cpio: unbundle patch (fetch from my GitHub acct.)
This commit is contained in:
Tobias Geerinckx-Rice
parent
3278007dae
commit
27678026d7
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@ -1,149 +0,0 @@
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Original: https://marc.info/?l=oss-security&m=142289947619786&w=2
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Re-applied to 2.12 by Tobias Geerinckx-Rice
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<tobias.geerinckx.rice@gmail.com> - any bugs are (probably) mine.
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diff -Naur cpio-2.12a/doc/cpio.1 cpio-2.12b/doc/cpio.1
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--- cpio-2.12a/doc/cpio.1 2015-09-12 12:57:30.000000000 +0200
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+++ cpio-2.12b/doc/cpio.1 2015-09-18 05:35:48.158146735 +0200
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@@ -29,6 +29,7 @@
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[\fB\-\-block\-size=\fIblocks\fR] [\fB\-\-dereference\fR]
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[\fB\-\-io\-size=\fIBYTES\fR] [\fB\-\-quiet\fR]
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[\fB\-\-force\-local\fR] [\fB\-\-rsh\-command=\fICOMMAND\fR]
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+[\fB\-\-extract\-over\-symlinks]
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\fB<\fR \fIname-list\fR [\fB>\fR \fIarchive\fR]
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.B cpio
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diff -Naur cpio-2.12a/src/copyin.c cpio-2.12b/src/copyin.c
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--- cpio-2.12a/src/copyin.c 2015-09-12 12:57:30.000000000 +0200
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+++ cpio-2.12b/src/copyin.c 2015-09-18 05:31:22.088544481 +0200
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@@ -695,6 +695,50 @@
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free (link_name);
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}
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+static int
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+path_contains_symlink(char *path)
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+{
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+ struct stat st;
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+ char *slash;
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+ char *nextslash;
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+
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+ /* we got NULL pointer or empty string */
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+ if (!path || !*path) {
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+ return false;
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+ }
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+
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+ slash = path;
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+
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+ while ((nextslash = strchr(slash + 1, '/')) != NULL) {
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+ slash = nextslash;
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+ *slash = '\0';
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+
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+ if (lstat(path, &st) != 0) {
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+ if (errno == ELOOP) {
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+ /* ELOOP - too many symlinks */
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+ *slash = '/';
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+ return true;
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+ } else if (errno == ENOMEM) {
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+ /* No memory for lstat - terminate */
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+ xalloc_die();
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+ } else {
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+ /* cannot lstat path - give up */
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+ *slash = '/';
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+ return false;
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+ }
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+ }
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+
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+ if (S_ISLNK(st.st_mode)) {
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+ *slash = '/';
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+ return true;
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+ }
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+
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+ *slash = '/';
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+ }
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+
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+ return false;
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+}
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+
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static void
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copyin_file (struct cpio_file_stat *file_hdr, int in_file_des)
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{
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@@ -1468,6 +1512,23 @@
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{
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/* Copy the input file into the directory structure. */
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+ /* Can we write files over symlinks? */
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+ if (!extract_over_symlinks)
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+ {
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+ if (path_contains_symlink(file_hdr.c_name))
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+ {
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+ /* skip the file */
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+ /*
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+ fprintf(stderr, "Can't write over symlinks. Skipping %s\n", file_hdr.c_name);
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+ tape_toss_input (in_file_des, file_hdr.c_filesize);
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+ tape_skip_padding (in_file_des, file_hdr.c_filesize);
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+ continue;
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+ */
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+ /* terminate */
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+ error (1, 0, _("Can't write over symlinks: %s\n"), file_hdr.c_name);
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+ }
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+ }
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+
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/* Do we need to rename the file? */
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if (rename_flag || rename_batch_file)
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{
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diff -Naur cpio-2.12a/src/extern.h cpio-2.12b/src/extern.h
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--- cpio-2.12a/src/extern.h 2015-09-12 12:57:30.000000000 +0200
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+++ cpio-2.12b/src/extern.h 2015-09-18 05:34:45.208241420 +0200
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@@ -96,6 +96,7 @@
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extern char output_is_special;
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extern char input_is_seekable;
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extern char output_is_seekable;
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+extern bool extract_over_symlinks;
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extern int (*xstat) ();
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extern void (*copy_function) ();
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extern char *change_directory_option;
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diff -Naur cpio-2.12a/src/global.c cpio-2.12b/src/global.c
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--- cpio-2.12a/src/global.c 2015-09-12 12:57:30.000000000 +0200
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+++ cpio-2.12b/src/global.c 2015-09-18 05:32:00.598487355 +0200
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@@ -187,6 +187,9 @@
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/* The name this program was run with. */
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char *program_name;
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+/* Extract files over symbolic links */
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+bool extract_over_symlinks;
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+
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/* A pointer to either lstat or stat, depending on whether
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dereferencing of symlinks is done for input files. */
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int (*xstat) ();
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diff -Naur cpio-2.12a/src/main.c cpio-2.12b/src/main.c
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--- cpio-2.12a/src/main.c 2015-09-12 12:57:30.000000000 +0200
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+++ cpio-2.12b/src/main.c 2015-09-18 05:34:20.018279218 +0200
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@@ -59,6 +59,7 @@
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DEBUG_OPTION,
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BLOCK_SIZE_OPTION,
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TO_STDOUT_OPTION,
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+ EXTRACT_OVER_SYMLINKS,
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RENUMBER_INODES_OPTION,
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IGNORE_DEVNO_OPTION,
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DEVICE_INDEPENDENT_OPTION
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@@ -243,6 +244,8 @@
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N_("Create leading directories where needed"), GRID+1 },
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{"no-preserve-owner", NO_PRESERVE_OWNER_OPTION, 0, 0,
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N_("Do not change the ownership of the files"), GRID+1 },
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+ {"extract-over-symlinks", EXTRACT_OVER_SYMLINKS, 0, 0,
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+ N_("Force writing over symbolic links"), GRID+1 },
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{"unconditional", 'u', NULL, 0,
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N_("Replace all files unconditionally"), GRID+1 },
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{"sparse", SPARSE_OPTION, NULL, 0,
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@@ -432,6 +435,10 @@
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no_chown_flag = true;
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break;
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+ case EXTRACT_OVER_SYMLINKS: /* --extract-over-symlinks */
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+ extract_over_symlinks = true;
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+ break;
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+
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case 'o': /* Copy-out mode. */
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if (copy_function != 0)
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USAGE_ERROR ((0, 0, _("Mode already defined")));
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@ -11,7 +11,15 @@ in stdenv.mkDerivation {
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sha256 = "0vi9q475h1rki53100zml75vxsykzyhrn70hidy41s5c2rc8r6bh";
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};
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patches = [ ./CVE-2015-1197-cpio-2.12.patch ];
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patches = [
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(fetchpatch {
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name = "CVE-2015-1197-cpio-2.12.patch";
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url = "https://gist.github.com/nckx/70b0bfa80ddfb86c2967/"
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+ "raw/e9b40d4d4b701f584f826775b75beb10751dc884/"
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+ "CVE-2015-1197-cpio-2.12.patch";
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sha256 = "0ph43m4lavwkc4gnl5h9p3da4kb1pnhwk5l2qsky70dqri8pcr8v";
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})
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];
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preConfigure = if stdenv.isCygwin then ''
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sed -i gnu/fpending.h -e 's,include <stdio_ext.h>,,'
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