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SUSE:SLE-12-SP1:GA
libarchive.3431
CVE-2016-7166.patch
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File CVE-2016-7166.patch of Package libarchive.3431
commit 6e06b1c89dd0d16f74894eac4cfc1327a06ee4a0 Author: Tim Kientzle <kientzle@acm.org> Date: Sat Jan 10 12:24:58 2015 -0800 Fix a potential crash issue discovered by Alexander Cherepanov: It seems bsdtar automatically handles stacked compression. This is a nice feature but it could be problematic when it's completely unlimited. Most clearly it's illustrated with quines: $ curl -sRO http://www.maximumcompression.com/selfgz.gz $ (ulimit -v 10000000 && bsdtar -tvf selfgz.gz) bsdtar: Error opening archive: Can't allocate data for gzip decompression Without ulimit, bsdtar will eat all available memory. This could also be a problem for other applications using libarchive. Index: libarchive-3.1.2/Makefile.am =================================================================== --- libarchive-3.1.2.orig/Makefile.am +++ libarchive-3.1.2/Makefile.am @@ -439,6 +439,7 @@ libarchive_test_SOURCES= \ libarchive/test/test_read_pax_truncated.c \ libarchive/test/test_read_position.c \ libarchive/test/test_read_set_format.c \ + libarchive/test/test_read_too_many_filters.c \ libarchive/test/test_read_truncated.c \ libarchive/test/test_read_truncated_filter.c \ libarchive/test/test_sparse_basic.c \ @@ -703,6 +704,7 @@ libarchive_test_EXTRA_DIST=\ libarchive/test/test_read_splitted_rar_ab.uu \ libarchive/test/test_read_splitted_rar_ac.uu \ libarchive/test/test_read_splitted_rar_ad.uu \ + libarchive/test/test_read_too_many_filters.gz.uu \ libarchive/test/test_splitted_rar_seek_support_aa.uu \ libarchive/test/test_splitted_rar_seek_support_ab.uu \ libarchive/test/test_splitted_rar_seek_support_ac.uu \ Index: libarchive-3.1.2/libarchive/archive_read.c =================================================================== --- libarchive-3.1.2.orig/libarchive/archive_read.c +++ libarchive-3.1.2/libarchive/archive_read.c @@ -544,13 +544,13 @@ archive_read_open1(struct archive *_a) static int choose_filters(struct archive_read *a) { - int number_bidders, i, bid, best_bid; + int number_bidders, i, bid, best_bid, n; struct archive_read_filter_bidder *bidder, *best_bidder; struct archive_read_filter *filter; ssize_t avail; int r; - for (;;) { + for (n = 0; n < 25; ++n) { number_bidders = sizeof(a->bidders) / sizeof(a->bidders[0]); best_bid = 0; @@ -596,6 +596,9 @@ choose_filters(struct archive_read *a) return (ARCHIVE_FATAL); } } + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Input requires too many filters for decoding"); + return (ARCHIVE_FATAL); } /* Index: libarchive-3.1.2/libarchive/test/CMakeLists.txt =================================================================== --- libarchive-3.1.2.orig/libarchive/test/CMakeLists.txt +++ libarchive-3.1.2/libarchive/test/CMakeLists.txt @@ -150,6 +150,7 @@ IF(ENABLE_TEST) test_read_pax_truncated.c test_read_position.c test_read_set_format.c + test_read_too_many_filters.c test_read_truncated.c test_read_truncated_filter.c test_sparse_basic.c Index: libarchive-3.1.2/libarchive/test/test_read_too_many_filters.c =================================================================== --- /dev/null +++ libarchive-3.1.2/libarchive/test/test_read_too_many_filters.c @@ -0,0 +1,45 @@ +/*- + * Copyright (c) 2003-2008,2015 Tim Kientzle + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include "test.h" + +DEFINE_TEST(test_read_too_many_filters) +{ + const char *name = "test_read_too_many_filters.gz"; + struct archive *a; + int r; + + assert((a = archive_read_new()) != NULL); + r = archive_read_support_filter_gzip(a); + if (r == ARCHIVE_WARN) { + skipping("gzip reading not fully supported on this platform"); + } + assertEqualIntA(a, ARCHIVE_OK, archive_read_support_format_all(a)); + extract_reference_file(name); + assertEqualIntA(a, ARCHIVE_FATAL, + archive_read_open_filename(a, name, 200)); + + assertEqualInt(ARCHIVE_OK, archive_read_close(a)); + assertEqualInt(ARCHIVE_OK, archive_read_free(a)); +} Index: libarchive-3.1.2/libarchive/test/test_read_too_many_filters.gz.uu =================================================================== --- /dev/null +++ libarchive-3.1.2/libarchive/test/test_read_too_many_filters.gz.uu @@ -0,0 +1,15 @@ +This is a valid gzip file that decompresses to itself, from + http://www.maximumcompression.com/selfgz.gz + +This is used in test_read_too_many_filters to try to +crash libarchive by forcing it to spawn an unending +list of gunzip filters. + +begin 644 test_read_too_many_filters.gz +M'XL(`````````P`/`/#_'XL(`````````P`/`/#_````__\```#__X)QH5P` +M`!X`X?\```#__P```/__@G&A7```'@#A_P```/__````__\```#__P```/__ +M````__\```#__\(FAF`!`!0`Z_\```#__P```/__PB:&8`$`%`#K_\(FAF`! +M`!0`Z_^9(#6-B"@Q,C,T`K/`+```%`#K_P*SP"P``!0`Z_]"B"'$`````/__ +>`P!#2DTAT@```$*((<0`````__\#`$-*32'2```` +` +end
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