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authorRoss Burton <ross.burton@intel.com>2014-10-02 11:31:54 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-10-16 16:05:55 +0200
commitc78877b07e137f467e7feb18e15fa06400f30881 (patch)
treeb2fe17d290ef94f4cbcd354e8680ac52c3b88277
parent02037d7daa1a24aecccc527a1ee6e78e1ed7c9dd (diff)
downloadpoky-c78877b07e137f467e7feb18e15fa06400f30881.tar.gz
bash: fix CVE-2014-6271
CVE-2014-6271 aka ShellShock. "GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment." (From OE-Core master rev: 798d833c9d4bd9ab287fa86b85b4d5f128170ed3) (From OE-Core rev: d57b9ce8bb97f88c329da973c3567d04d8eb07d2) Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat
-rw-r--r--meta/recipes-extended/bash/bash-3.2.48/cve-2014-6271.patch77
-rw-r--r--meta/recipes-extended/bash/bash-4.2/cve-2014-6271.patch95
-rw-r--r--meta/recipes-extended/bash/bash_3.2.48.bb1
-rw-r--r--meta/recipes-extended/bash/bash_4.2.bb1
4 files changed, 174 insertions, 0 deletions
diff --git a/meta/recipes-extended/bash/bash-3.2.48/cve-2014-6271.patch b/meta/recipes-extended/bash/bash-3.2.48/cve-2014-6271.patch
new file mode 100644
index 0000000000..7226ffb665
--- /dev/null
+++ b/meta/recipes-extended/bash/bash-3.2.48/cve-2014-6271.patch
@@ -0,0 +1,77 @@
1Fix CVE-2014-6271, aka ShellShock.
2
3Upstream-Status: Backport
4Signed-off-by: Ross Burton <ross.burton@intel.com>
5
6*** ../bash-3.2.51/builtins/common.h 2006-03-06 09:38:44.000000000 -0500
7--- builtins/common.h 2014-09-16 19:08:02.000000000 -0400
8***************
9*** 34,37 ****
10--- 34,39 ----
11
12 /* Flags for describe_command, shared between type.def and command.def */
13+ #define SEVAL_FUNCDEF 0x080 /* only allow function definitions */
14+ #define SEVAL_ONECMD 0x100 /* only allow a single command */
15 #define CDESC_ALL 0x001 /* type -a */
16 #define CDESC_SHORTDESC 0x002 /* command -V */
17*** ../bash-3.2.51/builtins/evalstring.c 2008-11-15 17:47:04.000000000 -0500
18--- builtins/evalstring.c 2014-09-16 19:08:02.000000000 -0400
19***************
20*** 235,238 ****
21--- 235,246 ----
22 struct fd_bitmap *bitmap;
23
24+ if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
25+ {
26+ internal_warning ("%s: ignoring function definition attempt", from_file);
27+ should_jump_to_top_level = 0;
28+ last_result = last_command_exit_value = EX_BADUSAGE;
29+ break;
30+ }
31+
32 bitmap = new_fd_bitmap (FD_BITMAP_SIZE);
33 begin_unwind_frame ("pe_dispose");
34***************
35*** 292,295 ****
36--- 300,306 ----
37 dispose_fd_bitmap (bitmap);
38 discard_unwind_frame ("pe_dispose");
39+
40+ if (flags & SEVAL_ONECMD)
41+ break;
42 }
43 }
44*** ../bash-3.2.51/variables.c 2008-11-15 17:15:06.000000000 -0500
45--- variables.c 2014-09-16 19:10:39.000000000 -0400
46***************
47*** 319,328 ****
48 strcpy (temp_string + char_index + 1, string);
49
50! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
51!
52! /* Ancient backwards compatibility. Old versions of bash exported
53! functions like name()=() {...} */
54! if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
55! name[char_index - 2] = '\0';
56
57 if (temp_var = find_function (name))
58--- 319,326 ----
59 strcpy (temp_string + char_index + 1, string);
60
61! /* Don't import function names that are invalid identifiers from the
62! environment. */
63! if (legal_identifier (name))
64! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD);
65
66 if (temp_var = find_function (name))
67***************
68*** 333,340 ****
69 else
70 report_error (_("error importing function definition for `%s'"), name);
71-
72- /* ( */
73- if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
74- name[char_index - 2] = '('; /* ) */
75 }
76 #if defined (ARRAY_VARS)
77--- 331,334 ----
diff --git a/meta/recipes-extended/bash/bash-4.2/cve-2014-6271.patch b/meta/recipes-extended/bash/bash-4.2/cve-2014-6271.patch
new file mode 100644
index 0000000000..20530adf6c
--- /dev/null
+++ b/meta/recipes-extended/bash/bash-4.2/cve-2014-6271.patch
@@ -0,0 +1,95 @@
1Fix CVE-2014-6271, aka ShellShock. This is the upstream 4.2 patchlevel 48, minus the hunk to
2set the patch level.
3
4Upstream-Status: Backport
5Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
6
7 BASH PATCH REPORT
8 =================
9
10Bash-Release: 4.2
11Patch-ID: bash42-048
12
13Bug-Reported-by: Stephane Chazelas <stephane.chazelas@gmail.com>
14Bug-Reference-ID:
15Bug-Reference-URL:
16
17Bug-Description:
18
19Under certain circumstances, bash will execute user code while processing the
20environment for exported function definitions.
21
22Patch (apply with `patch -p0'):
23
24*** ../bash-4.2.47/builtins/common.h 2010-05-30 18:31:51.000000000 -0400
25--- builtins/common.h 2014-09-16 19:35:45.000000000 -0400
26***************
27*** 36,39 ****
28--- 36,41 ----
29
30 /* Flags for describe_command, shared between type.def and command.def */
31+ #define SEVAL_FUNCDEF 0x080 /* only allow function definitions */
32+ #define SEVAL_ONECMD 0x100 /* only allow a single command */
33 #define CDESC_ALL 0x001 /* type -a */
34 #define CDESC_SHORTDESC 0x002 /* command -V */
35*** ../bash-4.2.47/builtins/evalstring.c 2010-11-23 08:22:15.000000000 -0500
36--- builtins/evalstring.c 2014-09-16 19:35:45.000000000 -0400
37***************
38*** 262,265 ****
39--- 262,273 ----
40 struct fd_bitmap *bitmap;
41
42+ if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
43+ {
44+ internal_warning ("%s: ignoring function definition attempt", from_file);
45+ should_jump_to_top_level = 0;
46+ last_result = last_command_exit_value = EX_BADUSAGE;
47+ break;
48+ }
49+
50 bitmap = new_fd_bitmap (FD_BITMAP_SIZE);
51 begin_unwind_frame ("pe_dispose");
52***************
53*** 322,325 ****
54--- 330,336 ----
55 dispose_fd_bitmap (bitmap);
56 discard_unwind_frame ("pe_dispose");
57+
58+ if (flags & SEVAL_ONECMD)
59+ break;
60 }
61 }
62*** ../bash-4.2.47/variables.c 2011-03-01 16:15:20.000000000 -0500
63--- variables.c 2014-09-16 19:35:45.000000000 -0400
64***************
65*** 348,357 ****
66 strcpy (temp_string + char_index + 1, string);
67
68! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
69!
70! /* Ancient backwards compatibility. Old versions of bash exported
71! functions like name()=() {...} */
72! if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
73! name[char_index - 2] = '\0';
74
75 if (temp_var = find_function (name))
76--- 348,355 ----
77 strcpy (temp_string + char_index + 1, string);
78
79! /* Don't import function names that are invalid identifiers from the
80! environment. */
81! if (legal_identifier (name))
82! parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD);
83
84 if (temp_var = find_function (name))
85***************
86*** 362,369 ****
87 else
88 report_error (_("error importing function definition for `%s'"), name);
89-
90- /* ( */
91- if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
92- name[char_index - 2] = '('; /* ) */
93 }
94 #if defined (ARRAY_VARS)
95--- 360,363 ----
diff --git a/meta/recipes-extended/bash/bash_3.2.48.bb b/meta/recipes-extended/bash/bash_3.2.48.bb
index 4e6f0f3ea1..cbe1ee6623 100644
--- a/meta/recipes-extended/bash/bash_3.2.48.bb
+++ b/meta/recipes-extended/bash/bash_3.2.48.bb
@@ -10,6 +10,7 @@ SRC_URI = "${GNU_MIRROR}/bash/bash-${PV}.tar.gz;name=tarball \
10 ${GNU_MIRROR}/bash/bash-3.2-patches/bash32-050;apply=yes;striplevel=0;name=patch002 \ 10 ${GNU_MIRROR}/bash/bash-3.2-patches/bash32-050;apply=yes;striplevel=0;name=patch002 \
11 ${GNU_MIRROR}/bash/bash-3.2-patches/bash32-051;apply=yes;striplevel=0;name=patch003 \ 11 ${GNU_MIRROR}/bash/bash-3.2-patches/bash32-051;apply=yes;striplevel=0;name=patch003 \
12 file://mkbuiltins_have_stringize.patch \ 12 file://mkbuiltins_have_stringize.patch \
13 file://cve-2014-6271.patch;striplevel=0 \
13 " 14 "
14 15
15SRC_URI[tarball.md5sum] = "338dcf975a93640bb3eaa843ca42e3f8" 16SRC_URI[tarball.md5sum] = "338dcf975a93640bb3eaa843ca42e3f8"
diff --git a/meta/recipes-extended/bash/bash_4.2.bb b/meta/recipes-extended/bash/bash_4.2.bb
index fefe7b799d..83294b040a 100644
--- a/meta/recipes-extended/bash/bash_4.2.bb
+++ b/meta/recipes-extended/bash/bash_4.2.bb
@@ -19,6 +19,7 @@ SRC_URI = "${GNU_MIRROR}/bash/${BPN}-${PV}.tar.gz;name=tarball \
19 ${GNU_MIRROR}/bash/bash-4.2-patches/bash42-010;apply=yes;striplevel=0;name=patch010 \ 19 ${GNU_MIRROR}/bash/bash-4.2-patches/bash42-010;apply=yes;striplevel=0;name=patch010 \
20 file://execute_cmd.patch;striplevel=0 \ 20 file://execute_cmd.patch;striplevel=0 \
21 file://mkbuiltins_have_stringize.patch \ 21 file://mkbuiltins_have_stringize.patch \
22 file://cve-2014-6271.patch;striplevel=0 \
22 file://build-tests.patch \ 23 file://build-tests.patch \
23 file://test-output.patch \ 24 file://test-output.patch \
24 file://run-ptest \ 25 file://run-ptest \
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-24 17:41:29 +0000