DNS misconfiguration in Zyxel NBG7510 home router

1) Improper Authorization

EUVDB-ID: #VU70458

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-38546

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to a DNS misconfiguration. A remote non-authenticated attacker can perform DNS-related attacks, such as DNS tunneling or DNS amplification attacks, by using the open DNS resolver when the device is switched to the AP mode.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NBG7510: before 1.00(ABZY.3)C0

External links

http://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-dns-misconfiguration-in-nbg7510-home-router

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.