Multiple vulnerabilities in Avahi

Published: 2023-11-20

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-38473 CVE-2023-38472
CWE-ID	CWE-617
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Avahi Universal components / Libraries / Libraries used by multiple products
Vendor	avahi.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Reachable Assertion

EUVDB-ID: #VU83304

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-38473

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion within the avahi_alternative_host_name() function. A local user can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Avahi: 0.1 - 0.8

External links

http://access.redhat.com/security/cve/CVE-2023-38473
http://bugzilla.redhat.com/show_bug.cgi?id=2191694

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.

2) Reachable Assertion

EUVDB-ID: #VU83303