// For flags

CVE-2023-34969

dbus: dbus-daemon: assertion failure when a monitor is active and a message from the driver cannot be delivered

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

D-Bus en versiones anteriores a v1.15.6 a veces permite a usuarios sin privilegios bloquear el "dbus-daemon". Si un usuario privilegiado con control sobre "dbus-daemon" está usando la interfaz "org.freedesktop.DBus.Monitoring" para monitorizar el tráfico del bus de mensajes, entonces un usuario sin privilegios con la capacidad de conectarse al mismo "dbus-daemon" puede causar un fallo del "dbus-daemon" bajo algunas circunstancias a través de un mensaje sin respuesta. Cuando se hace en el bus del sistema conocido, se trata de una vulnerabilidad de denegación de servicio. Las versiones que corrigen esta vulnerabilidad son v1.12.28, v1.14.8 y v1.15.6.

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 <deny> 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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-06-08 CVE Reserved
  • 2023-06-08 CVE Published
  • 2024-06-14 EPSS Updated
  • 2024-08-02 CVE Updated
  • 2024-08-02 First Exploit
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-617: Reachable Assertion
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Freedesktop
Search vendor "Freedesktop"
 Dbus
Search vendor "Freedesktop" for product "Dbus"
 >= 1.12.0 < 1.12.28
Search vendor "Freedesktop" for product "Dbus" and version " >= 1.12.0 < 1.12.28"
-
Affected
Freedesktop
Search vendor "Freedesktop"
 Dbus
Search vendor "Freedesktop" for product "Dbus"
 >= 1.14.0 < 1.14.8
Search vendor "Freedesktop" for product "Dbus" and version " >= 1.14.0 < 1.14.8"
-
Affected
Freedesktop
Search vendor "Freedesktop"
 Dbus
Search vendor "Freedesktop" for product "Dbus"
 >= 1.15.0 < 1.15.6
Search vendor "Freedesktop" for product "Dbus" and version " >= 1.15.0 < 1.15.6"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 38
Search vendor "Fedoraproject" for product "Fedora" and version "38"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 10.0
Search vendor "Debian" for product "Debian Linux" and version "10.0"
-
Affected