msrc_cve-2024-43639
Vulnerability from csaf_microsoft
Published
2024-11-12 08:00
Modified
2024-11-18 08:00
Summary
Windows KDC Proxy Remote Code Execution Vulnerability
Notes
Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action
Required. The vulnerability documented by this CVE requires customer action to resolve.
{
"document": {
"acknowledgments": [
{
"names": [
"Wei in Kunlun Lab with \u003ca href=\"https://www.cyberkl.com/\"\u003eCyber KunLun\u003c/a\u003e"
]
},
{
"names": [
"\u003ca href=\"https://twitter.com/keyz3r0\"\u003ek0shl\u003c/a\u003e with \u003ca href=\"https://www.cyberkl.com/\"\u003eKunlun Lab\u003c/a\u003e"
]
}
],
"aggregate_severity": {
"namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
"text": "Critical"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Public",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en-US",
"notes": [
{
"category": "general",
"text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
"title": "Disclaimer"
},
{
"category": "general",
"text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
"title": "Customer Action"
}
],
"publisher": {
"category": "vendor",
"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
"namespace": "https://msrc.microsoft.com"
},
"references": [
{
"category": "self",
"summary": "CVE-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43639"
},
{
"category": "self",
"summary": "CVE-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/2024/msrc_cve-2024-43639.json"
},
{
"category": "external",
"summary": "Microsoft Exploitability Index",
"url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
},
{
"category": "external",
"summary": "Microsoft Support Lifecycle",
"url": "https://support.microsoft.com/lifecycle"
},
{
"category": "external",
"summary": "Common Vulnerability Scoring System",
"url": "https://www.first.org/cvss"
}
],
"title": "Windows KDC Proxy Remote Code Execution Vulnerability",
"tracking": {
"current_release_date": "2024-11-18T08:00:00.000Z",
"generator": {
"date": "2025-01-01T00:14:13.483Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
}
},
"id": "msrc_CVE-2024-43639",
"initial_release_date": "2024-11-12T08:00:00.000Z",
"revision_history": [
{
"date": "2024-11-12T08:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2024-11-13T08:00:00.000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Updated the CVE title to better reflect the affected protocol and added an FAQ to explain that only Windows Servers that are configured with the [[MS-KKDCP]: Kerberos Key Distribution Center (KDC) Proxy Protocol](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-kkdcp/5bcebb8d-b747-4ee5-9453-428aec1c5c38) are affected."
},
{
"date": "2024-11-18T08:00:00.000Z",
"legacy_version": "1.2",
"number": "3",
"summary": "Added FAQs to explain the mitigating circumstances for this vulnerability. KPSSVC is an additional feature Microsoft has been providing since Windows Server 2012. If customers do not have it configured in their environment, then this vulnerability is not exploitable. This is an informational change only."
}
],
"status": "final",
"version": "3"
}
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"vulnerabilities": [
{
"cve": "CVE-2024-43639",
"cwe": {
"id": "CWE-197",
"name": "Numeric Truncation Error"
},
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "An unauthenticated attacker could use a specially crafted application to leverage a cryptographic protocol vulnerability in Windows Kerberos to perform remote code execution against the target.",
"title": "How could an attacker exploit this vulnerability?"
},
{
"category": "faq",
"text": "The vulnerability only exists on the KPSSVC server. We recommend that instances of KPSSVC server be patched immediately.\nYes.\nNo. You are only vulnerable if you are already using KPSSVC in your environment. KPSSVC is an additional feature Microsoft has been providing since Windows Server 2012. If you do not have it configured in your environment, then this vulnerability is not exploitable.",
"title": "Is KDC Proxy Server service (KPSSVC) a dependency of KKDCP?"
},
{
"category": "faq",
"text": "This vulnerability only affects Windows Servers that are configured as a [MS-KKDCP]: Kerberos Key Distribution Center (KDC) Proxy Protocol server. Domain controllers are not affected.",
"title": "Are all Windows Servers affected by this vulnerability?"
}
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},
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 8.5,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
"version": "3.1"
},
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"7",
"8",
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}
],
"threats": [
{
"category": "impact",
"details": "Remote Code Execution"
},
{
"category": "exploit_status",
"details": "Exploited:No;Latest Software Release:Exploitation Less Likely"
}
],
"title": "Windows KDC Proxy Remote Code Execution Vulnerability"
}
]
}
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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.
- 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.