVE-2016-7977.patch \
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file://CVE-2016-7978.patch \
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file://CVE-2016-7979.patch \
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file://CVE-2017-9216.patch \
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"
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SRC_URI_class-native = "${SRC_URI_BASE} \
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