Out-of-bounds read in Linux D-Bus Message Broker - CVE-2022-31212

Vulnerability identifier: #VU67527

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-2022-31212

CWE-ID: CWE-125

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 boundary condition when parsing DBus service Exec line in c-uitl/c-shquote. A local user can pass specially crafted input to the service, trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Install updates 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