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Fix BleedingTooth CVE-2020-12351 CVE-2020-12352 (rhbz 1886521 1888439 1886529 1888440) 

Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>
This commit is contained in:
Justin M. Forbes 2020-10-15 10:31:29 -05:00
parent b84b27ed88
commit 482f2b98e4
2 changed files with 327 additions and 1 deletions
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320
bluetooth_cves.patch Normal file
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@ -0,0 +1,320 @@
From MAILER-DAEMON Thu Oct 15 15:17:31 2020
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH 1/4] Bluetooth: A2MP: Fix not initializing all members
Date: Thu, 06 Aug 2020 11:17:11 -0700
Message-Id: <20200806181714.3216076-1-luiz.dentz@gmail.com>
Sender: linux-bluetooth-owner@vger.kernel.org
List-ID: <linux-bluetooth.vger.kernel.org>
X-Mailing-List: linux-bluetooth@vger.kernel.org
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This fixes various places where a stack variable is used uninitialized.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
net/bluetooth/a2mp.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 26526be579c7..da7fd7c8c2dc 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -226,6 +226,9 @@ static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
struct a2mp_info_req req;
found = true;
+
+ memset(&req, 0, sizeof(req));
+
req.id = cl->id;
a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
sizeof(req), &req);
@@ -305,6 +308,8 @@ static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
if (!hdev || hdev->dev_type != HCI_AMP) {
struct a2mp_info_rsp rsp;
+ memset(&rsp, 0, sizeof(rsp));
+
rsp.id = req->id;
rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
@@ -348,6 +353,8 @@ static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
if (!ctrl)
return -ENOMEM;
+ memset(&req, 0, sizeof(req));
+
req.id = rsp->id;
a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
&req);
@@ -376,6 +383,8 @@ static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
struct a2mp_amp_assoc_rsp rsp;
rsp.id = req->id;
+ memset(&rsp, 0, sizeof(rsp));
+
if (tmp) {
rsp.status = A2MP_STATUS_COLLISION_OCCURED;
amp_mgr_put(tmp);
@@ -464,7 +473,6 @@ static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
struct a2mp_cmd *hdr)
{
struct a2mp_physlink_req *req = (void *) skb->data;
-
struct a2mp_physlink_rsp rsp;
struct hci_dev *hdev;
struct hci_conn *hcon;
@@ -475,6 +483,8 @@ static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
BT_DBG("local_id %d, remote_id %d", req->local_id, req->remote_id);
+ memset(&rsp, 0, sizeof(rsp));
+
rsp.local_id = req->remote_id;
rsp.remote_id = req->local_id;
@@ -553,6 +563,8 @@ static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
BT_DBG("local_id %d remote_id %d", req->local_id, req->remote_id);
+ memset(&rsp, 0, sizeof(rsp));
+
rsp.local_id = req->remote_id;
rsp.remote_id = req->local_id;
rsp.status = A2MP_STATUS_SUCCESS;
@@ -675,6 +687,8 @@ static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
if (err) {
struct a2mp_cmd_rej rej;
+ memset(&rej, 0, sizeof(rej));
+
rej.reason = cpu_to_le16(0);
hdr = (void *) skb->data;
@@ -898,6 +912,8 @@ void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
BT_DBG("%s mgr %p", hdev->name, mgr);
+ memset(&rsp, 0, sizeof(rsp));
+
rsp.id = hdev->id;
rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
@@ -995,6 +1011,8 @@ void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
if (!mgr)
return;
+ memset(&rsp, 0, sizeof(rsp));
+
hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
if (!hs_hcon) {
rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
@@ -1027,6 +1045,8 @@ void a2mp_discover_amp(struct l2cap_chan *chan)
mgr->bredr_chan = chan;
+ memset(&req, 0, sizeof(req));
+
req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
req.ext_feat = 0;
a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);
--
2.26.2
From MAILER-DAEMON Thu Oct 15 15:17:31 2020
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH 2/4] Bluetooth: L2CAP: Fix calling sk_filter on non-socket based channel
Date: Thu, 06 Aug 2020 11:17:12 -0700
Message-Id: <20200806181714.3216076-2-luiz.dentz@gmail.com>
In-Reply-To: <20200806181714.3216076-1-luiz.dentz@gmail.com>
References: <20200806181714.3216076-1-luiz.dentz@gmail.com>
Sender: linux-bluetooth-owner@vger.kernel.org
List-ID: <linux-bluetooth.vger.kernel.org>
X-Mailing-List: linux-bluetooth@vger.kernel.org
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Only sockets will have the chan->data set to an actual sk, channels
like A2MP would have its own data which would likely cause a crash when
calling sk_filter, in order to fix this a new callback has been
introduced so channels can implement their own filtering if necessary.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
include/net/bluetooth/l2cap.h | 2 ++
net/bluetooth/l2cap_core.c | 7 ++++---
net/bluetooth/l2cap_sock.c | 14 ++++++++++++++
3 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index bc5e9fbc3853..61800a7b6192 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -666,6 +666,8 @@ struct l2cap_ops {
struct sk_buff *(*alloc_skb) (struct l2cap_chan *chan,
unsigned long hdr_len,
unsigned long len, int nb);
+ int (*filter) (struct l2cap_chan * chan,
+ struct sk_buff *skb);
};
struct l2cap_conn {
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index a4458c07b5e5..4a6b5e40e5e4 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -7301,9 +7301,10 @@ static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb)
goto drop;
}
- if ((chan->mode == L2CAP_MODE_ERTM ||
- chan->mode == L2CAP_MODE_STREAMING) && sk_filter(chan->data, skb))
- goto drop;
+ if (chan->ops->filter) {
+ if (chan->ops->filter(chan, skb))
+ goto drop;
+ }
if (!control->sframe) {
int err;
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index e1a3e66b1754..79b4c01c515b 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -1663,6 +1663,19 @@ static void l2cap_sock_suspend_cb(struct l2cap_chan *chan)
sk->sk_state_change(sk);
}
+static int l2cap_sock_filter(struct l2cap_chan *chan, struct sk_buff *skb)
+{
+ struct sock *sk = chan->data;
+
+ switch (chan->mode) {
+ case L2CAP_MODE_ERTM:
+ case L2CAP_MODE_STREAMING:
+ return sk_filter(sk, skb);
+ }
+
+ return 0;
+}
+
static const struct l2cap_ops l2cap_chan_ops = {
.name = "L2CAP Socket Interface",
.new_connection = l2cap_sock_new_connection_cb,
@@ -1678,6 +1691,7 @@ static const struct l2cap_ops l2cap_chan_ops = {
.get_sndtimeo = l2cap_sock_get_sndtimeo_cb,
.get_peer_pid = l2cap_sock_get_peer_pid_cb,
.alloc_skb = l2cap_sock_alloc_skb_cb,
+ .filter = l2cap_sock_filter,
};
static void l2cap_sock_destruct(struct sock *sk)
--
2.26.2
From MAILER-DAEMON Thu Oct 15 15:17:31 2020
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH 3/4] Bluetooth: Disable High Speed by default
Date: Thu, 06 Aug 2020 11:17:13 -0700
Message-Id: <20200806181714.3216076-3-luiz.dentz@gmail.com>
In-Reply-To: <20200806181714.3216076-1-luiz.dentz@gmail.com>
References: <20200806181714.3216076-1-luiz.dentz@gmail.com>
Sender: linux-bluetooth-owner@vger.kernel.org
List-ID: <linux-bluetooth.vger.kernel.org>
X-Mailing-List: linux-bluetooth@vger.kernel.org
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Bluetooth High Speed requires hardware support which is very uncommon
nowadays since HS has not pickup interest by the industry.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
net/bluetooth/Kconfig | 1 -
1 file changed, 1 deletion(-)
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index e2497d764e97..64e669acd42f 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -64,7 +64,6 @@ source "net/bluetooth/hidp/Kconfig"
config BT_HS
bool "Bluetooth High Speed (HS) features"
depends on BT_BREDR
- default y
help
Bluetooth High Speed includes support for off-loading
Bluetooth connections via 802.11 (wifi) physical layer
--
2.26.2
From MAILER-DAEMON Thu Oct 15 15:17:31 2020
From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH 4/4] Bluetooth: MGMT: Fix not checking if BT_HS is enabled
Date: Thu, 06 Aug 2020 11:17:14 -0700
Message-Id: <20200806181714.3216076-4-luiz.dentz@gmail.com>
In-Reply-To: <20200806181714.3216076-1-luiz.dentz@gmail.com>
References: <20200806181714.3216076-1-luiz.dentz@gmail.com>
Sender: linux-bluetooth-owner@vger.kernel.org
List-ID: <linux-bluetooth.vger.kernel.org>
X-Mailing-List: linux-bluetooth@vger.kernel.org
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This checks if BT_HS is enabled relecting it on MGMT_SETTING_HS instead
of always reporting it as supported.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
net/bluetooth/mgmt.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 5bbe71002fb9..5758ccb524ef 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -782,7 +782,8 @@ static u32 get_supported_settings(struct hci_dev *hdev)
if (lmp_ssp_capable(hdev)) {
settings |= MGMT_SETTING_SSP;
- settings |= MGMT_SETTING_HS;
+ if (IS_ENABLED(CONFIG_BT_HS))
+ settings |= MGMT_SETTING_HS;
}
if (lmp_sc_capable(hdev))
@@ -1815,6 +1816,10 @@ static int set_hs(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
bt_dev_dbg(hdev, "sock %p", sk);
+ if (!IS_ENABLED(CONFIG_BT_HS))
+ return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS,
+ MGMT_STATUS_NOT_SUPPORTED);
+
status = mgmt_bredr_support(hdev);
if (status)
return mgmt_cmd_status(sk, hdev->id, MGMT_OP_SET_HS, status);
--
2.26.2

8
kernel.spec
View File

@ -80,7 +80,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 300
%global baserelease 301
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -891,6 +891,9 @@ Patch120: iommu-tegra-smmu-Fix-TLB-line-for-Tegra210.patch
# CVE-2020-16119 rhbz 1886374 1888083
Patch121: CVE-2020-16119-DCCP-CCID-structure-use-after-free.patch
# CVE-2020-12351 CVE-2020-12352 rhbz 1886521 1888439 1886529 1888440
Patch122: bluetooth_cves.patch
# END OF PATCH DEFINITIONS
%endif
@ -3004,6 +3007,9 @@ fi
#
#
%changelog
* Thu Oct 15 2020 Justin M. Forbes <jforbes@fedoraproject.org> - 5.8.15-301
- Fix BleedingTooth CVE-2020-12351 CVE-2020-12352 (rhbz 1886521 1888439 1886529 1888440)
* Wed Oct 14 11:29:34 CDT 2020 Justin M. Forbes <jforbes@fedoraproject.org> - 5.8.15-300
- Linux v5.8.15
- Fix CVE-2020-16119 (rhbz 1886374 1888083)