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, 36 insertions, 0 deletions

diff --git a/meta/recipes-extended/ghostscript/ghostscript/CVE-2017-9216.patch b/meta/recipes-extended/ghostscript/ghostscript/CVE-2017-9216.patch
new file mode 100644
index 0000000000..1caeb3ef51
--- /dev/null
+++ b/meta/recipes-extended/ghostscript/ghostscript/CVE-2017-9216.patch
@@ -0,0 +1,36 @@
+From 3ebffb1d96ba0cacec23016eccb4047dab365853 Mon Sep 17 00:00:00 2001
+From: Shailesh Mistry <shailesh.mistry@hotmail.co.uk>
+Date: Wed, 24 May 2017 19:29:57 +0100
+Subject: [PATCH] Bug 697934: Fix SEGV due to error code being ignored.
+
+The return code from jbig2_decode_text_region was being ignored so the
+code continued to try and parse the invalid file using incomplete/empty
+structures.
+
+Upstream-Status: Backport
+CVE: CVE-2017-9216
+
+Signed-off-by: Catalin Enache <catalin.enache@windriver.com>
+---
+ jbig2dec/jbig2_symbol_dict.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/jbig2dec/jbig2_symbol_dict.c b/jbig2dec/jbig2_symbol_dict.c
+index 3cc1731..672425d 100644
+--- a/jbig2dec/jbig2_symbol_dict.c
++++ b/jbig2dec/jbig2_symbol_dict.c
+@@ -493,8 +493,10 @@ jbig2_decode_symbol_dict(Jbig2Ctx *ctx,
+                         }
+ 
+                         /* multiple symbols are handled as a text region */
+-                        jbig2_decode_text_region(ctx, segment, tparams, (const Jbig2SymbolDict * const *)refagg_dicts,
++                        code = jbig2_decode_text_region(ctx, segment, tparams, (const Jbig2SymbolDict * const *)refagg_dicts,
+                                                  n_refagg_dicts, image, data, size, GR_stats, as, ws);
++                        if (code < 0)
++                            goto cleanup4;
+ 
+                         SDNEWSYMS->glyphs[NSYMSDECODED] = image;
+                         refagg_dicts[0]->glyphs[params->SDNUMINSYMS + NSYMSDECODED] = jbig2_image_clone(ctx, SDNEWSYMS->glyphs[NSYMSDECODED]);
+-- 
+2.10.2
+