Vulnerability identifier: #VU54661

Vulnerability risk: Low

CVSSv3.1: 5.4 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-36217

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Avahi
Universal components / Libraries / Libraries used by multiple products

Vendor: avahi.org

Description

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

The vulnerability exists due to a NULL pointer dereference error in the D-Bus interface. A local attacker can trigger denial of service conditions via the D-Bus interface or a "ping .local" command.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Avahi: 0.8

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External links
http://github.com/lathiat/avahi/commit/9d31939e55280a733d930b15ac9e4dda4497680c
http://bugzilla.suse.com/show_bug.cgi?id=1188083

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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.