NULL pointer dereference in Linux D-Bus Message Broker - CVE-2022-31213

Vulnerability identifier: #VU67528

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear

CVE-ID: CVE-2022-31213

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: Public exploit is available

Affected software:
Linux D-Bus Message Broker
Gentoo Linux
Amazon Linux AMI
Fedora
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Oracle Linux
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
dbus-broker
dbus-broker (Red Hat package)
dbus-broker-debuginfo
dbus-broker-debugsource
sys-apps/dbus-broker

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when handling a malformed XML config file. A local user can supply a specially crafted XML file to the service and perform a denial of service (DoS) attack.

Install update from vendor's website.

• https://sec-consult.com/vulnerability-lab/advisory/memory-corruption-vulnerabilities-dbus-broker/
• https://github.com/bus1/dbus-broker/compare/v30...v31