--- /dev/null
+---
+edit_link: ''
+title: SystemBus
+origin_url: >-
+ https://raw.githubusercontent.com/automotive-grade-linux/docs-sources/master/docs/security-blueprint/part-5/3-SystemBus.md
+---
+
+<!-- WARNING: This file is generated by fetch_docs.js using /home/boron/Documents/AGL/docs-webtemplate/site/_data/tocs/architecture/master/security_blueprint-security-blueprint-book.yml -->
+
+# D-Bus
+
+D-Bus is a well-known **IPC** (Inter-Process Communication) protocol (and
+daemon) that helps applications to talk to each other. The use of D-Bus is great
+because it allows to implement discovery and signaling.
+
+The D-Bus session is by default addressed by environment variable
+`DBUS_SESSION_BUS_ADDRESS`. Using **systemd** variable `DBUS_SESSION_BUS_ADDRESS`
+is automatically set for user sessions. D-Bus usage is linked to permissions.
+
+D-Bus has already had several [security issues](https://www.cvedetails.com/vulnerability-list/vendor_id-13442/D-bus-Project.html)
+(mostly **DoS** issues), to allow applications to keep talking to each other.
+It is important to protect against this type of attack to keep the system more
+stable.
+
+
+<!-- section-config -->
+
+Domain | Object | Recommendations
+--------------- | -------------- | ------------------------------------
+Platform-DBus-1 | Security model | Use D-Bus as IPC.
+Platform-DBus-2 | Security model | Apply D-BUS security patches: [D-Bus CVE](https://www.cvedetails.com/vulnerability-list/vendor_id-13442/D-bus-Project.html)
+
+<!-- end-section-config -->