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();
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<tr><td><span title='2024-03-11 14:34:25 -0700'>2024-03-11</span></td><td><a href='/guix/commit/etc/guix-daemon.service.in?id=5f100c68a4a8ef9ed5599bb99c910018869bc6f3'>etc: systemd services: switch to "journal" for output and error logging.</a><span class='msg-avail'>...</span></td><td>Vagrant Cascadian</td></tr>
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<tr><td><span title='2022-12-14 20:55:04 +0100'>2022-12-14</span></td><td><a href='/guix/commit/gnu/services/ldap.scm?id=c6f81ff7a6a527b5a14189a2c359b981ddba43bc'>gnu: Add directory-server-service-type.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>