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unzip: fix CVE-2018-18384.

This commit is contained in:
travankor 2019-12-26 06:50:22 -07:00 committed by Helmut Pozimski
parent 125f385aa0
commit fd9adfd49b
3 changed files with 40 additions and 30 deletions
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28
srcpkgs/unzip/patches/CVE-2014-9913.patch
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@ -1,28 +0,0 @@
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
--- list.c
+++ list.c
@@ -339,7 +339,18 @@
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? */

40
srcpkgs/unzip/patches/patch-list.c.diff
View File

@ -1,10 +1,32 @@
$NetBSD: patch-list.c,v 1.1 2015/01/06 14:12:45 wiz Exp $
$NetBSD: patch-list.c,v 1.3 2019/07/15 14:08:03 nia Exp $
chunk 1:
CVE-2018-18384 fix from
https://sourceforge.net/p/infozip/bugs/53/
and
https://sources.debian.org/patches/unzip/6.0-24/07-increase-size-of-cfactorstr.patch/
chunk 2:
Big-hammer fix for
http://seclists.org/oss-sec/2014/q4/497
chunk 3:
CVE-2014-9913 fix from
https://people.debian.org/~sanvila/unzip/cve-2014-9913/cve-2014-9913-unzip-buffer-overflow.txt
via
http://www.info-zip.org/phpBB3/viewtopic.php?f=7&t=529
--- list.c.orig 2009-02-08 17:11:34.000000000 +0000
+++ list.c
@@ -97,7 +97,7 @@ int list_files(__G) /* return PK-type
{
int do_this_file=FALSE, cfactor, error, error_in_archive=PK_COOL;
#ifndef WINDLL
- char sgn, cfactorstr[10];
+ char sgn, cfactorstr[12];
int longhdr=(uO.vflag>1);
#endif
int date_format;
@@ -116,7 +116,7 @@ int list_files(__G) /* return PK-type
ulg acl_size, tot_aclsize=0L, tot_aclfiles=0L;
#endif
@ -14,3 +36,19 @@ http://seclists.org/oss-sec/2014/q4/497
static ZCONST char dtype[]="NXFS"; /* see zi_short() */
static ZCONST char Far method[NUM_METHODS+1][8] =
{"Stored", "Shrunk", "Reduce1", "Reduce2", "Reduce3", "Reduce4",
@@ -339,7 +339,14 @@ 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);
+ /* Fix for CVE-2014-9913, similar to CVE-2016-9844.
+ * Use the old decimal format only for values which fit.
+ */
+ 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? */

2
srcpkgs/unzip/template
View File

@ -1,7 +1,7 @@
# Template file for 'unzip'
pkgname=unzip
version=6.0
revision=12
revision=13
wrksrc=unzip60
makedepends="bzip2-devel"
short_desc="List, test and extract compressed files in a ZIP archive"