CVE-2023-34969
Published: 8 June 2023
D-Bus before 1.15.6 sometimes allows unprivileged users to crash dbus-daemon. If a privileged user with control over the dbus-daemon is using the org.freedesktop.DBus.Monitoring interface to monitor message bus traffic, then an unprivileged user with the ability to connect to the same dbus-daemon can cause a dbus-daemon crash under some circumstances via an unreplyable message. When done on the well-known system bus, this is a denial-of-service vulnerability. The fixed versions are 1.12.28, 1.14.8, and 1.15.6.
Notes
Author | Note |
---|---|
mdeslaur | This is only an issue if a privileged user is currently using a debugging tool, and only causes a DoS, so setting priority to low. 1.8.x and older are not affected. |
eslerm | addressed in b159849e ("bus: Assign a serial number for messages from the driver") |
eslerm | MR 408 contains fix, reproducer, and errata |
Priority
Status
Package | Release | Status |
---|---|---|
dbus Launchpad, Ubuntu, Debian |
trusty |
Not vulnerable
(code not present)
|
xenial |
Released
(1.10.6-1ubuntu3.6+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
bionic |
Needed
|
|
focal |
Needed
|
|
jammy |
Needed
|
|
kinetic |
Ignored
(end of life, was needed)
|
|
lunar |
Needed
|
|
upstream |
Released
(1.12.28,1.14.8,1.15.6)
|
|
Patches: upstream: https://gitlab.freedesktop.org/dbus/dbus/-/merge_requests/408 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |