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authorSona Sarmadi <sona.sarmadi@enea.com>2016-10-10 13:54:35 +0200
committerRichard Purdie <richard.purdie@linuxfoundation.org>2016-11-08 23:03:18 +0000
commit24455c63494b7030b8a337f0dad98687d15d9ce6 (patch)
treeaf035732856e5a15f83240fec9e1853e4c66089d
parentcca372506522c1d588f9ebc66c6051089743d2a9 (diff)
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bash: Security fix CVE-2016-0634
References to upstream patch: https://ftp.gnu.org/pub/gnu/bash/bash-4.3-patches/bash43-047 http://openwall.com/lists/oss-security/2016/09/16/8 Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
-rw-r--r--meta/recipes-extended/bash/bash/CVE-2016-0634.patch136
-rw-r--r--meta/recipes-extended/bash/bash_4.3.30.bb1
2 files changed, 137 insertions, 0 deletions
diff --git a/meta/recipes-extended/bash/bash/CVE-2016-0634.patch b/meta/recipes-extended/bash/bash/CVE-2016-0634.patch
new file mode 100644
index 0000000000..71c033e9a4
--- /dev/null
+++ b/meta/recipes-extended/bash/bash/CVE-2016-0634.patch
@@ -0,0 +1,136 @@
+Bash-Release: 4.3
+Patch-ID: bash43-047
+
+Bug-Reported-by: Bernd Dietzel
+Bug-Reference-ID:
+Bug-Reference-URL: https://bugs.launchpad.net/ubuntu/+source/bash/+bug/1507025
+
+Bug-Description:
+
+Bash performs word expansions on the prompt strings after the special
+escape sequences are expanded. If a malicious user can modify the system
+hostname or change the name of the bash executable and coerce a user into
+executing it, and the new name contains word expansions (including
+command substitution), bash will expand them in prompt strings containing
+the \h or \H and \s escape sequences, respectively.
+
+Patch (apply with `patch -p0')
+
+CVE: CVE-2016-0634
+Upstream-Status: Backport
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+
+*** ../bash-4.3-patched/parse.y 2015-08-13 15:11:54.000000000 -0400
+--- parse.y 2016-03-07 15:44:14.000000000 -0500
+***************
+*** 5259,5263 ****
+ int result_size, result_index;
+ int c, n, i;
+! char *temp, octal_string[4];
+ struct tm *tm;
+ time_t the_time;
+--- 5259,5263 ----
+ int result_size, result_index;
+ int c, n, i;
+! char *temp, *t_host, octal_string[4];
+ struct tm *tm;
+ time_t the_time;
+***************
+*** 5407,5411 ****
+ case 's':
+ temp = base_pathname (shell_name);
+! temp = savestring (temp);
+ goto add_string;
+
+--- 5407,5415 ----
+ case 's':
+ temp = base_pathname (shell_name);
+! /* Try to quote anything the user can set in the file system */
+! if (promptvars || posixly_correct)
+! temp = sh_backslash_quote_for_double_quotes (temp);
+! else
+! temp = savestring (temp);
+ goto add_string;
+
+***************
+*** 5497,5503 ****
+ case 'h':
+ case 'H':
+! temp = savestring (current_host_name);
+! if (c == 'h' && (t = (char *)strchr (temp, '.')))
+ *t = '\0';
+ goto add_string;
+
+--- 5501,5515 ----
+ case 'h':
+ case 'H':
+! t_host = savestring (current_host_name);
+! if (c == 'h' && (t = (char *)strchr (t_host, '.')))
+ *t = '\0';
++ if (promptvars || posixly_correct)
++ /* Make sure that expand_prompt_string is called with a
++ second argument of Q_DOUBLE_QUOTES if we use this
++ function here. */
++ temp = sh_backslash_quote_for_double_quotes (t_host);
++ else
++ temp = savestring (t_host);
++ free (t_host);
+ goto add_string;
+
+*** ../bash-4.3-patched/y.tab.c 2015-08-13 15:11:54.000000000 -0400
+--- y.tab.c 2016-03-07 15:44:14.000000000 -0500
+***************
+*** 7571,7575 ****
+ int result_size, result_index;
+ int c, n, i;
+! char *temp, octal_string[4];
+ struct tm *tm;
+ time_t the_time;
+--- 7571,7575 ----
+ int result_size, result_index;
+ int c, n, i;
+! char *temp, *t_host, octal_string[4];
+ struct tm *tm;
+ time_t the_time;
+***************
+*** 7719,7723 ****
+ case 's':
+ temp = base_pathname (shell_name);
+! temp = savestring (temp);
+ goto add_string;
+
+--- 7719,7727 ----
+ case 's':
+ temp = base_pathname (shell_name);
+! /* Try to quote anything the user can set in the file system */
+! if (promptvars || posixly_correct)
+! temp = sh_backslash_quote_for_double_quotes (temp);
+! else
+! temp = savestring (temp);
+ goto add_string;
+
+***************
+*** 7809,7815 ****
+ case 'h':
+ case 'H':
+! temp = savestring (current_host_name);
+! if (c == 'h' && (t = (char *)strchr (temp, '.')))
+ *t = '\0';
+ goto add_string;
+
+--- 7813,7827 ----
+ case 'h':
+ case 'H':
+! t_host = savestring (current_host_name);
+! if (c == 'h' && (t = (char *)strchr (t_host, '.')))
+ *t = '\0';
++ if (promptvars || posixly_correct)
++ /* Make sure that expand_prompt_string is called with a
++ second argument of Q_DOUBLE_QUOTES if we use this
++ function here. */
++ temp = sh_backslash_quote_for_double_quotes (t_host);
++ else
++ temp = savestring (t_host);
++ free (t_host);
+ goto add_string;
+
diff --git a/meta/recipes-extended/bash/bash_4.3.30.bb b/meta/recipes-extended/bash/bash_4.3.30.bb
index 95ed3925c7..fcd6cafd7a 100644
--- a/meta/recipes-extended/bash/bash_4.3.30.bb
+++ b/meta/recipes-extended/bash/bash_4.3.30.bb
@@ -21,6 +21,7 @@ SRC_URI = "${GNU_MIRROR}/bash/${BP}.tar.gz;name=tarball \
file://fix-run-coproc-run-heredoc-run-execscript-run-test-f.patch \
file://run-ptest \
file://fix-run-builtins.patch \
+ file://CVE-2016-0634.patch;striplevel=0 \
"
SRC_URI[tarball.md5sum] = "a27b3ee9be83bd3ba448c0ff52b28447"