Vulnerability identifier: #VU75467

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-22918

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ATP series
Hardware solutions / Routers for home users
USG FLEX series
Client/Desktop applications / Antivirus software/Personal firewalls
VPN series
Client/Desktop applications / Antivirus software/Personal firewalls
USG FLEX 50W
Hardware solutions / Firmware
USG20W-VPN
Hardware solutions / Firmware
NWA5123-AC HD
Hardware solutions / Firmware
WAC5302D-Sv2
Hardware solutions / Firmware
WAC6103D-I
Hardware solutions / Firmware
WAC6303D-S
Hardware solutions / Firmware
WAC6502D-E
Hardware solutions / Firmware
WAC6502D-S
Hardware solutions / Firmware
WAC6503D-S
Hardware solutions / Firmware
WAC6552D-S
Hardware solutions / Firmware
WAC6553D-E
Hardware solutions / Firmware
NWA110AX
Hardware solutions / Firmware
NWA1123ACv3
Hardware solutions / Firmware
NWA210AX
Hardware solutions / Firmware
WAC500
Hardware solutions / Firmware
WAC500H
Hardware solutions / Firmware
WAX510D
Hardware solutions / Firmware
WAX610D
Hardware solutions / Firmware
WAX650S
Hardware solutions / Firmware
NAP203
Hardware solutions / Routers & switches, VoIP, GSM, etc
NAP303
Hardware solutions / Routers & switches, VoIP, GSM, etc
NAP353
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA1123-AC-PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA220AX-6E
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA50AX
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA50AX-PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA90AX
Hardware solutions / Routers & switches, VoIP, GSM, etc
NWA90AX-PRO
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX620D-6E
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX630S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX640S-6E
Hardware solutions / Routers & switches, VoIP, GSM, etc
WAX655E
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: ZyXEL Communications Corp.

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in the CGI program. A remote user can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ATP series: 4.32 - 5.35

USG FLEX series: 4.50 - 5.35

USG FLEX 50W: 4.16 - 5.35

USG20W-VPN: 4.16 - 5.35

VPN series: 4.30 - 5.35

NAP203: 6.28(ABFA.0)

NAP303: 6.28(ABEX.0)

NAP353: 6.28(ABEY.0)

NWA1123-AC-PRO: 6.28(ABHD.0)

NWA5123-AC HD: 6.25(ABIM.9)

WAC5302D-Sv2: 6.25(ABVZ.9)

WAC6103D-I: 6.28(AAXH.0)

WAC6303D-S: 6.25(ABGL.9)

WAC6502D-E: 6.28(AASD.0)

WAC6502D-S: 6.28(AASE.0)

WAC6503D-S: 6.28(AASF.0)

WAC6552D-S: 6.28(ABIO.0)

WAC6553D-E: 6.28(AASG.0)

NWA110AX: 6.50(ABTG.2)

NWA1123ACv3: 6.50(ABVT.0)

NWA210AX: 6.50(ABTD.2)

NWA220AX-6E: 6.50(ACCO.2)

NWA50AX: 6.29(ABYW.1)

NWA50AX-PRO: 6.50(ACGE.0)

NWA90AX: 6.29(ACCV.1)

NWA90AX-PRO: 6.50(ACGF.0)

WAC500: 6.50(ABVS.0)

WAC500H: 6.50(ABWA.0)

WAX510D: 6.50(ABTF.2)

WAX610D: 6.50(ABTE.2)

WAX620D-6E: 6.50(ACCN.2)

WAX630S: 6.50(ABZD.2)

WAX640S-6E: 6.50(ACCM.2)

WAX650S: 6.50(ABRM.2)

WAX655E: 6.50(ACDO.2)

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External links
http://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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