CVE-2023-20071 (GCVE-0-2023-20071)
Vulnerability from cvelistv5 – Published: 2023-11-01 17:07 – Updated: 2024-08-02 08:57
VLAI
EPSS
VEX
Summary
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a flaw in the FTP module of the Snort detection engine. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and deliver a malicious payload.
Severity
5.8 (Medium)
CWE
- CWE-1039 - Automated Recognition Mechanism with Inadequate Detection or Handling of Adversarial Input Perturbations
Assigner
References
1 reference
Impacted products
4 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco Firepower Threat Defense Software |
Affected:
6.2.3
Affected: 6.2.3.1 Affected: 6.2.3.2 Affected: 6.2.3.3 Affected: 6.2.3.4 Affected: 6.2.3.5 Affected: 6.2.3.6 Affected: 6.2.3.7 Affected: 6.2.3.8 Affected: 6.2.3.10 Affected: 6.2.3.11 Affected: 6.2.3.9 Affected: 6.2.3.12 Affected: 6.2.3.13 Affected: 6.2.3.14 Affected: 6.2.3.15 Affected: 6.2.3.16 Affected: 6.2.3.17 Affected: 6.2.3.18 Affected: 6.6.0 Affected: 6.6.0.1 Affected: 6.6.1 Affected: 6.6.3 Affected: 6.6.4 Affected: 6.6.5 Affected: 6.6.5.1 Affected: 6.6.5.2 Affected: 6.6.7 Affected: 6.6.7.1 Affected: 6.4.0 Affected: 6.4.0.1 Affected: 6.4.0.3 Affected: 6.4.0.2 Affected: 6.4.0.4 Affected: 6.4.0.5 Affected: 6.4.0.6 Affected: 6.4.0.7 Affected: 6.4.0.8 Affected: 6.4.0.9 Affected: 6.4.0.10 Affected: 6.4.0.11 Affected: 6.4.0.12 Affected: 6.4.0.13 Affected: 6.4.0.14 Affected: 6.4.0.15 Affected: 6.4.0.16 Affected: 6.7.0 Affected: 6.7.0.1 Affected: 6.7.0.2 Affected: 6.7.0.3 Affected: 7.0.0 Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.0.4 Affected: 7.0.5 Affected: 7.1.0 Affected: 7.1.0.1 Affected: 7.1.0.2 Affected: 7.1.0.3 Affected: 7.2.0 Affected: 7.2.0.1 Affected: 7.2.1 Affected: 7.2.2 Affected: 7.2.3 Affected: 7.3.0 Affected: 7.3.1 Affected: 7.3.1.1 |
guessed | |
| Cisco | Cisco Umbrella Insights Virtual Appliance |
Affected:
N/A
|
guessed | |
| Cisco | Cisco Cyber Vision |
Affected:
3.0.4
Affected: 3.0.0 Affected: 3.0.1 Affected: 3.0.2 Affected: 3.0.3 Affected: 3.0.5 Affected: 3.0.6 Affected: 3.1.0 Affected: 3.1.2 Affected: 3.1.1 Affected: 3.2.3 Affected: 3.2.1 Affected: 3.2.4 Affected: 3.2.0 Affected: 3.2.2 Affected: 4.0.0 Affected: 4.0.1 Affected: 4.0.2 Affected: 4.0.3 Affected: 4.1.0 Affected: 4.1.1 Affected: 4.1.2 |
guessed | |
| Cisco | Cisco UTD SNORT IPS Engine Software |
Affected:
16.12.1a
Affected: 16.12.2 Affected: 16.12.3 Affected: 16.12.4 Affected: 16.12.5 Affected: 16.12.6 Affected: 16.12.7 Affected: 16.12.8 Affected: 16.6.1 Affected: 16.6.5 Affected: 16.6.6 Affected: 16.6.7a Affected: 16.6.9 Affected: 16.6.10 Affected: 17.1.1 Affected: 17.2.1r Affected: 17.3.1a Affected: 17.3.2 Affected: 17.3.3 Affected: 17.3.4a Affected: 17.3.6 Affected: 17.3.5 Affected: 17.3.7 Affected: 3.17.0S Affected: 3.17.1S Affected: 17.4.1a Affected: 17.4.2 Affected: 17.4.1b Affected: 17.5.1a Affected: 17.6.1a Affected: 17.6.2 Affected: 17.6.3a Affected: 17.6.4 Affected: 17.6.5 Affected: 17.7.1a Affected: 17.7.2 Affected: 17.10.1a Affected: 17.9.1a Affected: 17.9.2a Affected: 17.9.3a Affected: 17.8.1a Affected: Fuji-16.9.2 Affected: Fuji-16.9.4 Affected: Fuji-16.9.6 Affected: Fuji-16.9.3 Affected: Fuji-16.9.7 Affected: Fuji-16.9.8 Affected: Fuji-16.9.5 Affected: Denali-16.3.3 Affected: Denali-16.3.9 Affected: Denali-16.3.7 Affected: Denali-16.3.5 Affected: Denali-16.3.4 Affected: Everest-16.6.3 Affected: Everest-16.6.4 Affected: Everest-16.6.2 |
guessed |
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"versionStartIncluding": "17.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0DB2D2F1-FB90-485D-B6B4-B6E0A9351C95",
"versionEndExcluding": "17.11.1a",
"versionStartIncluding": "17.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:unified_threat_defense:*:*:*:*:*:*:*:*",
"matchCriteriaId": "FC04A2AB-CAAA-4723-90FD-C35CED76E029",
"versionEndExcluding": "17.12.1a",
"versionStartIncluding": "17.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:meraki_mx_security_appliance_firmware:-:*:*:*:*:*:*:*",
"matchCriteriaId": "4C60FD7B-F41F-4307-B3F4-905E7B7C17AF",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. This vulnerability is due to a flaw in the FTP module of the Snort detection engine. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and deliver a malicious payload."
},
{
"lang": "es",
"value": "Varios productos de Cisco se ven afectados por una vulnerabilidad en el motor de detecci\u00f3n Snort que podr\u00eda permitir que un atacante remoto no autenticado omitir las pol\u00edticas configuradas en un sistema afectado. Esta vulnerabilidad se debe a una falla en el m\u00f3dulo FTP del motor de detecci\u00f3n de Snort. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando tr\u00e1fico FTP manipulado a trav\u00e9s de un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante omitir la inspecci\u00f3n de FTP y entregar un payload maliciosa."
}
],
"id": "CVE-2023-20071",
"lastModified": "2026-08-11T19:37:30.880",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "psirt@cisco.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2023-11-01T18:15:09.090",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-ftd-zXYtnjOM"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-ftd-zXYtnjOM"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-1039"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2025-05-28T23:50:44+00:00",
"cve": "CVE-2023-20071",
"id": "CVE-2023-20071",
"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-2023-20071",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-20071.json",
"version": "3"
}
}
}
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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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