wpa_supplicant: Security Advisory-CVE-2016-4477

Add CVE-2016-4477 patch for avoiding \n and \r characters in passphrase
parameters, which allows remote attackers to cause a denial of service
(daemon outage) via a crafted WPS operation.
Patches came from http://w1.fi/security/2016-1/

(From OE-Core rev: d4d4ed5f31c687b2b2b716ff0fb8ca6c7aa29853)

Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 55 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-Reject-psk-parameter-set-with-invalid-passphrase-cha.patch b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-Reject-psk-parameter-set-with-invalid-passphrase-cha.patch
new file mode 100644
index 0000000000..dd7d5f7267
--- /dev/null
+++ b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-Reject-psk-parameter-set-with-invalid-passphrase-cha.patch
@@ -0,0 +1,55 @@
+From 73e4abb24a936014727924d8b0b2965edfc117dd Mon Sep 17 00:00:00 2001
+From: Jouni Malinen <jouni@qca.qualcomm.com>
+Date: Fri, 4 Mar 2016 18:46:41 +0200
+Subject: [PATCH 1/3] Reject psk parameter set with invalid passphrase
+ character
+
+WPA/WPA2-Personal passphrase is not allowed to include control
+characters. Reject a passphrase configuration attempt if that passphrase
+includes an invalid passphrase.
+
+This fixes an issue where wpa_supplicant could have updated the
+configuration file psk parameter with arbitrary data from the control
+interface or D-Bus interface. While those interfaces are supposed to be
+accessible only for trusted users/applications, it may be possible that
+an untrusted user has access to a management software component that
+does not validate the passphrase value before passing it to
+wpa_supplicant.
+
+This could allow such an untrusted user to inject up to 63 characters of
+almost arbitrary data into the configuration file. Such configuration
+file could result in wpa_supplicant trying to load a library (e.g.,
+opensc_engine_path, pkcs11_engine_path, pkcs11_module_path,
+load_dynamic_eap) from user controlled location when starting again.
+This would allow code from that library to be executed under the
+wpa_supplicant process privileges.
+
+Upstream-Status: Backport
+
+CVE: CVE-2016-4477
+
+Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
+Signed-off-by: Zhixiong Chi <Zhixiong.Chi@windriver.com>
+---
+ wpa_supplicant/config.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/wpa_supplicant/config.c b/wpa_supplicant/config.c
+index b1c7870..fdd9643 100644
+--- a/wpa_supplicant/config.c
++++ b/wpa_supplicant/config.c
+@@ -478,6 +478,12 @@ static int wpa_config_parse_psk(const struct parse_data *data,
+                }
+                wpa_hexdump_ascii_key(MSG_MSGDUMP, "PSK (ASCII passphrase)",
+                                      (u8 *) value, len);
++               if (has_ctrl_char((u8 *) value, len)) {
++                       wpa_printf(MSG_ERROR,
++                                  "Line %d: Invalid passphrase character",
++                                  line);
++                       return -1;
++               }
+                if (ssid->passphrase && os_strlen(ssid->passphrase) == len &&
+                    os_memcmp(ssid->passphrase, value, len) == 0) {
+                        /* No change to the previously configured value */
+-- 
+1.9.1