Privilege escalation in Zyxel AP Configurator

1) Incorrect Privilege Assignment

EUVDB-ID: #VU62546

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-0556

CWE-ID: CWE-266 - Incorrect Privilege Assignment

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect permission assignment within installer to some directories, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

AP Configurator: 1.1.4

CPE2.3

• cpe:2.3:a:zyxel_communications_corp:ap_configurator:1.1.4:*:*:*:*:*:*:*

External links

https://www.zyxel.com/support/Zyxel-security-advisory-for-local-privilege-escalation-vulnerability-of-AP-Configurator.shtml
https://www.zerodayinitiative.com/advisories/ZDI-22-879/

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.