FKIE_CVE-2023-6549
Vulnerability from fkie_nvd - Published: 2024-01-17 21:15 - Updated: 2026-06-17 06:50
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/
Summary
Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read
References
Impacted products
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "NetScaler ADC",
"vendor": "Cloud Software Group",
"versions": [
{
"lessThan": "12.35",
"status": "affected",
"version": "14.1",
"versionType": "patch"
},
{
"lessThan": "51.15",
"status": "affected",
"version": "13.1",
"versionType": "patch"
},
{
"lessThan": "92.21",
"status": "affected",
"version": "13.0",
"versionType": "patch"
},
{
"lessThan": "37.176",
"status": "affected",
"version": "13.1-FIPS",
"versionType": "patch"
},
{
"lessThan": "55.302",
"status": "affected",
"version": "12.1-FIPS",
"versionType": "patch"
},
{
"lessThan": "55.302",
"status": "affected",
"version": "12.1-NDcPP",
"versionType": "patch"
}
]
}
],
"source": "secure@citrix.com"
}
],
"cisaActionDue": "2024-02-07",
"cisaExploitAdd": "2024-01-17",
"cisaRequiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability",
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*",
"matchCriteriaId": "E5672003-8E6B-4316-B5C9-FE436080ADD1",
"versionEndExcluding": "12.1-55.302",
"versionStartIncluding": "12.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*",
"matchCriteriaId": "D1A11ABD-4F45-4BA9-B30B-F1D8A612CC15",
"versionEndExcluding": "12.1-55.302",
"versionStartIncluding": "12.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
"matchCriteriaId": "FC0A5AAC-62DD-416A-A801-A7A95D5EF73C",
"versionEndExcluding": "13.0-92.21",
"versionStartIncluding": "13.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*",
"matchCriteriaId": "8C8A6B95-8338-4EE7-A6EC-7D84AEDC4AF3",
"versionEndExcluding": "13.1-37.176",
"versionStartIncluding": "13.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
"matchCriteriaId": "3CF77D9D-FC89-493D-B97D-F9699D182F54",
"versionEndExcluding": "13.1-51.15",
"versionStartIncluding": "13.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*",
"matchCriteriaId": "62CD82CF-9013-4E54-B175-19B804A351AA",
"versionEndExcluding": "14.1-12.35",
"versionStartIncluding": "14.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
"matchCriteriaId": "68E1F810-ABCD-40A7-A8C1-4E8727799C7C",
"versionEndExcluding": "13.0-92.21",
"versionStartIncluding": "13.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E870C309-D5CD-4181-9DEB-4833DE2EAEB7",
"versionEndExcluding": "13.1-51.15",
"versionStartIncluding": "13.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*",
"matchCriteriaId": "2836707F-A36F-479E-BFDC-CF55AEFC37EE",
"versionEndExcluding": "14.1-12.35",
"versionStartIncluding": "14.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and\u00a0Out-Of-Bounds Memory Read"
},
{
"lang": "es",
"value": "La restricci\u00f3n inadecuada de las operaciones dentro de los l\u00edmites de un b\u00fafer de memoria en NetScaler ADC y NetScaler Gateway permite una denegaci\u00f3n de servicio no autenticada"
}
],
"id": "CVE-2023-6549",
"lastModified": "2026-06-17T06:50:58.160",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 4.2,
"source": "secure@citrix.com",
"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"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-6549",
"options": [
{
"exploitation": "active"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-01-31T05:00:20.477654Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-01-17T21:15:11.690",
"references": [
{
"source": "secure@citrix.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"US Government Resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6549"
}
],
"sourceIdentifier": "secure@citrix.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "secure@citrix.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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