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-rw-r--r--meta/recipes-extended/libarchive/libarchive/CVE-2021-31566-02.patch172
1 files changed, 172 insertions, 0 deletions
diff --git a/meta/recipes-extended/libarchive/libarchive/CVE-2021-31566-02.patch b/meta/recipes-extended/libarchive/libarchive/CVE-2021-31566-02.patch
new file mode 100644
index 0000000000..0dfcd1ac5c
--- /dev/null
+++ b/meta/recipes-extended/libarchive/libarchive/CVE-2021-31566-02.patch
@@ -0,0 +1,172 @@
1Description: Do not follow symlinks when processing the fixup list
2 Published as CVE-2021-31566
3Origin: upstream, https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043
4Bug-Debian: https://bugs.debian.org/1001990
5Author: Martin Matuska <martin@matuska.org>
6Last-Update: 2021-12-20
7
8CVE: CVE-2021-31566
9Upstream-Status: Backport [http://deb.debian.org/debian/pool/main/liba/libarchive/libarchive_3.4.3-2+deb11u1.debian.tar.xz]
10Signed-off-by: Ranjitsinh Rathod <ranjitsinh.rathod@kpit.com>
11
12--- a/Makefile.am
13+++ b/Makefile.am
14@@ -556,6 +556,7 @@
15 libarchive/test/test_write_disk.c \
16 libarchive/test/test_write_disk_appledouble.c \
17 libarchive/test/test_write_disk_failures.c \
18+ libarchive/test/test_write_disk_fixup.c \
19 libarchive/test/test_write_disk_hardlink.c \
20 libarchive/test/test_write_disk_hfs_compression.c \
21 libarchive/test/test_write_disk_lookup.c \
22--- a/libarchive/archive_write_disk_posix.c
23+++ b/libarchive/archive_write_disk_posix.c
24@@ -2461,6 +2461,7 @@
25 {
26 struct archive_write_disk *a = (struct archive_write_disk *)_a;
27 struct fixup_entry *next, *p;
28+ struct stat st;
29 int fd, ret;
30
31 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
32@@ -2478,6 +2479,20 @@
33 (TODO_TIMES | TODO_MODE_BASE | TODO_ACLS | TODO_FFLAGS)) {
34 fd = open(p->name,
35 O_WRONLY | O_BINARY | O_NOFOLLOW | O_CLOEXEC);
36+ if (fd == -1) {
37+ /* If we cannot lstat, skip entry */
38+ if (lstat(p->name, &st) != 0)
39+ goto skip_fixup_entry;
40+ /*
41+ * If we deal with a symbolic link, mark
42+ * it in the fixup mode to ensure no
43+ * modifications are made to its target.
44+ */
45+ if (S_ISLNK(st.st_mode)) {
46+ p->mode &= ~S_IFMT;
47+ p->mode |= S_IFLNK;
48+ }
49+ }
50 }
51 if (p->fixup & TODO_TIMES) {
52 set_times(a, fd, p->mode, p->name,
53@@ -2492,7 +2507,12 @@
54 fchmod(fd, p->mode);
55 else
56 #endif
57- chmod(p->name, p->mode);
58+#ifdef HAVE_LCHMOD
59+ lchmod(p->name, p->mode);
60+#else
61+ if (!S_ISLNK(p->mode))
62+ chmod(p->name, p->mode);
63+#endif
64 }
65 if (p->fixup & TODO_ACLS)
66 archive_write_disk_set_acls(&a->archive, fd,
67@@ -2503,6 +2523,7 @@
68 if (p->fixup & TODO_MAC_METADATA)
69 set_mac_metadata(a, p->name, p->mac_metadata,
70 p->mac_metadata_size);
71+skip_fixup_entry:
72 next = p->next;
73 archive_acl_clear(&p->acl);
74 free(p->mac_metadata);
75@@ -2643,6 +2664,7 @@
76 fe->next = a->fixup_list;
77 a->fixup_list = fe;
78 fe->fixup = 0;
79+ fe->mode = 0;
80 fe->name = strdup(pathname);
81 return (fe);
82 }
83--- a/libarchive/test/CMakeLists.txt
84+++ b/libarchive/test/CMakeLists.txt
85@@ -208,6 +208,7 @@
86 test_write_disk.c
87 test_write_disk_appledouble.c
88 test_write_disk_failures.c
89+ test_write_disk_fixup.c
90 test_write_disk_hardlink.c
91 test_write_disk_hfs_compression.c
92 test_write_disk_lookup.c
93--- /dev/null
94+++ b/libarchive/test/test_write_disk_fixup.c
95@@ -0,0 +1,77 @@
96+/*-
97+ * Copyright (c) 2021 Martin Matuska
98+ * All rights reserved.
99+ *
100+ * Redistribution and use in source and binary forms, with or without
101+ * modification, are permitted provided that the following conditions
102+ * are met:
103+ * 1. Redistributions of source code must retain the above copyright
104+ * notice, this list of conditions and the following disclaimer.
105+ * 2. Redistributions in binary form must reproduce the above copyright
106+ * notice, this list of conditions and the following disclaimer in the
107+ * documentation and/or other materials provided with the distribution.
108+ *
109+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
110+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
111+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
112+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
113+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
114+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
115+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
116+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
117+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
118+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
119+ */
120+#include "test.h"
121+
122+/*
123+ * Test fixup entries don't follow symlinks
124+ */
125+DEFINE_TEST(test_write_disk_fixup)
126+{
127+ struct archive *ad;
128+ struct archive_entry *ae;
129+ int r;
130+
131+ if (!canSymlink()) {
132+ skipping("Symlinks not supported");
133+ return;
134+ }
135+
136+ /* Write entries to disk. */
137+ assert((ad = archive_write_disk_new()) != NULL);
138+
139+ /*
140+ * Create a file
141+ */
142+ assertMakeFile("victim", 0600, "a");
143+
144+ /*
145+ * Create a directory and a symlink with the same name
146+ */
147+
148+ /* Directory: dir */
149+ assert((ae = archive_entry_new()) != NULL);
150+ archive_entry_copy_pathname(ae, "dir");
151+ archive_entry_set_mode(ae, AE_IFDIR | 0606);
152+ assertEqualIntA(ad, 0, archive_write_header(ad, ae));
153+ assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
154+ archive_entry_free(ae);
155+
156+ /* Symbolic Link: dir -> foo */
157+ assert((ae = archive_entry_new()) != NULL);
158+ archive_entry_copy_pathname(ae, "dir");
159+ archive_entry_set_mode(ae, AE_IFLNK | 0777);
160+ archive_entry_set_size(ae, 0);
161+ archive_entry_copy_symlink(ae, "victim");
162+ assertEqualIntA(ad, 0, r = archive_write_header(ad, ae));
163+ if (r >= ARCHIVE_WARN)
164+ assertEqualIntA(ad, 0, archive_write_finish_entry(ad));
165+ archive_entry_free(ae);
166+
167+ assertEqualInt(ARCHIVE_OK, archive_write_free(ad));
168+
169+ /* Test the entries on disk. */
170+ assertIsSymlink("dir", "victim", 0);
171+ assertFileMode("victim", 0600);
172+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-05-11 19:41:46 +0000