Multiple vulnerabilities in Linux D-Bus Message Broker

Published: 2022-09-21

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2022-31213 CVE-2022-31212
CWE-ID	CWE-476 CWE-125
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Linux D-Bus Message Broker Universal components / Libraries / Libraries used by multiple products
Vendor	bus1

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU67528

Risk: Low

CVSSv3.1: 3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2022-31213

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: Yes

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux D-Bus Message Broker: 1 - 30

External links

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

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Out-of-bounds read

EUVDB-ID: #VU67527