GSD-2021-21002
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
In Phoenix Contact FL COMSERVER UNI in versions < 2.40 a invalid Modbus exception response can lead to a temporary denial of service.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-21002",
"description": "In Phoenix Contact FL COMSERVER UNI in versions \u003c 2.40 a invalid Modbus exception response can lead to a temporary denial of service.",
"id": "GSD-2021-21002"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-21002"
],
"details": "In Phoenix Contact FL COMSERVER UNI in versions \u003c 2.40 a invalid Modbus exception response can lead to a temporary denial of service.",
"id": "GSD-2021-21002",
"modified": "2023-12-13T01:23:10.574470Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "info@cert.vde.com",
"DATE_PUBLIC": "2021-06-23T10:00:00.000Z",
"ID": "CVE-2021-21002",
"STATE": "PUBLIC",
"TITLE": "Denial of Service in Phoenix Contact FL COMSERVER UNI products"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "FL COMSERVER",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "UNI 232/422/485 (2313452)",
"version_value": "2.40"
},
{
"version_affected": "\u003c",
"version_name": "UNI 232/422/485-T (2904817)",
"version_value": "2.40"
}
]
}
}
]
},
"vendor_name": "Phoenix Contact"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "This vulnerability was found by Petri Tuomio and reported to PHOENIX CONTACT by Waertsilae PSIRT. PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication."
}
],
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"data_version": "4.0",
"description": {
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"value": "In Phoenix Contact FL COMSERVER UNI in versions \u003c 2.40 a invalid Modbus exception response can lead to a temporary denial of service."
}
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},
"generator": {
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},
"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-772 Missing Release of Resource after Effective Lifetime"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://cert.vde.com/en-us/advisories/vde-2021-022",
"refsource": "CONFIRM",
"url": "https://cert.vde.com/en-us/advisories/vde-2021-022"
}
]
},
"solution": [
{
"lang": "eng",
"value": "Upgrade to the latest firmware, fixed firmware includes versions \u003e= 2.41."
}
],
"source": {
"advisory": "VDE-2021-022",
"defect": [
"VDE-2021-022"
],
"discovery": "EXTERNAL"
}
},
"nvd.nist.gov": {
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"nodes": [
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{
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"cpe_name": [],
"versionEndExcluding": "2.40",
"vulnerable": true
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"cve": {
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"ID": "CVE-2021-21002"
},
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"description": {
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"value": "In Phoenix Contact FL COMSERVER UNI in versions \u003c 2.40 a invalid Modbus exception response can lead to a temporary denial of service."
}
]
},
"problemtype": {
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"tags": [
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},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"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,
"severity": "MEDIUM",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"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
}
},
"lastModifiedDate": "2021-07-01T19:43Z",
"publishedDate": "2021-06-25T19:15Z"
}
}
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
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Nomenclature
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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.
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.
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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.
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