linux/net/bluetooth
Ben Seri 06e7e776ca Bluetooth: Prevent stack info leak from the EFS element.
In the function l2cap_parse_conf_rsp and in the function
l2cap_parse_conf_req the following variable is declared without
initialization:

struct l2cap_conf_efs efs;

In addition, when parsing input configuration parameters in both of
these functions, the switch case for handling EFS elements may skip the
memcpy call that will write to the efs variable:

...
case L2CAP_CONF_EFS:
if (olen == sizeof(efs))
memcpy(&efs, (void *)val, olen);
...

The olen in the above if is attacker controlled, and regardless of that
if, in both of these functions the efs variable would eventually be
added to the outgoing configuration request that is being built:

l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs), (unsigned long) &efs);

So by sending a configuration request, or response, that contains an
L2CAP_CONF_EFS element, but with an element length that is not
sizeof(efs) - the memcpy to the uninitialized efs variable can be
avoided, and the uninitialized variable would be returned to the
attacker (16 bytes).

This issue has been assigned CVE-2017-1000410

Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Ben Seri <ben@armis.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-04 17:01:01 +01:00
..
bnep Bluetooth: bnep: fix possible might sleep error in bnep_session 2017-06-27 19:32:11 +02:00
cmtp Bluetooth: cmtp: fix possible might sleep error in cmtp_session 2017-06-27 19:32:11 +02:00
hidp treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
rfcomm treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
6lowpan.c 6lowpan: fix set not used warning 2017-07-25 12:31:37 -07:00
Kconfig Revert "Bluetooth: Add option for disabling legacy ioctl interfaces" 2017-09-28 13:20:32 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
a2mp.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
a2mp.h Bluetooth: Add BT_HS config option 2015-07-30 13:31:59 +02:00
af_bluetooth.c net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
amp.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
amp.h Bluetooth: Add BT_HS config option 2015-07-30 13:31:59 +02:00
ecdh_helper.c Bluetooth: let the crypto subsystem generate the ecc privkey 2017-10-06 20:35:47 +02:00
ecdh_helper.h Bluetooth: let the crypto subsystem generate the ecc privkey 2017-10-06 20:35:47 +02:00
hci_conn.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
hci_core.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
hci_debugfs.c Bluetooth: Add debugfs fields for hardware and firmware info 2016-07-18 09:33:28 +03:00
hci_debugfs.h Bluetooth: Provide option to enable/disable debugfs information 2015-02-15 18:54:13 +02:00
hci_event.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
hci_request.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
hci_request.h Bluetooth: Fix potential memory leak 2017-10-29 14:07:10 +01:00
hci_sock.c Bluetooth: avoid recursive locking in hci_send_to_channel() 2017-10-30 09:04:07 +01:00
hci_sysfs.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
l2cap_core.c Bluetooth: Prevent stack info leak from the EFS element. 2018-01-04 17:01:01 +01:00
l2cap_sock.c Bluetooth: Add sockaddr length checks before accessing sa_family in bind and connect handlers 2017-06-29 14:37:57 +02:00
leds.c Bluetooth: Add combined LED trigger for controller power 2016-09-19 20:19:34 +02:00
leds.h Bluetooth: Add combined LED trigger for controller power 2016-09-19 20:19:34 +02:00
lib.c Bluetooth: make baswap src const 2017-09-01 22:49:47 +02:00
mgmt.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
mgmt_util.c networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
mgmt_util.h Bluetooth: Add generic mgmt helper API 2015-03-17 18:03:08 +01:00
sco.c treewide: setup_timer() -> timer_setup() 2017-11-21 15:57:07 -08:00
selftest.c Bluetooth: Fix compiler warning with selftest duration calculation 2017-10-06 21:49:13 +03:00
selftest.h Bluetooth: Add support for self testing framework 2014-12-30 08:53:55 +02:00
smp.c Bluetooth: Use bt_dev_err and bt_dev_info when possible 2017-10-30 12:25:45 +02:00
smp.h Bluetooth: SMP: Add support for H7 crypto function and CT2 auth flag 2016-12-08 07:50:24 +01:00