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>

1 files changed, 33 insertions, 0 deletions

diff --git a/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-7977.patch b/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-7977.patch
new file mode 100644
index 0000000000..b7eed1241e
--- /dev/null
+++ b/meta/recipes-extended/ghostscript/ghostscript/CVE-2016-7977.patch
@@ -0,0 +1,33 @@
+From 8abd22010eb4db0fb1b10e430d5f5d83e015ef70 Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Mon, 3 Oct 2016 01:46:28 +0100
+Subject: [PATCH] Bug 697169: Be rigorous with SAFER permissions
+
+Once we've opened our input file from the command line, enforce the SAFER
+rules.
+
+Upstream-Status: Backport
+CVE: CVE-2016-7977
+
+Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
+---
+ psi/zfile.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/psi/zfile.c b/psi/zfile.c
+index b6caea2..2c6c958 100644
+--- a/psi/zfile.c
++++ b/psi/zfile.c
+@@ -1081,6 +1081,9 @@ lib_file_open(gs_file_path_ptr  lib_path, const gs_memory_t *mem, i_ctx_t *i_ctx
+     gs_main_instance *minst = get_minst_from_memory(mem);
+     int code;
+ 
++    if (i_ctx_p && starting_arg_file)
++        i_ctx_p->starting_arg_file = false;
++
+     /* when starting arg files (@ files) iodev_default is not yet set */
+     if (iodev == 0)
+         iodev = (gx_io_device *)gx_io_device_table[0];
+-- 
+2.10.2
+