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-rw-r--r--patches/libarchive-3.1.2.local.patch139
1 files changed, 139 insertions, 0 deletions
diff --git a/patches/libarchive-3.1.2.local.patch b/patches/libarchive-3.1.2.local.patch
new file mode 100644
index 00000000..746a4b70
--- /dev/null
+++ b/patches/libarchive-3.1.2.local.patch
@@ -0,0 +1,139 @@
+--- libarchive-3.1.2/cpio/bsdcpio.1.orig
++++ libarchive-3.1.2/cpio/bsdcpio.1
+@@ -156,7 +156,8 @@
+ .It Fl Fl insecure
+ (i and p mode only)
+ Disable security checks during extraction or copying.
+-This allows extraction via symbolic links and path names containing
++This allows extraction via symbolic links, absolute paths,
++and path names containing
+ .Sq ..
+ in the name.
+ .It Fl J , Fl Fl xz
+--- libarchive-3.1.2/cpio/cpio.c.orig
++++ libarchive-3.1.2/cpio/cpio.c
+@@ -179,6 +179,7 @@
+ cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
+ cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
+ cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
++ cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
+ cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
+ cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
+ cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
+@@ -264,6 +265,7 @@
+ case OPTION_INSECURE:
+ cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
+ cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
++ cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
+ break;
+ case 'L': /* GNU cpio */
+ cpio->option_follow_links = 1;
+@@ -300,6 +302,7 @@
+ "Cannot use both -p and -%c", cpio->mode);
+ cpio->mode = opt;
+ cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
++ cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
+ break;
+ case OPTION_PRESERVE_OWNER:
+ cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
+--- libarchive-3.1.2/libarchive/archive.h.orig
++++ libarchive-3.1.2/libarchive/archive.h
+@@ -562,6 +562,8 @@
+ /* Default: Do not use HFS+ compression if it was not compressed. */
+ /* This has no effect except on Mac OS v10.6 or later. */
+ #define ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED (0x8000)
++/* Default: Do not reject entries with absolute paths */
++#define ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS (0x10000)
+
+ __LA_DECL int archive_read_extract(struct archive *, struct archive_entry *,
+ int flags);
+--- libarchive-3.1.2/libarchive/archive_write_disk.3.orig
++++ libarchive-3.1.2/libarchive/archive_write_disk.3
+@@ -177,6 +177,9 @@
+ Note that paths ending in
+ .Pa ..
+ always cause an error, regardless of this flag.
++.It Cm ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS
++Refuse to extract an absolute path.
++The default is to not refuse such paths.
+ .It Cm ARCHIVE_EXTRACT_SPARSE
+ Scan data for blocks of NUL bytes and try to recreate them with holes.
+ This results in sparse files, independent of whether the archive format
+--- libarchive-3.1.2/libarchive/archive_write_disk_posix.c.orig
++++ libarchive-3.1.2/libarchive/archive_write_disk_posix.c
+@@ -2504,8 +2504,9 @@
+ /*
+ * Canonicalize the pathname. In particular, this strips duplicate
+ * '/' characters, '.' elements, and trailing '/'. It also raises an
+- * error for an empty path, a trailing '..' or (if _SECURE_NODOTDOT is
+- * set) any '..' in the path.
++ * error for an empty path, a trailing '..', (if _SECURE_NODOTDOT is
++ * set) any '..' in the path or (if ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS
++ * is set) if the path is absolute.
+ */
+ static int
+ cleanup_pathname(struct archive_write_disk *a)
+@@ -2524,8 +2525,15 @@
+ cleanup_pathname_win(a);
+ #endif
+ /* Skip leading '/'. */
+- if (*src == '/')
++ if (*src == '/') {
++ if (a->flags & ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS) {
++ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
++ "Path is absolute");
++ return (ARCHIVE_FAILED);
++ }
++
+ separator = *src++;
++ }
+
+ /* Scan the pathname one element at a time. */
+ for (;;) {
+--- libarchive-3.1.2/libarchive/test/test_write_disk_secure.c.orig
++++ libarchive-3.1.2/libarchive/test/test_write_disk_secure.c
+@@ -178,6 +178,29 @@
+ assert(S_ISDIR(st.st_mode));
+ archive_entry_free(ae);
+
++ /*
++ * Without security checks, we should be able to
++ * extract an absolute path.
++ */
++ assert((ae = archive_entry_new()) != NULL);
++ archive_entry_copy_pathname(ae, "/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
++ archive_entry_set_mode(ae, S_IFREG | 0777);
++ assert(0 == archive_write_header(a, ae));
++ assert(0 == archive_write_finish_entry(a));
++ assertFileExists("/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
++ assert(0 == unlink("/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp"));
++
++ /* But with security checks enabled, this should fail. */
++ assert(archive_entry_clear(ae) != NULL);
++ archive_entry_copy_pathname(ae, "/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
++ archive_entry_set_mode(ae, S_IFREG | 0777);
++ archive_write_disk_set_options(a, ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS);
++ failure("Extracting an absolute path should fail here.");
++ assertEqualInt(ARCHIVE_FAILED, archive_write_header(a, ae));
++ archive_entry_free(ae);
++ assert(0 == archive_write_finish_entry(a));
++ assertFileNotExists("/tmp/libarchive_test-test_write_disk_secure-absolute_path.tmp");
++
+ assertEqualInt(ARCHIVE_OK, archive_write_free(a));
+
+ /* Test the entries on disk. */
+--- libarchive-3.1.2/libarchive/archive_write.c.orig 2016-06-03 13:15:42.862830537 +0000
++++ libarchive-3.1.2/libarchive/archive_write.c 2016-06-03 13:19:01.590826126 +0000
+@@ -671,8 +671,12 @@
+ _archive_write_data(struct archive *_a, const void *buff, size_t s)
+ {
+ struct archive_write *a = (struct archive_write *)_a;
++ const size_t max_write = INT_MAX;
+ archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC,
+ ARCHIVE_STATE_DATA, "archive_write_data");
++ /* In particular, this catches attempts to pass negative values. */
++ if (s > max_write)
++ s = max_write;
+ archive_clear_error(&a->archive);
+ return ((a->format_write_data)(a, buff, s));
+ }