Fix CVE-2017-11110:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11110
https://bugzilla.redhat.com/show_bug.cgi?id=1468471
https://security-tracker.debian.org/tracker/CVE-2017-11110

Patch copied from openSUSE:

https://build.opensuse.org/package/view_file/openSUSE:Maintenance:6985/catdoc.openSUSE_Leap_42.2_Update/CVE-2017-11110.patch?expand=1

From: Andreas Stieger <astieger@suse.com>
Date: Mon, 10 Jul 2017 15:37:58 +0000
References: CVE-2017-11110 http://bugzilla.suse.com/show_bug.cgi?id=1047877

All .doc I found had sectorSize 0x09 at offset 0x1e. Guarding it against <4.

---
 src/ole.c |    5 +++++
 1 file changed, 5 insertions(+)

Index: catdoc-0.95/src/ole.c
===================================================================
--- catdoc-0.95.orig/src/ole.c	2016-05-25 06:37:12.000000000 +0200
+++ catdoc-0.95/src/ole.c	2017-07-10 17:42:33.578308107 +0200
@@ -106,6 +106,11 @@ FILE* ole_init(FILE *f, void *buffer, si
 		return NULL;
 	}
  	sectorSize = 1<<getshort(oleBuf,0x1e);
+	/* CVE-2017-11110) */
+ 	if (sectorSize < 4) {
+		fprintf(stderr,"sectorSize < 4 not supported\n");
+		return NULL;
+	}
 	shortSectorSize=1<<getshort(oleBuf,0x20);
 
 /* Read BBD into memory */
@@ -147,7 +152,7 @@ FILE* ole_init(FILE *f, void *buffer, si
 		}
 
 		fseek(newfile, 512+mblock*sectorSize, SEEK_SET);
-		if(fread(tmpBuf+MSAT_ORIG_SIZE+(sectorSize-4)*i,
+		if(fread(tmpBuf+MSAT_ORIG_SIZE+(sectorSize-4)*i, /* >= 4 for CVE-2017-11110 */
 						 1, sectorSize, newfile) != sectorSize) {
 			fprintf(stderr, "Error read MSAT!\n");
 			ole_finish();
ight' method='get' action='/guix/log/gnu/packages/enchant.scm'>
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<tr><td><span title='2018-09-26 00:33:01 +0200'>2018-09-26</span></td><td><a href='/guix/commit/gnu/packages/enchant.scm?id=c1d59b3c2a88427aa268a405116a01958db84a5b'>gnu: enchant: Update to 2.2.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/enchant.scm (enchant): Update to 2.2.3.
[arguments]: Add "--enable-relocatable" to #:configure-flags.
[native-inputs]: Add UNITTEST-CPP.
(enchant-1.6): New public variable.
* gnu/packages/fcitx.scm (fcitx)[inputs]: Change ENCHANT to ENCHANT-1.6.
* gnu/packages/gnome.scm (gspell): Likewise.
* gnu/packages/mate.scm (pluma): Likewise.
* gnu/packages/gtk.scm (gtkspell3)[propagated-inputs]: Likewise.
[inputs]: Remove duplicate ENCHANT.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-09-26 00:33:01 +0200'>2018-09-26</span></td><td><a href='/guix/commit/gnu/packages/enchant.scm?id=9a59b29411e2f007a6ba32b88d3b6f50bd6c1f45'>gnu: enchant: Propagate Glib.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/enchant.scm (enchant)[inputs]: Move GLIB ...
[propagated-inputs]: ... here.  New field.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-09-26 00:33:01 +0200'>2018-09-26</span></td><td><a href='/guix/commit/gnu/packages/enchant.scm?id=18ef85b64a3433bccf8dc8b32d338de91fd85a8a'>gnu: enchant: Don't build libenchant.a.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/enchant.scm (enchant)[arguments]: Add #:configure-flags.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2018-09-26 00:33:00 +0200'>2018-09-26</span></td><td><a href='/guix/commit/gnu/packages/enchant.scm?id=52b87855ea64f02a254f6b510346dfb0e20dd5a7'>gnu: enchant: Update home page.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/enchant.scm (enchant)[home-page]: Set to URL mentioned on the
legacy home page.
</span></span></td><td>Marius Bakke</td></tr>