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[email protected]CVE-2023-4474

HistoryNov 30, 2023 - 2:15 a.m.

CVE-2023-4474

2023-11-3002:15:43

CWE-78

[email protected]

web.nvd.nist.gov

zyxel

nas326

nas542

firmware

os command execution

security vulnerability

cve-2023-4474

wsgi server

nvd

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.5 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

41.7%

JSON

The improper neutralization of special elements in the WSGI server of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted URL to a vulnerable device.

Affected configurations

NVD

Node

zyxelnas326_firmwareRange≤5.21\(aazf.14\)c0

AND

zyxelnas326Match-

Node

zyxelnas542_firmwareRange≤5.21\(abag.11\)c0

AND

zyxelnas542Match-

CPENameOperatorVersion
zyxel:nas326_firmwarezyxel nas326 firmwarele5.21\(aazf.14\)c0

CPE	Name	Operator	Version
zyxel:nas326_firmware	zyxel nas326 firmware	le	5.21\(aazf.14\)c0

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "NAS326 firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "V5.21(AAZF.14)C0"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "NAS542 firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "V5.21(ABAG.11)C0"
      }
    ]
  }
]

References

bugprove.com/knowledge-hub/cve-2023-4473-and-cve-2023-4474-authentication-bypass-and-multiple-blind-os-command-injection-vulnerabilities-in-zyxel-s-nas-326-devices/

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-products