Denial of service in Zyxel products

1) Improper Check for Unusual or Exceptional Conditions

EUVDB-ID: #VU71973

Risk: Medium

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

CVE-ID: CVE-2022-45854

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Exploit availability: No

Description

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

The vulnerability exists due to improper error handling. A remote attacker can send specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

NWA110AX: 6.45(ABTG.0)C0

NWA210AX: 6.45(ABTD.0)C0

WAX510D: 6.45(ABTF.0)C0

WAX610D: 6.45(ABTE.0)C0

WAX630S: 6.45(ABZD.0)C0

WAX650S: 6.45(ABRM.0)C0

External links

http://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-dos-vulnerability-of-aps

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.