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-rw-r--r--meta/recipes-extended/cpio/cpio-2.12/0001-Fix-CVE-2015-1197.patch177
1 files changed, 177 insertions, 0 deletions
diff --git a/meta/recipes-extended/cpio/cpio-2.12/0001-Fix-CVE-2015-1197.patch b/meta/recipes-extended/cpio/cpio-2.12/0001-Fix-CVE-2015-1197.patch
new file mode 100644
index 0000000000..8f719ad8d6
--- /dev/null
+++ b/meta/recipes-extended/cpio/cpio-2.12/0001-Fix-CVE-2015-1197.patch
@@ -0,0 +1,177 @@
1From dcee489f821c1260a0136fcdfdb6ff4dd11086ac Mon Sep 17 00:00:00 2001
2From: Alexander Kanavin <alex.kanavin@gmail.com>
3Date: Wed, 9 Dec 2015 17:58:03 +0200
4Subject: [PATCH] Fix CVE-2015-1197
5
6Apply patch by Vitezslav Cizek of SuSE to fix CVE-2015-1197.
7Upstream is dormant or no longer existing. To restore the old
8behaviour use --extract-over-symlinks (Closes: #774669)
9This issue has been discovered by Alexander Cherepanov.
10Author: Vitezslav Cizek <vcizek@suse.cz>
11Bug-Debian: https://bugs.debian.org/774669
12
13Upstream-Status: Pending
14Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
15Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
16
17---
18 doc/cpio.1 | 1 +
19 src/copyin.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20 src/extern.h | 1 +
21 src/global.c | 3 +++
22 src/main.c | 7 +++++++
23 5 files changed, 74 insertions(+)
24
25diff --git a/doc/cpio.1 b/doc/cpio.1
26index 2a68241..dc4676c 100644
27--- a/doc/cpio.1
28+++ b/doc/cpio.1
29@@ -49,6 +49,7 @@ cpio \- copy files to and from archives
30 [\fB\-\-no\-preserve\-owner\fR] [\fB\-\-message=\fIMESSAGE\fR]
31 [\fB\-\-force\-local\fR] [\fB\-\-no\-absolute\-filenames\fR] [\fB\-\-sparse\fR]
32 [\fB\-\-only\-verify\-crc\fR] [\fB\-\-to\-stdout\fR] [\fB\-\-quiet\fR]
33+[\fB\-\-extract\-over\-symlinks\fR]
34 [\fB\-\-rsh\-command=\fICOMMAND\fR]
35 [\fIpattern\fR...] [\fB<\fR \fIarchive\fR]
36
37diff --git a/src/copyin.c b/src/copyin.c
38index cde911e..053afe7 100644
39--- a/src/copyin.c
40+++ b/src/copyin.c
41@@ -695,6 +695,51 @@ copyin_link (struct cpio_file_stat *file_hdr, int in_file_des)
42 free (link_name);
43 }
44
45+
46+static int
47+path_contains_symlink(char *path)
48+{
49+ struct stat st;
50+ char *slash;
51+ char *nextslash;
52+
53+ /* we got NULL pointer or empty string */
54+ if (!path || !*path) {
55+ return false;
56+ }
57+
58+ slash = path;
59+
60+ while ((nextslash = strchr(slash + 1, '/')) != NULL) {
61+ slash = nextslash;
62+ *slash = '\0';
63+
64+ if (lstat(path, &st) != 0) {
65+ if (errno == ELOOP) {
66+ /* ELOOP - too many symlinks */
67+ *slash = '/';
68+ return true;
69+ } else if (errno == ENOMEM) {
70+ /* No memory for lstat - terminate */
71+ xalloc_die();
72+ } else {
73+ /* cannot lstat path - give up */
74+ *slash = '/';
75+ return false;
76+ }
77+ }
78+
79+ if (S_ISLNK(st.st_mode)) {
80+ *slash = '/';
81+ return true;
82+ }
83+
84+ *slash = '/';
85+ }
86+
87+ return false;
88+}
89+
90 static void
91 copyin_file (struct cpio_file_stat *file_hdr, int in_file_des)
92 {
93@@ -1468,6 +1513,23 @@ process_copy_in ()
94 {
95 /* Copy the input file into the directory structure. */
96
97+ /* Can we write files over symlinks? */
98+ if (!extract_over_symlinks)
99+ {
100+ if (path_contains_symlink(file_hdr.c_name))
101+ {
102+ /* skip the file */
103+ /*
104+ fprintf(stderr, "Can't write over symlinks. Skipping %s\n", file_hdr.c_name);
105+ tape_toss_input (in_file_des, file_hdr.c_filesize);
106+ tape_skip_padding (in_file_des, file_hdr.c_filesize);
107+ continue;
108+ */
109+ /* terminate */
110+ error (1, 0, _("Can't write over symlinks: %s\n"), file_hdr.c_name);
111+ }
112+ }
113+
114 /* Do we need to rename the file? */
115 if (rename_flag || rename_batch_file)
116 {
117diff --git a/src/extern.h b/src/extern.h
118index e27d662..d864bde 100644
119--- a/src/extern.h
120+++ b/src/extern.h
121@@ -96,6 +96,7 @@ extern char input_is_special;
122 extern char output_is_special;
123 extern char input_is_seekable;
124 extern char output_is_seekable;
125+extern bool extract_over_symlinks;
126 extern int (*xstat) ();
127 extern void (*copy_function) ();
128 extern char *change_directory_option;
129diff --git a/src/global.c b/src/global.c
130index 57e505a..336fce4 100644
131--- a/src/global.c
132+++ b/src/global.c
133@@ -187,6 +187,9 @@ bool to_stdout_option = false;
134 /* The name this program was run with. */
135 char *program_name;
136
137+/* Extract files over symbolic links */
138+bool extract_over_symlinks;
139+
140 /* A pointer to either lstat or stat, depending on whether
141 dereferencing of symlinks is done for input files. */
142 int (*xstat) ();
143diff --git a/src/main.c b/src/main.c
144index a13861f..87cb309 100644
145--- a/src/main.c
146+++ b/src/main.c
147@@ -59,6 +59,7 @@ enum cpio_options {
148 DEBUG_OPTION,
149 BLOCK_SIZE_OPTION,
150 TO_STDOUT_OPTION,
151+ EXTRACT_OVER_SYMLINKS,
152 RENUMBER_INODES_OPTION,
153 IGNORE_DEVNO_OPTION,
154 DEVICE_INDEPENDENT_OPTION
155@@ -243,6 +244,8 @@ static struct argp_option options[] = {
156 N_("Create leading directories where needed"), GRID+1 },
157 {"no-preserve-owner", NO_PRESERVE_OWNER_OPTION, 0, 0,
158 N_("Do not change the ownership of the files"), GRID+1 },
159+ {"extract-over-symlinks", EXTRACT_OVER_SYMLINKS, 0, 0,
160+ N_("Force writing over symbolic links"), GRID+1 },
161 {"unconditional", 'u', NULL, 0,
162 N_("Replace all files unconditionally"), GRID+1 },
163 {"sparse", SPARSE_OPTION, NULL, 0,
164@@ -432,6 +435,10 @@ crc newc odc bin ustar tar (all-caps also recognized)"), arg));
165 no_chown_flag = true;
166 break;
167
168+ case EXTRACT_OVER_SYMLINKS: /* --extract-over-symlinks */
169+ extract_over_symlinks = true;
170+ break;
171+
172 case 'o': /* Copy-out mode. */
173 if (copy_function != 0)
174 USAGE_ERROR ((0, 0, _("Mode already defined")));
175--
1762.6.2
177
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