CVE-2023-20200 (GCVE-0-2023-20200)
Vulnerability from cvelistv5 – Published: 2023-08-23 18:20 – Updated: 2025-07-01 13:57
VLAI
EPSS
VEX
Summary
A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-01 13:56 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco Unified Computing System (Managed) |
Affected:
3.1(1e)
Affected: 3.1(1g) Affected: 3.1(1h) Affected: 3.1(1k) Affected: 3.1(1l) Affected: 3.1(2b) Affected: 3.1(2c) Affected: 3.1(2e) Affected: 3.1(2f) Affected: 3.1(2g) Affected: 3.1(2h) Affected: 3.1(3a) Affected: 3.1(3b) Affected: 3.1(3c) Affected: 3.1(3d) Affected: 3.1(3e) Affected: 3.1(3f) Affected: 3.1(3h) Affected: 3.1(3j) Affected: 3.1(3k) Affected: 3.1(2d) Affected: 3.1(3l) Affected: 3.2(1d) Affected: 3.2(2b) Affected: 3.2(2c) Affected: 3.2(2d) Affected: 3.2(2e) Affected: 3.2(2f) Affected: 3.2(3a) Affected: 3.2(3b) Affected: 3.2(3d) Affected: 3.2(3e) Affected: 3.2(3g) Affected: 3.2(3h) Affected: 3.2(3i) Affected: 3.2(3j) Affected: 3.2(3k) Affected: 3.2(3l) Affected: 3.2(3n) Affected: 3.2(3o) Affected: 3.2(3p) Affected: 4.0(1a) Affected: 4.0(1b) Affected: 4.0(1c) Affected: 4.0(1d) Affected: 4.0(2a) Affected: 4.0(2b) Affected: 4.0(2d) Affected: 4.0(2e) Affected: 4.0(4b) Affected: 4.0(4c) Affected: 4.0(4d) Affected: 4.0(4e) Affected: 4.0(4f) Affected: 4.0(4g) Affected: 4.0(4h) Affected: 4.0(4a) Affected: 4.0(4i) Affected: 4.0(4k) Affected: 4.0(4l) Affected: 4.0(4m) Affected: 4.0(4n) Affected: 4.0(4o) Affected: 4.1(1a) Affected: 4.1(1b) Affected: 4.1(1c) Affected: 4.1(2a) Affected: 4.1(1d) Affected: 4.1(1e) Affected: 4.1(2b) Affected: 4.1(3a) Affected: 4.1(3b) Affected: 4.1(2c) Affected: 4.1(3d) Affected: 4.1(3c) Affected: 4.1(3e) Affected: 4.1(3f) Affected: 4.1(3h) Affected: 4.1(3i) Affected: 4.1(3j) Affected: 4.1(3k) Affected: 4.2(1d) Affected: 4.2(1c) Affected: 4.2(1f) Affected: 4.2(1i) Affected: 4.2(1k) Affected: 4.2(1l) Affected: 4.2(1m) Affected: 4.2(2a) Affected: 4.2(2c) Affected: 4.2(1n) Affected: 4.2(2d) Affected: 4.2(3b) Affected: 4.2(2e) |
guessed | |
| Cisco | Cisco Firepower Extensible Operating System (FXOS) |
Affected:
2.2.1.63
Affected: 2.2.1.66 Affected: 2.2.1.70 Affected: 2.2.2.17 Affected: 2.2.2.19 Affected: 2.2.2.24 Affected: 2.2.2.26 Affected: 2.2.2.28 Affected: 2.2.2.54 Affected: 2.2.2.60 Affected: 2.3.1.93 Affected: 2.3.1.91 Affected: 2.3.1.88 Affected: 2.3.1.75 Affected: 2.3.1.73 Affected: 2.3.1.66 Affected: 2.3.1.58 Affected: 2.3.1.56 |
guessed |
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"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 4.0,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-20200",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-07-01T13:56:35.670250Z",
"version": "2.0.3"
}
}
]
},
"published": "2023-08-23T19:15:08.020",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-835"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-732"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-05-28T22:33:15+00:00",
"cve": "CVE-2023-20200",
"id": "CVE-2023-20200",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2023-20200",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-20200.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T09:05:35.047Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO",
"tags": [
"x_transferred"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-20200",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-07-01T13:56:35.670250Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-07-01T13:57:30.785Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco Unified Computing System (Managed)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "3.1(1e)"
},
{
"status": "affected",
"version": "3.1(1g)"
},
{
"status": "affected",
"version": "3.1(1h)"
},
{
"status": "affected",
"version": "3.1(1k)"
},
{
"status": "affected",
"version": "3.1(1l)"
},
{
"status": "affected",
"version": "3.1(2b)"
},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "3.1(2f)"
},
{
"status": "affected",
"version": "3.1(2g)"
},
{
"status": "affected",
"version": "3.1(2h)"
},
{
"status": "affected",
"version": "3.1(3a)"
},
{
"status": "affected",
"version": "3.1(3b)"
},
{
"status": "affected",
"version": "3.1(3c)"
},
{
"status": "affected",
"version": "3.1(3d)"
},
{
"status": "affected",
"version": "3.1(3e)"
},
{
"status": "affected",
"version": "3.1(3f)"
},
{
"status": "affected",
"version": "3.1(3h)"
},
{
"status": "affected",
"version": "3.1(3j)"
},
{
"status": "affected",
"version": "3.1(3k)"
},
{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
"version": "3.2(1d)"
},
{
"status": "affected",
"version": "3.2(2b)"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "3.2(2d)"
},
{
"status": "affected",
"version": "3.2(2e)"
},
{
"status": "affected",
"version": "3.2(2f)"
},
{
"status": "affected",
"version": "3.2(3a)"
},
{
"status": "affected",
"version": "3.2(3b)"
},
{
"status": "affected",
"version": "3.2(3d)"
},
{
"status": "affected",
"version": "3.2(3e)"
},
{
"status": "affected",
"version": "3.2(3g)"
},
{
"status": "affected",
"version": "3.2(3h)"
},
{
"status": "affected",
"version": "3.2(3i)"
},
{
"status": "affected",
"version": "3.2(3j)"
},
{
"status": "affected",
"version": "3.2(3k)"
},
{
"status": "affected",
"version": "3.2(3l)"
},
{
"status": "affected",
"version": "3.2(3n)"
},
{
"status": "affected",
"version": "3.2(3o)"
},
{
"status": "affected",
"version": "3.2(3p)"
},
{
"status": "affected",
"version": "4.0(1a)"
},
{
"status": "affected",
"version": "4.0(1b)"
},
{
"status": "affected",
"version": "4.0(1c)"
},
{
"status": "affected",
"version": "4.0(1d)"
},
{
"status": "affected",
"version": "4.0(2a)"
},
{
"status": "affected",
"version": "4.0(2b)"
},
{
"status": "affected",
"version": "4.0(2d)"
},
{
"status": "affected",
"version": "4.0(2e)"
},
{
"status": "affected",
"version": "4.0(4b)"
},
{
"status": "affected",
"version": "4.0(4c)"
},
{
"status": "affected",
"version": "4.0(4d)"
},
{
"status": "affected",
"version": "4.0(4e)"
},
{
"status": "affected",
"version": "4.0(4f)"
},
{
"status": "affected",
"version": "4.0(4g)"
},
{
"status": "affected",
"version": "4.0(4h)"
},
{
"status": "affected",
"version": "4.0(4a)"
},
{
"status": "affected",
"version": "4.0(4i)"
},
{
"status": "affected",
"version": "4.0(4k)"
},
{
"status": "affected",
"version": "4.0(4l)"
},
{
"status": "affected",
"version": "4.0(4m)"
},
{
"status": "affected",
"version": "4.0(4n)"
},
{
"status": "affected",
"version": "4.0(4o)"
},
{
"status": "affected",
"version": "4.1(1a)"
},
{
"status": "affected",
"version": "4.1(1b)"
},
{
"status": "affected",
"version": "4.1(1c)"
},
{
"status": "affected",
"version": "4.1(2a)"
},
{
"status": "affected",
"version": "4.1(1d)"
},
{
"status": "affected",
"version": "4.1(1e)"
},
{
"status": "affected",
"version": "4.1(2b)"
},
{
"status": "affected",
"version": "4.1(3a)"
},
{
"status": "affected",
"version": "4.1(3b)"
},
{
"status": "affected",
"version": "4.1(2c)"
},
{
"status": "affected",
"version": "4.1(3d)"
},
{
"status": "affected",
"version": "4.1(3c)"
},
{
"status": "affected",
"version": "4.1(3e)"
},
{
"status": "affected",
"version": "4.1(3f)"
},
{
"status": "affected",
"version": "4.1(3h)"
},
{
"status": "affected",
"version": "4.1(3i)"
},
{
"status": "affected",
"version": "4.1(3j)"
},
{
"status": "affected",
"version": "4.1(3k)"
},
{
"status": "affected",
"version": "4.2(1d)"
},
{
"status": "affected",
"version": "4.2(1c)"
},
{
"status": "affected",
"version": "4.2(1f)"
},
{
"status": "affected",
"version": "4.2(1i)"
},
{
"status": "affected",
"version": "4.2(1k)"
},
{
"status": "affected",
"version": "4.2(1l)"
},
{
"status": "affected",
"version": "4.2(1m)"
},
{
"status": "affected",
"version": "4.2(2a)"
},
{
"status": "affected",
"version": "4.2(2c)"
},
{
"status": "affected",
"version": "4.2(1n)"
},
{
"status": "affected",
"version": "4.2(2d)"
},
{
"status": "affected",
"version": "4.2(3b)"
},
{
"status": "affected",
"version": "4.2(2e)"
}
]
},
{
"product": "Cisco Firepower Extensible Operating System (FXOS)",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "2.2.1.63"
},
{
"status": "affected",
"version": "2.2.1.66"
},
{
"status": "affected",
"version": "2.2.1.70"
},
{
"status": "affected",
"version": "2.2.2.17"
},
{
"status": "affected",
"version": "2.2.2.19"
},
{
"status": "affected",
"version": "2.2.2.24"
},
{
"status": "affected",
"version": "2.2.2.26"
},
{
"status": "affected",
"version": "2.2.2.28"
},
{
"status": "affected",
"version": "2.2.2.54"
},
{
"status": "affected",
"version": "2.2.2.60"
},
{
"status": "affected",
"version": "2.3.1.93"
},
{
"status": "affected",
"version": "2.3.1.91"
},
{
"status": "affected",
"version": "2.3.1.88"
},
{
"status": "affected",
"version": "2.3.1.75"
},
{
"status": "affected",
"version": "2.3.1.73"
},
{
"status": "affected",
"version": "2.3.1.66"
},
{
"status": "affected",
"version": "2.3.1.58"
},
{
"status": "affected",
"version": "2.3.1.56"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.\r\n\r Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-01-25T16:57:56.220Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO"
}
],
"source": {
"advisory": "cisco-sa-fp-ucsfi-snmp-dos-qtv69NAO",
"defects": [
"CSCwd38796",
"CSCwe12029",
"CSCvi80806"
],
"discovery": "EXTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2023-20200",
"datePublished": "2023-08-23T18:20:09.900Z",
"dateReserved": "2022-10-27T18:47:50.365Z",
"dateUpdated": "2025-07-01T13:57:36.701Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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
| 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.
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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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