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Fencer Vulns
medium 6.5

CVE-2023-34969 json

D-Bus before 1.15.6 sometimes allows unprivileged users to crash dbus-daemon

published 2023-06-08 3 y ago modified 2026-10-15 25 d ago also EUVD-2023-39008 , JLSEC-2025-22

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia Dbus_jll 1.14.10+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • dbus Debian 12 1.14.8-1~deb12u1
  • dbus Debian 14, Debian 13 1.14.8-1

debian advisories DEBIAN-CVE-2023-34969

  • dbus Ubuntu Pro 16.04 LTS 1.10.6-1ubuntu3.6+esm3

ubuntu advisories UBUNTU-CVE-2023-34969

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dbus RHEL 9 1:1.12.20-7.el9_2.1
  • dbus-x11 RHEL 9 1:1.12.20-7.el9_2.1
  • dbus-libs RHEL 9 1:1.12.20-7.el9_2.1
  • dbus-tools RHEL 9 1:1.12.20-7.el9_2.1
  • dbus-common RHEL 9 1:1.12.20-7.el9_2.1
  • dbus-daemon RHEL 9 1:1.12.20-7.el9_2.1
  • dbus RHEL 8 1:1.12.8-24.el8_8.1
  • dbus-x11 RHEL 8 1:1.12.8-24.el8_8.1

red hat advisories RHSA-2023:5193RHSA-2023:4569RHSA-2023:4498

  • dbus-1 SLE Real Time 15 SP3, SLE Micro 5.2, SLE Micro 5.1 +2 more 1.12.2-150100.8.17.1
  • dbus-1-x11 SLE Real Time 15 SP3, SLE Micro 5.2, Manager Server 4.2 +1 more 1.12.2-150100.8.17.1
  • dbus-1 SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, SLE Micro 5.4 +4 more 1.12.2-150400.18.8.1
  • dbus-1-x11 SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, SLE Micro 5.4 +4 more 1.12.2-150400.18.8.1
  • dbus-1 SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.8.22-44.1
  • dbus-1-x11 SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.8.22-44.1

suse advisories SUSE-SU-2023:2879-1SUSE-SU-2023:2877-1SUSE-SU-2023:2876-1

  • dbus-1 openSUSE Tumbleweed 1.14.8-1.1

opensuse advisories openSUSE-SU-2024:12996-1

  • dbus AlmaLinux 9 1:1.12.20-7.el9_2.1
  • dbus-x11 AlmaLinux 9 1:1.12.20-7.el9_2.1
  • dbus-libs AlmaLinux 9 1:1.12.20-7.el9_2.1
  • dbus-tools AlmaLinux 9 1:1.12.20-7.el9_2.1
  • dbus-common AlmaLinux 9 1:1.12.20-7.el9_2.1
  • dbus-daemon AlmaLinux 9 1:1.12.20-7.el9_2.1
  • dbus AlmaLinux 8 1:1.12.8-24.el8_8.1
  • dbus-x11 AlmaLinux 8 1:1.12.8-24.el8_8.1

almalinux advisories ALSA-2023:4569ALSA-2023:4498

  • dbus Rocky Linux 9 1:1.12.20-7.el9_2.1
  • dbus Rocky Linux 8 1:1.12.8-24.el8_8.1

rocky linux advisories RLSA-2023:4569RLSA-2023:4498

  • dbus CBL-Mariner 2.0 1.15.6-1

azure linux advisories AZL-27178

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-34969 updated cvss 6.2

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

  • Red Hat Enterprise Linux 7 dbus, dbus-x11, dbus-libs, dbus-tests
    affected: workaround, no fix planned “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.”
  • Red Hat Enterprise Linux AppStream (v. 8) dbus-x11 1.12.8-24.el8_8.1
    fixed: vendor fix “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.” RHSA-2023:4498
  • Red Hat Enterprise Linux AppStream (v. 9) dbus-x11 1.12.20-7.el9_2.1, dbus-daemon 1.12.20-7.el9_2.1
    fixed: vendor fix “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.” RHSA-2023:4569
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) dbus-x11 1.12.8-18.el8_6.3
    fixed: vendor fix “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.” RHSA-2023:5193
  • Red Hat Enterprise Linux BaseOS (v. 8) dbus 1.12.8-24.el8_8.1, dbus-libs 1.12.8-24.el8_8.1, dbus-tools 1.12.8-24.el8_8.1, dbus-common 1.12.8-24.el8_8.1, dbus-daemon 1.12.8-24.el8_8.1
    fixed: vendor fix “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.” RHSA-2023:4498
  • Red Hat Enterprise Linux BaseOS (v. 9) dbus 1.12.20-7.el9_2.1, dbus-libs 1.12.20-7.el9_2.1, dbus-tools 1.12.20-7.el9_2.1, dbus-common 1.12.20-7.el9_2.1
    fixed: vendor fix “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.” RHSA-2023:4569
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) dbus 1.12.8-18.el8_6.3, dbus-libs 1.12.8-18.el8_6.3, dbus-tools 1.12.8-18.el8_6.3, dbus-common 1.12.8-18.el8_6.3, dbus-daemon 1.12.8-18.el8_6.3
    fixed: vendor fix “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.” RHSA-2023:5193
  • Red Hat Enterprise Linux 6 dbus, dbus-x11, dbus-libs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 6.5

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-24-046-11 updated cvss 6.5

Siemens SCALANCE XCM-/XRM-300

  • Siemens SCALANCE XCH328 (6GK5328-4TS01-2EC2) <V2.4 Siemens SCALANCE XCM324 (6GK5324-8TS01-2AC2) <V2.4 Siemens SCALANCE XCM328 (6GK5328-4TS01-2AC2) <V2.4 Siemens SCALANCE XCM332 (6GK5332-0GA01-2AC2) <V2.4 Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3) <V2.4 Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3) <V2.4
    +5 more products
    Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3) <V2.4 Siemens SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3) <V2.4 Siemens SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3) <V2.4 Siemens SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3) <V2.4 Siemens SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3) <V2.4
    affected: fixed in V2.4 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.freedesktop.org https://gitlab.freedesktop.org/dbus/dbus/-/issues/457 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Dbus_jll
<1.14.10+0
1.14.10+0

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.