Vulnerability-Lookup

CVE-2021-20739 (GCVE-0-2021-20739)

Vulnerability from cvelistv5 – Published: 2021-07-07 07:05 – Updated: 2024-08-03 17:53

Summary

WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S all versions allows an unauthenticated network-adjacent attacker to execute an arbitrary OS command via unspecified vectors.

Severity

8.8 (High)


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

CWE

OS Command Injection

Assigner

jpcert jpcert root

References

2 references

URL	Tags
https://www.elecom.co.jp/news/security/20210706-01/	x_refsource_MISC
https://jvn.jp/en/vu/JVNVU94260088/index.html	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
ELECOM CO.,LTD.	WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S	Affected: all versions	guessed

Show details on NVD website

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      "id": "CVE-2021-20739",
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      "product_status:known_not_affected": "1",
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  }
}

FKIE_CVE-2021-20739

Vulnerability from fkie_nvd - Published: 2021-07-07 08:15 - Updated: 2026-06-17 03:34

Severity

8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
vultures@jpcert.or.jp	https://jvn.jp/en/vu/JVNVU94260088/index.html	Third Party Advisory
vultures@jpcert.or.jp	https://www.elecom.co.jp/news/security/20210706-01/	Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://jvn.jp/en/vu/JVNVU94260088/index.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.elecom.co.jp/news/security/20210706-01/	Vendor Advisory

Impacted products

Vendor	Product	Version
elecom	wrc-300febk_firmware	*
elecom	wrc-300febk	-
elecom	wrc-f300nf_firmware	*
elecom	wrc-f300nf	-
elecom	wrc-733febk_firmware	*
elecom	wrc-733febk	-
elecom	wrh-300rd_firmware	*
elecom	wrh-300rd	-
elecom	wrh-300bk_firmware	*
elecom	wrh-300bk	-
elecom	wrh-300sv_firmware	*
elecom	wrh-300sv	-
elecom	wrh-300wh_firmware	*
elecom	wrh-300wh	-
elecom	wrh-h300wh_firmware	*
elecom	wrh-h300wh	-
elecom	wrh-h300bk_firmware	*
elecom	wrh-h300bk	-
elecom	wrh-300bk-s_firmware	*
elecom	wrh-300bk-s	-
elecom	wrh-300wh-s_firmware	*
elecom	wrh-300wh-s	-

JSON

To clipboard

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          "vendor": "ELECOM CO.,LTD.",
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              "version": "all versions"
            }
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          "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": "2021-07-07T08:15:07.813",
  "references": [
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      "tags": [
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    },
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      "tags": [
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      "url": "https://www.elecom.co.jp/news/security/20210706-01/"
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  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-78"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

GHSA-6G7G-H77W-72MH

Vulnerability from github – Published: 2022-05-24 19:07 – Updated: 2022-05-24 19:07

Details

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-20739"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-07-07T08:15:00Z",
    "severity": "HIGH"
  },
  "details": "WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S all versions allows an unauthenticated network-adjacent attacker to execute an arbitrary OS command via unspecified vectors.",
  "id": "GHSA-6g7g-h77w-72mh",
  "modified": "2022-05-24T19:07:09Z",
  "published": "2022-05-24T19:07:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20739"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/vu/JVNVU94260088/index.html"
    },
    {
      "type": "WEB",
      "url": "https://www.elecom.co.jp/news/security/20210706-01"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GSD-2021-20739

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Aliases

CVE-2021-20739

Aliases

CVE-2021-20739

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-20739",
    "description": "WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S all versions allows an unauthenticated network-adjacent attacker to execute an arbitrary OS command via unspecified vectors.",
    "id": "GSD-2021-20739"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-20739"
      ],
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      "id": "GSD-2021-20739",
      "modified": "2023-12-13T01:23:12.026129Z",
      "schema_version": "1.4.0"
    }
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            "baseScore": 5.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:P",
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          },
          "exploitabilityScore": 6.5,
          "impactScore": 6.4,
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            "attackVector": "ADJACENT_NETWORK",
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      "lastModifiedDate": "2021-07-10T02:43Z",
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  }
}

JVNDB-2021-001977

Vulnerability from jvndb - Published: 2021-07-07 05:03 - Updated:2021-07-12 07:04

Severity

6.3 (Medium) - cvssV3_0 - CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Summary

Multiple vulnerabilities in Elecom routers

Details

Multiple routers provided by ELECOM CO.,LTD. contain information disclosure and OS command injection vulnerabilities. Multiple routers provided by ELECOM CO.,LTD. contain multiple vulnerabilities listed below. WRC-1167FS-W, WRC-1167FS-B, WRC-1167FSA * Information disclosure (CWE-200) - CVE-2021-20738 WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, WRH-300WH-S * OS command injection (CWE-78) - CVE-2021-20739 Chuya Hayakawa and Katsuhiko Sato(a.k.a. goroh_kun) of 00One, Inc. reported this vulnerability to ELECOM CO.,LTD. and coordinated. ELECOM CO.,LTD. and JPCERT/CC published respective advisories in order to notify users of this vulnerability.

References

Type

URL

	JVN	https://jvn.jp/en/vu/JVNVU94260088/index.html
	CVE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20738
	CVE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20739
	NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-20738
	NVD	https://nvd.nist.gov/vuln/detail/CVE-2021-20739
	Information Exposure(CWE-200)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html
	OS Command Injection(CWE-78)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

	ELECOM CO.,LTD.	WRC-1167FS-B
	ELECOM CO.,LTD.	WRC-1167FS-W
	ELECOM CO.,LTD.	WRC-1167FSA
	ELECOM CO.,LTD.	WRC-300FEBK firmware
	ELECOM CO.,LTD.	WRC-733FEBK firmware
	ELECOM CO.,LTD.	WRC-F300NF firmware
	ELECOM CO.,LTD.	WRH-300BK-S firmware
	ELECOM CO.,LTD.	WRH-300BK firmware
	ELECOM CO.,LTD.	WRH-300RD firmware
	ELECOM CO.,LTD.	WRH-300SV firmware
	ELECOM CO.,LTD.	WRH-300WH-S firmwware
	ELECOM CO.,LTD.	WRH-300WH firmware
	ELECOM CO.,LTD.	WRH-H300BK firmware
	ELECOM CO.,LTD.	WRH-H300WH firmware

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2021/JVNDB-2021-001977.html",
  "dc:date": "2021-07-12T16:04+09:00",
  "dcterms:issued": "2021-07-07T14:03+09:00",
  "dcterms:modified": "2021-07-12T16:04+09:00",
  "description": "Multiple routers provided by ELECOM CO.,LTD. contain information disclosure and OS command injection vulnerabilities.\r\n\r\nMultiple routers provided by ELECOM CO.,LTD. contain multiple vulnerabilities listed below.\r\n\r\nWRC-1167FS-W, WRC-1167FS-B, WRC-1167FSA\r\n\r\n* Information disclosure (CWE-200) - CVE-2021-20738\r\n\r\nWRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, WRH-300WH-S\r\n\r\n* OS command injection (CWE-78) - CVE-2021-20739\r\n\r\nChuya Hayakawa and Katsuhiko Sato(a.k.a. goroh_kun) of 00One, Inc. reported this vulnerability to ELECOM CO.,LTD. and coordinated. ELECOM CO.,LTD. and JPCERT/CC published respective advisories in order to notify users of this vulnerability.",
  "link": "https://jvndb.jvn.jp/en/contents/2021/JVNDB-2021-001977.html",
  "sec:cpe": [
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      "#text": "cpe:/o:elecom:wrc-1167fs-b_firmware",
      "@product": "WRC-1167FS-B",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
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      "#text": "cpe:/o:elecom:wrc-1167fs-w_firmware",
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    },
    {
      "#text": "cpe:/o:elecom:wrh-300bk-s_firmware",
      "@product": "WRH-300BK-S firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-300bk_firmware",
      "@product": "WRH-300BK firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-300rd_firmware",
      "@product": "WRH-300RD firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-300sv_firmware",
      "@product": "WRH-300SV firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-300wh-s_firmware",
      "@product": "WRH-300WH-S firmwware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-300wh_firmware",
      "@product": "WRH-300WH firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-h300bk_firmware",
      "@product": "WRH-H300BK firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    },
    {
      "#text": "cpe:/o:elecom:wrh-h300wh_firmware",
      "@product": "WRH-H300WH firmware",
      "@vendor": "ELECOM CO.,LTD.",
      "@version": "2.2"
    }
  ],
  "sec:cvss": [
    {
      "@score": "5.8",
      "@severity": "Medium",
      "@type": "Base",
      "@vector": "AV:A/AC:L/Au:N/C:P/I:P/A:P",
      "@version": "2.0"
    },
    {
      "@score": "6.3",
      "@severity": "Medium",
      "@type": "Base",
      "@vector": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "@version": "3.0"
    }
  ],
  "sec:identifier": "JVNDB-2021-001977",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/vu/JVNVU94260088/index.html",
      "@id": "JVNVU#94260088",
      "@source": "JVN"
    },
    {
      "#text": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20738",
      "@id": "CVE-2021-20738",
      "@source": "CVE"
    },
    {
      "#text": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20739",
      "@id": "CVE-2021-20739",
      "@source": "CVE"
    },
    {
      "#text": "https://nvd.nist.gov/vuln/detail/CVE-2021-20738",
      "@id": "CVE-2021-20738",
      "@source": "NVD"
    },
    {
      "#text": "https://nvd.nist.gov/vuln/detail/CVE-2021-20739",
      "@id": "CVE-2021-20739",
      "@source": "NVD"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-200",
      "@title": "Information Exposure(CWE-200)"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-78",
      "@title": "OS Command Injection(CWE-78)"
    }
  ],
  "title": "Multiple vulnerabilities in Elecom routers"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2021-20739 (GCVE-0-2021-20739)

FKIE_CVE-2021-20739

GHSA-6G7G-H77W-72MH

GSD-2021-20739

JVNDB-2021-001977

Tags

Sightings

Nomenclature

Related by attack behaviour