unzip: patch CVE-2014-9913 and CVE-2016-9844 vulnerabilities

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

utils/unzip/Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006-2015 OpenWrt.org
+# Copyright (C) 2006-2017 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=unzip
 PKG_REV:=60
 PKG_VERSION:=6.0
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE:=$(PKG_NAME)$(PKG_REV).tar.gz
 PKG_SOURCE_URL:=@SF/infozip

utils/unzip/patches/008-cve-2014-9913-unzip-buffer-overflow.patch

@@ -0,0 +1,29 @@
+From: "Steven M. Schweda" <sms@antinode.info>
+Subject: Fix CVE-2014-9913, buffer overflow in unzip
+Bug: https://sourceforge.net/p/infozip/bugs/27/
+Bug-Debian: https://bugs.debian.org/847485
+Bug-Ubuntu: https://launchpad.net/bugs/387350
+X-Debian-version: 6.0-21
+
+--- a/list.c
++++ b/list.c
+@@ -339,7 +339,18 @@ int list_files(__G)    /* return PK-type
+                 G.crec.compression_method == ENHDEFLATED) {
+                 methbuf[5] = dtype[(G.crec.general_purpose_bit_flag>>1) & 3];
+             } else if (methnum >= NUM_METHODS) {
+-                sprintf(&methbuf[4], "%03u", G.crec.compression_method);
++                /* 2013-02-26 SMS.
++                 * http://sourceforge.net/p/infozip/bugs/27/  CVE-2014-9913.
++                 * Unexpectedly large compression methods overflow
++                 * &methbuf[].  Use the old, three-digit decimal format
++                 * for values which fit.  Otherwise, sacrifice the
++                 * colon, and use four-digit hexadecimal.
++                 */
++                if (G.crec.compression_method <= 999) {
++                    sprintf( &methbuf[ 4], "%03u", G.crec.compression_method);
++                } else {
++                    sprintf( &methbuf[ 3], "%04X", G.crec.compression_method);
++                }
+             }
+ 
+ #if 0       /* GRR/Euro:  add this? */

utils/unzip/patches/009-cve-2016-9844-zipinfo-buffer-overflow.patch

@@ -0,0 +1,28 @@
+From: "Steven M. Schweda" <sms@antinode.info>
+Subject: Fix CVE-2016-9844, buffer overflow in zipinfo
+Bug-Debian: https://bugs.debian.org/847486
+Bug-Ubuntu: https://launchpad.net/bugs/1643750
+X-Debian-version: 6.0-21
+
+--- a/zipinfo.c
++++ b/zipinfo.c
+@@ -1921,7 +1921,18 @@ static int zi_short(__G)   /* return PK-
+         ush  dnum=(ush)((G.crec.general_purpose_bit_flag>>1) & 3);
+         methbuf[3] = dtype[dnum];
+     } else if (methnum >= NUM_METHODS) {   /* unknown */
+-        sprintf(&methbuf[1], "%03u", G.crec.compression_method);
++        /* 2016-12-05 SMS.
++         * https://launchpad.net/bugs/1643750
++         * Unexpectedly large compression methods overflow
++         * &methbuf[].  Use the old, three-digit decimal format
++         * for values which fit.  Otherwise, sacrifice the "u",
++         * and use four-digit hexadecimal.
++         */
++        if (G.crec.compression_method <= 999) {
++            sprintf( &methbuf[ 1], "%03u", G.crec.compression_method);
++        } else {
++            sprintf( &methbuf[ 0], "%04X", G.crec.compression_method);
++        }
+     }
+ 
+     for (k = 0;  k < 15;  ++k)