CVE-2023-34969

2023-06-0812:05:35

redhat.com

access.redhat.com

d-bus

vulnerability

denial of service

privileged monitoring connection

mitigation

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

0.001 Low

EPSS

Percentile

45.6%

JSON

An assertion failure vulnerability was found in D-Bus. This issue occurs when a privileged monitoring connection (dbus-monitor, busctl monitor, gdbus monitor, or similar) is active, and a message from the bus driver cannot be delivered to a client connection due to rules or outgoing message quota. If a privileged user with control over the dbus-daemon is monitoring the message bus traffic using the Monitoring clients like the dbus-monitor or busctl monitor interfaces, then an unprivileged local user with the ability to connect to the same dbus-daemon could send specially crafted request, causing a dbus-daemon to crash, resulting in a denial of service under some circumstances.

Mitigation

A mitigation for this vulnerability is to avoid attaching Monitoring clients to the system bus when they are not needed. If there are no Monitoring clients, then
the vulnerable code is not reached.