Revision of Architecture Guides

[AGL/documentation.git] / docs / 2_Architecture_Guides / 2.2_Security_Blueprint / 5_Platform / 1.2.5.3_SystemBus.md

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----
-title: SystemBus
----
-
-# 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 -->