bluez5: fix out-of-bounds access in SDP server (CVE-2017-1000250)

All versions of the SDP server in BlueZ 5.46 and earlier are vulnerable to an
information disclosure vulnerability which allows remote attackers to obtain
sensitive information from the bluetoothd process memory. This vulnerability
lies in the processing of SDP search attribute requests.

(From OE-Core rev: d25716ceb3ffcdfcfa54516596bd94bf5c050bac)

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

diff --git a/meta/recipes-connectivity/bluez5/bluez5.inc b/meta/recipes-connectivity/bluez5/bluez5.inc
index ccb10aaad9a1d9a41591076d79f01211094c6383..882873a486e230efbd0014535f7fb21ae23fdd3a 100644 (file)
--- a/meta/recipes-connectivity/bluez5/bluez5.inc
+++ b/meta/recipes-connectivity/bluez5/bluez5.inc
@@ -24,6 +24,7 @@ SRC_URI = "\
     file://run-ptest \
     ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '', 'file://0001-Allow-using-obexd-without-systemd-in-the-user-sessio.patch', d)} \
     file://0001-tests-add-a-target-for-building-tests-without-runnin.patch \
+    file://cve-2017-1000250.patch \
 "
 S = "${WORKDIR}/bluez-${PV}"
 

diff --git a/meta/recipes-connectivity/bluez5/bluez5/cve-2017-1000250.patch b/meta/recipes-connectivity/bluez5/bluez5/cve-2017-1000250.patch
new file mode 100644 (file)
index 0000000..9fac961
--- /dev/null
+++ b/meta/recipes-connectivity/bluez5/bluez5/cve-2017-1000250.patch
@@ -0,0 +1,34 @@
+All versions of the SDP server in BlueZ 5.46 and earlier are vulnerable to an
+information disclosure vulnerability which allows remote attackers to obtain
+sensitive information from the bluetoothd process memory. This vulnerability
+lies in the processing of SDP search attribute requests.
+
+CVE: CVE-2017-1000250
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+From 9e009647b14e810e06626dde7f1bb9ea3c375d09 Mon Sep 17 00:00:00 2001
+From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
+Date: Wed, 13 Sep 2017 10:01:40 +0300
+Subject: sdp: Fix Out-of-bounds heap read in service_search_attr_req function
+
+Check if there is enough data to continue otherwise return an error.
+---
+ src/sdpd-request.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/sdpd-request.c b/src/sdpd-request.c
+index 1eefdce..318d044 100644
+--- a/src/sdpd-request.c
++++ b/src/sdpd-request.c
+@@ -917,7 +917,7 @@ static int service_search_attr_req(sdp_req_t *req, sdp_buf_t *buf)
+       } else {
+               /* continuation State exists -> get from cache */
+               sdp_buf_t *pCache = sdp_get_cached_rsp(cstate);
+-              if (pCache) {
++              if (pCache && cstate->cStateValue.maxBytesSent < pCache->data_size) {
+                       uint16_t sent = MIN(max, pCache->data_size - cstate->cStateValue.maxBytesSent);
+                       pResponse = pCache->data;
+                       memcpy(buf->data, pResponse + cstate->cStateValue.maxBytesSent, sent);
+-- 
+cgit v1.1