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 |