CVE-2021-4029 - Vulnerability Details - OpenCVE

Description

A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.

Published: 2022-02-22

Score: 8.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Zyxel

ARMOR Z2 (NBG6817) firmware

affected

Version	Status	Constraints
`1.00(ABCS.10)C0`	affected	—

Zyxel

ARMOR Z1 (NBG6816) firmware

affected

Version	Status	Constraints
`1.00(AAWB.10)C0`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:zyxel:nbg6816_firmware:1.00\(aawb.10\)c0:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg6816:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:zyxel:nbg6817_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg6817:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-33930	A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Adjacent Network

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.00603.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml

History

No history.

Subscriptions

Zyxel Nbg6816 Nbg6816 Firmware Nbg6817 Nbg6817 Firmware

MITRE

Status: PUBLISHED

Assigner: Zyxel

Published: 2022-02-22T14:25:14.000Z

Updated: 2024-08-03T17:16:03.566Z

Reserved: 2021-11-29T00:00:00.000Z

Link: CVE-2021-4029

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-02-24T15:15:25.150

Modified: 2024-11-21T06:36:45.207

Link: CVE-2021-4029

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-78

{"containers": {"cna": {"affected": [{"product": "ARMOR Z2 (NBG6817) firmware", "vendor": "Zyxel", "versions": [{"status": "affected", "version": "1.00(ABCS.10)C0"}]}, {"product": "ARMOR Z1 (NBG6816) firmware", "vendor": "Zyxel", "versions": [{"status": "affected", "version": "1.00(AAWB.10)C0"}]}], "descriptions": [{"lang": "en", "value": "A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-02-22T14:25:14.000Z", "orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f", "shortName": "Zyxel"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@zyxel.com.tw", "ID": "CVE-2021-4029", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "ARMOR Z2 (NBG6817) firmware", "version": {"version_data": [{"version_value": "1.00(ABCS.10)C0"}]}}, {"product_name": "ARMOR Z1 (NBG6816) firmware", "version": {"version_data": [{"version_value": "1.00(AAWB.10)C0"}]}}]}, "vendor_name": "Zyxel"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface."}]}, "impact": {"cvss": {"baseScore": "8.8", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}]}, "references": {"reference_data": [{"name": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml", "refsource": "CONFIRM", "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:16:03.566Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"}]}]}, "cveMetadata": {"assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f", "assignerShortName": "Zyxel", "cveId": "CVE-2021-4029", "datePublished": "2022-02-22T14:25:14.000Z", "dateReserved": "2021-11-29T00:00:00.000Z", "dateUpdated": "2024-08-03T17:16:03.566Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nbg6816_firmware:1.00\\(aawb.10\\)c0:*:*:*:*:*:*:*", "matchCriteriaId": "51FE7589-8B85-40D9-A361-ECB2DC902D72", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nbg6816:-:*:*:*:*:*:*:*", "matchCriteriaId": "DEBACD2B-7C99-437F-B5C7-0EEA387DFE78", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nbg6817_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "7A4183C2-A488-4A80-AFDD-3CBC90D912D0", "versionEndExcluding": "1.00\\(abcs.11\\)c0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nbg6817:-:*:*:*:*:*:*:*", "matchCriteriaId": "1DB033C4-F082-46B1-985C-4FDFD62FFC70", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "descriptions": [{"lang": "en", "value": "A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface."}, {"lang": "es", "value": "Una vulnerabilidad de inyecci\u00f3n de comandos en el programa CGI del firmware Zyxel ARMOR Z1/Z2 podr\u00eda permitir a un atacante ejecutar comandos arbitrarios del sistema operativo por medio de una interfaz LAN"}], "id": "CVE-2021-4029", "lastModified": "2024-11-21T06:36:45.207", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 8.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 6.5, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security@zyxel.com.tw", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-02-24T15:15:25.150", "references": [{"source": "security@zyxel.com.tw", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml"}], "sourceIdentifier": "security@zyxel.com.tw", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security@zyxel.com.tw", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-78"}], "source": "nvd@nist.gov", "type": "Primary"}]}