From 98826d0717fe831265256f996c9e90d15262bef1 Mon Sep 17 00:00:00 2001

From: Gopal Tiwari <gtiwari@redhat.com>

Date: Mon, 8 Jun 2020 19:54:24 +0530

Subject: [PATCH BlueZ 2/4] systemd: Add PrivateTmp and NoNewPrivileges options

From 4570164f0c90603bd07eb9e7c07e17bbafb5b5da Mon Sep 17 00:00:00 2001

From: Craig Andrews <candrews@integralblue.com>

Date: Wed, 13 Sep 2017 15:23:09 +0200

systemd: Add PrivateTmp and NoNewPrivileges options

PrivateTmp makes bluetoothd's /tmp and /var/tmp be inside a different

namespace. This is useful to secure access to temporary files of the

process.

NoNewPrivileges ensures that service process and all its children

can never gain new privileges through execve(), lowering the risk of

possible privilege escalations.

---

 src/bluetooth.service.in | 6 ++++++

 1 file changed, 6 insertions(+)

diff --git a/src/bluetooth.service.in b/src/bluetooth.service.in

index f9faaa452..7c2f60bb4 100644

--- a/src/bluetooth.service.in

+++ b/src/bluetooth.service.in

@@ -12,8 +12,14 @@ NotifyAccess=main

 #Restart=on-failure

 CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE

 LimitNPROC=1

+

+# Filesystem lockdown

 ProtectHome=true

 ProtectSystem=full

+PrivateTmp=true

+

+# Privilege escalation

+NoNewPrivileges=true

 [Install]

 WantedBy=bluetooth.target

-- 

2.21.1