CVE-2021-27500 - Vulnerability Details - OpenCVE

Description

A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition.

Published: 2022-05-12

Score: 7.5 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

EIPStackGroup

OpENer EtherNet/IP

affected

Version	Status	Constraints
`unspecified`	affected	< Feb 10, 2021

Configuration 1 [-]

cpe:2.3:a:opener_project:opener:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

The maintainer of OpENer recommends those affected to apply the latest commits available.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-14254	A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00136.

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/EIPStackGroup/OpENer
https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02

History

Wed, 16 Apr 2025 17:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Opener Project Opener

MITRE

Status: PUBLISHED

Assigner: icscert

Published: 2022-05-12T19:20:00.000Z

Updated: 2025-04-16T16:22:11.255Z

Reserved: 2021-02-19T00:00:00.000Z

Link: CVE-2021-27500

Vulnrichment

Updated: 2024-08-03T21:26:09.733Z

NVD

Status : Modified

Published: 2022-05-12T20:15:13.920

Modified: 2024-11-21T05:58:06.953

Link: CVE-2021-27500

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-617

{"containers": {"cna": {"affected": [{"product": "OpENer EtherNet/IP", "vendor": "EIPStackGroup", "versions": [{"lessThan": "Feb 10, 2021", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "Tal Keren and Sharon Brizinov of Claroty reported these vulnerabilities to CISA."}], "descriptions": [{"lang": "en", "value": "A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-617", "description": "CWE-617: Reachable Assertion", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-05-12T19:20:00.000Z", "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/EIPStackGroup/OpENer"}], "solutions": [{"lang": "en", "value": "The maintainer of OpENer recommends those affected to apply the latest commits available."}], "source": {"discovery": "EXTERNAL"}, "title": "EIPStackGroup OpENer Ethernet/IP Reachable Assertion", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "ics-cert@hq.dhs.gov", "ID": "CVE-2021-27500", "STATE": "PUBLIC", "TITLE": "EIPStackGroup OpENer Ethernet/IP Reachable Assertion"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "OpENer EtherNet/IP", "version": {"version_data": [{"version_affected": "<", "version_value": "Feb 10, 2021"}]}}]}, "vendor_name": "EIPStackGroup"}]}}, "credit": [{"lang": "eng", "value": "Tal Keren and Sharon Brizinov of Claroty reported these vulnerabilities to CISA."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-617: Reachable Assertion"}]}]}, "references": {"reference_data": [{"name": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02", "refsource": "CONFIRM", "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02"}, {"name": "https://github.com/EIPStackGroup/OpENer", "refsource": "CONFIRM", "url": "https://github.com/EIPStackGroup/OpENer"}]}, "solution": [{"lang": "en", "value": "The maintainer of OpENer recommends those affected to apply the latest commits available."}], "source": {"discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T21:26:09.733Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/EIPStackGroup/OpENer"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-04-16T15:56:17.694832Z", "id": "CVE-2021-27500", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-16T16:22:11.255Z"}}]}, "cveMetadata": {"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "assignerShortName": "icscert", "cveId": "CVE-2021-27500", "datePublished": "2022-05-12T19:20:00.000Z", "dateReserved": "2021-02-19T00:00:00.000Z", "dateUpdated": "2025-04-16T16:22:11.255Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02", "tags": ["x_refsource_CONFIRM", "x_transferred"]}, {"url": "https://github.com/EIPStackGroup/OpENer", "tags": ["x_refsource_CONFIRM", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T21:26:09.733Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-27500", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-04-16T15:56:17.694832Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-16T15:56:20.276Z"}}], "cna": {"title": "EIPStackGroup OpENer Ethernet/IP Reachable Assertion", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "value": "Tal Keren and Sharon Brizinov of Claroty reported these vulnerabilities to CISA."}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "EIPStackGroup", "product": "OpENer EtherNet/IP", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "Feb 10, 2021", "versionType": "custom"}]}], "solutions": [{"lang": "en", "value": "The maintainer of OpENer recommends those affected to apply the latest commits available."}], "references": [{"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/EIPStackGroup/OpENer", "tags": ["x_refsource_CONFIRM"]}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "descriptions": [{"lang": "en", "value": "A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-617", "description": "CWE-617: Reachable Assertion"}]}], "providerMetadata": {"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "shortName": "icscert", "dateUpdated": "2022-05-12T19:20:00.000Z"}, "x_legacyV4Record": {"credit": [{"lang": "eng", "value": "Tal Keren and Sharon Brizinov of Claroty reported these vulnerabilities to CISA."}], "impact": {"cvss": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, "source": {"discovery": "EXTERNAL"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "Feb 10, 2021", "version_affected": "<"}]}, "product_name": "OpENer EtherNet/IP"}]}, "vendor_name": "EIPStackGroup"}]}}, "solution": [{"lang": "en", "value": "The maintainer of OpENer recommends those affected to apply the latest commits available."}], "data_type": "CVE", "generator": {"engine": "Vulnogram 0.0.9"}, "references": {"reference_data": [{"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02", "name": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02", "refsource": "CONFIRM"}, {"url": "https://github.com/EIPStackGroup/OpENer", "name": "https://github.com/EIPStackGroup/OpENer", "refsource": "CONFIRM"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-617: Reachable Assertion"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-27500", "STATE": "PUBLIC", "TITLE": "EIPStackGroup OpENer Ethernet/IP Reachable Assertion", "ASSIGNER": "ics-cert@hq.dhs.gov"}}}}, "cveMetadata": {"cveId": "CVE-2021-27500", "state": "PUBLISHED", "dateUpdated": "2025-04-16T16:22:11.255Z", "dateReserved": "2021-02-19T00:00:00.000Z", "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6", "datePublished": "2022-05-12T19:20:00.000Z", "assignerShortName": "icscert"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:opener_project:opener:*:*:*:*:*:*:*:*", "matchCriteriaId": "1EE035AE-99DF-4AA0-B75F-679A6F57C194", "versionEndIncluding": "2.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "A specifically crafted packet sent by an attacker to EIPStackGroup OpENer EtherNet/IP commits and versions prior to Feb 10, 2021 may result in a denial-of-service condition."}, {"lang": "es", "value": "Un paquete espec\u00edficamente dise\u00f1ado enviado por un atacante a EIPStackGroup OpENer EtherNet/IP commits y versiones anteriores a 10 de febrero de 2021, puede resultar en una condici\u00f3n de denegaci\u00f3n de servicio"}], "id": "CVE-2021-27500", "lastModified": "2024-11-21T05:58:06.953", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "ics-cert@hq.dhs.gov", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-05-12T20:15:13.920", "references": [{"source": "ics-cert@hq.dhs.gov", "tags": ["Third Party Advisory"], "url": "https://github.com/EIPStackGroup/OpENer"}, {"source": "ics-cert@hq.dhs.gov", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/EIPStackGroup/OpENer"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-105-02"}], "sourceIdentifier": "ics-cert@hq.dhs.gov", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "ics-cert@hq.dhs.gov", "type": "Secondary"}]}