mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
Bluetooth: L2CAP: Fix accepting connection request for invalid SPSM
commit 711f8c3fb3
upstream.
The Bluetooth spec states that the valid range for SPSM is from
0x0001-0x00ff so it is invalid to accept values outside of this range:
BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 3, Part A
page 1059:
Table 4.15: L2CAP_LE_CREDIT_BASED_CONNECTION_REQ SPSM ranges
CVE: CVE-2022-42896
CC: stable@vger.kernel.org
Reported-by: Tamás Koczka <poprdi@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
b5041a3daa
commit
0d87bb6070
1 changed files with 13 additions and 0 deletions
|
@ -5571,6 +5571,19 @@ static int l2cap_le_connect_req(struct l2cap_conn *conn,
|
|||
BT_DBG("psm 0x%2.2x scid 0x%4.4x mtu %u mps %u", __le16_to_cpu(psm),
|
||||
scid, mtu, mps);
|
||||
|
||||
/* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 3, Part A
|
||||
* page 1059:
|
||||
*
|
||||
* Valid range: 0x0001-0x00ff
|
||||
*
|
||||
* Table 4.15: L2CAP_LE_CREDIT_BASED_CONNECTION_REQ SPSM ranges
|
||||
*/
|
||||
if (!psm || __le16_to_cpu(psm) > L2CAP_PSM_LE_DYN_END) {
|
||||
result = L2CAP_CR_LE_BAD_PSM;
|
||||
chan = NULL;
|
||||
goto response;
|
||||
}
|
||||
|
||||
/* Check if we have socket listening on psm */
|
||||
pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, &conn->hcon->src,
|
||||
&conn->hcon->dst, LE_LINK);
|
||||
|
|
Loading…
Reference in a new issue