Accepting request 289547 from home:adrianSuSE:branches:Archiving
fixing OBS-URL: https://build.opensuse.org/request/show/289547 OBS-URL: https://build.opensuse.org/package/show/Archiving/libarchive?expand=0&rev=38
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directory-traversal-fix.patch
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136
directory-traversal-fix.patch
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commit 59357157706d47c365b2227739e17daba3607526
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Author: Alessandro Ghedini <alessandro@ghedini.me>
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Date: Sun Mar 1 12:07:45 2015 +0100
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Add ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS option
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This fixes a directory traversal in the cpio tool.
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Index: libarchive-3.1.2/cpio/bsdcpio.1
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===================================================================
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--- libarchive-3.1.2.orig/cpio/bsdcpio.1
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+++ libarchive-3.1.2/cpio/bsdcpio.1
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@@ -156,7 +156,8 @@ See above for description.
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.It Fl Fl insecure
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(i and p mode only)
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Disable security checks during extraction or copying.
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-This allows extraction via symbolic links and path names containing
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+This allows extraction via symbolic links, absolute paths,
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+and path names containing
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.Sq ..
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in the name.
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.It Fl J , Fl Fl xz
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Index: libarchive-3.1.2/cpio/cpio.c
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===================================================================
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--- libarchive-3.1.2.orig/cpio/cpio.c
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+++ libarchive-3.1.2/cpio/cpio.c
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@@ -179,6 +179,7 @@ main(int argc, char *argv[])
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cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
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cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
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cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
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+ cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
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cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
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cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
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cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
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@@ -264,6 +265,7 @@ main(int argc, char *argv[])
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case OPTION_INSECURE:
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
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cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
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+ cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
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break;
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case 'L': /* GNU cpio */
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cpio->option_follow_links = 1;
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Index: libarchive-3.1.2/libarchive/archive.h
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===================================================================
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--- libarchive-3.1.2.orig/libarchive/archive.h
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+++ libarchive-3.1.2/libarchive/archive.h
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@@ -562,6 +562,8 @@ __LA_DECL int archive_read_set_options(s
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/* Default: Do not use HFS+ compression if it was not compressed. */
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/* This has no effect except on Mac OS v10.6 or later. */
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#define ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED (0x8000)
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+/* Default: Do not reject entries with absolute paths */
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+#define ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS (0x10000)
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__LA_DECL int archive_read_extract(struct archive *, struct archive_entry *,
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int flags);
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Index: libarchive-3.1.2/libarchive/archive_write_disk.3
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===================================================================
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--- libarchive-3.1.2.orig/libarchive/archive_write_disk.3
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+++ libarchive-3.1.2/libarchive/archive_write_disk.3
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@@ -177,6 +177,9 @@ The default is to not refuse such paths.
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Note that paths ending in
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.Pa ..
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always cause an error, regardless of this flag.
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+.It Cm ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS
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+Refuse to extract an absolute path.
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+The default is to not refuse such paths.
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.It Cm ARCHIVE_EXTRACT_SPARSE
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Scan data for blocks of NUL bytes and try to recreate them with holes.
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This results in sparse files, independent of whether the archive format
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Index: libarchive-3.1.2/libarchive/archive_write_disk_posix.c
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===================================================================
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--- libarchive-3.1.2.orig/libarchive/archive_write_disk_posix.c
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+++ libarchive-3.1.2/libarchive/archive_write_disk_posix.c
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@@ -2504,8 +2504,9 @@ cleanup_pathname_win(struct archive_writ
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/*
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* Canonicalize the pathname. In particular, this strips duplicate
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* '/' characters, '.' elements, and trailing '/'. It also raises an
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- * error for an empty path, a trailing '..' or (if _SECURE_NODOTDOT is
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- * set) any '..' in the path.
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+ * error for an empty path, a trailing '..', (if _SECURE_NODOTDOT is
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+ * set) any '..' in the path or (if ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS
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+ * is set) if the path is absolute.
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*/
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static int
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cleanup_pathname(struct archive_write_disk *a)
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@@ -2524,8 +2525,15 @@ cleanup_pathname(struct archive_write_di
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cleanup_pathname_win(a);
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#endif
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/* Skip leading '/'. */
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- if (*src == '/')
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+ if (*src == '/') {
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+ if (a->flags & ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS) {
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+ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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+ "Path is absolute");
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+ return (ARCHIVE_FAILED);
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+ }
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+
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separator = *src++;
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+ }
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/* Scan the pathname one element at a time. */
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for (;;) {
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Index: libarchive-3.1.2/libarchive/test/test_write_disk_secure.c
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===================================================================
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--- libarchive-3.1.2.orig/libarchive/test/test_write_disk_secure.c
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+++ libarchive-3.1.2/libarchive/test/test_write_disk_secure.c
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@@ -178,6 +178,29 @@ DEFINE_TEST(test_write_disk_secure)
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assert(S_ISDIR(st.st_mode));
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archive_entry_free(ae);
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+ /*
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+ * Without security checks, we should be able to
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+ * extract an absolute path.
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+ */
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+ assert((ae = archive_entry_new()) != NULL);
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+ archive_entry_copy_pathname(ae, "/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
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+ archive_entry_set_mode(ae, S_IFREG | 0777);
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+ assert(0 == archive_write_header(a, ae));
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+ assert(0 == archive_write_finish_entry(a));
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+ assertFileExists("/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
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+ assert(0 == unlink("/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp"));
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+
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+ /* But with security checks enabled, this should fail. */
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+ assert(archive_entry_clear(ae) != NULL);
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+ archive_entry_copy_pathname(ae, "/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
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+ archive_entry_set_mode(ae, S_IFREG | 0777);
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+ archive_write_disk_set_options(a, ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS);
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+ failure("Extracting an absolute path should fail here.");
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+ assertEqualInt(ARCHIVE_FAILED, archive_write_header(a, ae));
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+ archive_entry_free(ae);
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+ assert(0 == archive_write_finish_entry(a));
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+ assertFileNotExists("/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
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+
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assertEqualInt(ARCHIVE_OK, archive_write_free(a));
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/* Test the entries on disk. */
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@ -1,3 +1,8 @@
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-------------------------------------------------------------------
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Thu Mar 5 13:36:09 UTC 2015 - adrian@suse.com
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- fix a directory traversal in cpio tool (bnc#920870)
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-------------------------------------------------------------------
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Tue Nov 11 12:07:46 UTC 2014 - jsegitz@novell.com
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@ -1,7 +1,7 @@
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#
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# spec file for package libarchive
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#
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# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
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# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
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#
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# All modifications and additions to the file contributed by third parties
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# remain the property of their copyright owners, unless otherwise agreed
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@ -57,6 +57,7 @@ BuildRequires: zlib-devel
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Patch0: libarchive-openssl.patch
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Patch1: libarchive-xattr.patch
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Patch2: CVE-2013-0211.patch
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Patch3: directory-traversal-fix.patch
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%description
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Libarchive is a programming library that can create and read several
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@ -167,6 +168,8 @@ static library for libarchive
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%endif
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%patch1 -p1
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%patch2 -p1
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%patch3 -p1
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%build
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autoreconf -fiv
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%global optflags %{optflags} -D_REENTRANT -pipe
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