CVE-2023-6549 (GCVE-0-2023-6549)
Vulnerability from cvelistv5
Published
2024-01-17 20:15
Modified
2025-10-21 23:05
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
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
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cloud Software Group | NetScaler ADC |
Version: 14.1 Version: 13.1 Version: 13.0 Version: 13.1-FIPS Version: 12.1-FIPS Version: 12.1-NDcPP |
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog
Date added: 2024-01-17
Due date: 2024-02-07
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Used in ransomware: Unknown
Notes: https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549; https://nvd.nist.gov/vuln/detail/CVE-2023-6549
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T08:35:13.934Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-6549",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-01-31T05:00:20.477654Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2024-01-17",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6549"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-10-21T23:05:27.936Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6549"
}
],
"timeline": [
{
"lang": "en",
"time": "2024-01-17T00:00:00.000Z",
"value": "CVE-2023-6549 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"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"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cb\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eImproper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and\u0026nbsp;\u003c/span\u003e\u003c/b\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\u003cb\u003eOut-Of-Bounds Memory Read\u003c/b\u003e\u003c/span\u003e\u003c/span\u003e\u003cbr\u003e"
}
],
"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"
}
],
"metrics": [
{
"cvssV3_1": {
"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"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-05-10T17:29:28.138Z",
"orgId": "e437aed5-38e0-4fa3-a98b-cb73e7acaec6",
"shortName": "Citrix"
},
"references": [
{
"url": "https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "e437aed5-38e0-4fa3-a98b-cb73e7acaec6",
"assignerShortName": "Citrix",
"cveId": "CVE-2023-6549",
"datePublished": "2024-01-17T20:15:53.345Z",
"dateReserved": "2023-12-06T11:01:58.256Z",
"dateUpdated": "2025-10-21T23:05:27.936Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"cisa_known_exploited": {
"cveID": "CVE-2023-6549",
"cwes": "[\"CWE-119\"]",
"dateAdded": "2024-01-17",
"dueDate": "2024-02-07",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549; https://nvd.nist.gov/vuln/detail/CVE-2023-6549",
"product": "NetScaler ADC and NetScaler Gateway",
"requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for a denial-of-service when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.",
"vendorProject": "Citrix",
"vulnerabilityName": "Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…