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-rw-r--r--meta/recipes-connectivity/bluez5/bluez5/CVE-2020-0556-2.patch143
1 files changed, 143 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/bluez5/bluez5/CVE-2020-0556-2.patch b/meta/recipes-connectivity/bluez5/bluez5/CVE-2020-0556-2.patch
new file mode 100644
index 00000000000..8acb2f15ec6
--- /dev/null
+++ b/meta/recipes-connectivity/bluez5/bluez5/CVE-2020-0556-2.patch
@@ -0,0 +1,143 @@
+From 3cccdbab2324086588df4ccf5f892fb3ce1f1787 Mon Sep 17 00:00:00 2001
+From: Alain Michaud <alainm@chromium.org>
+Date: Tue, 10 Mar 2020 02:35:18 +0000
+Subject: [PATCH 2/2] HID accepts bonded device connections only.
+
+This change adds a configuration for platforms to choose a more secure
+posture for the HID profile. While some older mice are known to not
+support pairing or encryption, some platform may choose a more secure
+posture by requiring the device to be bonded and require the
+connection to be encrypted when bonding is required.
+
+Reference:
+https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00352.html
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=3cccdbab2324086588df4ccf5f892fb3ce1f1787]
+Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
+CVE: CVE-2020-0556
+
+---
+ profiles/input/device.c | 23 ++++++++++++++++++++++-
+ profiles/input/device.h | 1 +
+ profiles/input/input.conf | 8 ++++++++
+ profiles/input/manager.c | 13 ++++++++++++-
+ 4 files changed, 43 insertions(+), 2 deletions(-)
+
+diff --git a/profiles/input/device.c b/profiles/input/device.c
+index 2cb3811c8..d89da2d7c 100644
+--- a/profiles/input/device.c
++++ b/profiles/input/device.c
+@@ -92,6 +92,7 @@ struct input_device {
+
+ static int idle_timeout = 0;
+ static bool uhid_enabled = false;
++static bool classic_bonded_only = false;
+
+ void input_set_idle_timeout(int timeout)
+ {
+@@ -103,6 +104,11 @@ void input_enable_userspace_hid(bool state)
+ uhid_enabled = state;
+ }
+
++void input_set_classic_bonded_only(bool state)
++{
++ classic_bonded_only = state;
++}
++
+ static void input_device_enter_reconnect_mode(struct input_device *idev);
+ static int connection_disconnect(struct input_device *idev, uint32_t flags);
+
+@@ -970,8 +976,18 @@ static int hidp_add_connection(struct input_device *idev)
+ if (device_name_known(idev->device))
+ device_get_name(idev->device, req->name, sizeof(req->name));
+
++ /* Make sure the device is bonded if required */
++ if (classic_bonded_only && !device_is_bonded(idev->device,
++ btd_device_get_bdaddr_type(idev->device))) {
++ error("Rejected connection from !bonded device %s", dst_addr);
++ goto cleanup;
++ }
++
+ /* Encryption is mandatory for keyboards */
+- if (req->subclass & 0x40) {
++ /* Some platforms may choose to require encryption for all devices */
++ /* Note that this only matters for pre 2.1 devices as otherwise the */
++ /* device is encrypted by default by the lower layers */
++ if (classic_bonded_only || req->subclass & 0x40) {
+ if (!bt_io_set(idev->intr_io, &gerr,
+ BT_IO_OPT_SEC_LEVEL, BT_IO_SEC_MEDIUM,
+ BT_IO_OPT_INVALID)) {
+@@ -1203,6 +1219,11 @@ static void input_device_enter_reconnect_mode(struct input_device *idev)
+ DBG("path=%s reconnect_mode=%s", idev->path,
+ reconnect_mode_to_string(idev->reconnect_mode));
+
++ /* Make sure the device is bonded if required */
++ if (classic_bonded_only && !device_is_bonded(idev->device,
++ btd_device_get_bdaddr_type(idev->device)))
++ return;
++
+ /* Only attempt an auto-reconnect when the device is required to
+ * accept reconnections from the host.
+ */
+diff --git a/profiles/input/device.h b/profiles/input/device.h
+index 51a9aee18..3044db673 100644
+--- a/profiles/input/device.h
++++ b/profiles/input/device.h
+@@ -29,6 +29,7 @@ struct input_conn;
+
+ void input_set_idle_timeout(int timeout);
+ void input_enable_userspace_hid(bool state);
++void input_set_classic_bonded_only(bool state);
+
+ int input_device_register(struct btd_service *service);
+ void input_device_unregister(struct btd_service *service);
+diff --git a/profiles/input/input.conf b/profiles/input/input.conf
+index 3e1d65aae..166aff4a4 100644
+--- a/profiles/input/input.conf
++++ b/profiles/input/input.conf
+@@ -11,3 +11,11 @@
+ # Enable HID protocol handling in userspace input profile
+ # Defaults to false (HIDP handled in HIDP kernel module)
+ #UserspaceHID=true
++
++# Limit HID connections to bonded devices
++# The HID Profile does not specify that devices must be bonded, however some
++# platforms may want to make sure that input connections only come from bonded
++# device connections. Several older mice have been known for not supporting
++# pairing/encryption.
++# Defaults to false to maximize device compatibility.
++#ClassicBondedOnly=true
+diff --git a/profiles/input/manager.c b/profiles/input/manager.c
+index 1d31b0652..5cd27b839 100644
+--- a/profiles/input/manager.c
++++ b/profiles/input/manager.c
+@@ -96,7 +96,7 @@ static int input_init(void)
+ config = load_config_file(CONFIGDIR "/input.conf");
+ if (config) {
+ int idle_timeout;
+- gboolean uhid_enabled;
++ gboolean uhid_enabled, classic_bonded_only;
+
+ idle_timeout = g_key_file_get_integer(config, "General",
+ "IdleTimeout", &err);
+@@ -114,6 +114,17 @@ static int input_init(void)
+ input_enable_userspace_hid(uhid_enabled);
+ } else
+ g_clear_error(&err);
++
++ classic_bonded_only = g_key_file_get_boolean(config, "General",
++ "ClassicBondedOnly", &err);
++
++ if (!err) {
++ DBG("input.conf: ClassicBondedOnly=%s",
++ classic_bonded_only ? "true" : "false");
++ input_set_classic_bonded_only(classic_bonded_only);
++ } else
++ g_clear_error(&err);
++
+ }
+
+ btd_profile_register(&input_profile);
+--
+2.24.1
+