msrc_cve-2022-37966
Vulnerability from csaf_microsoft
Published
2022-11-08 08:00
Modified
2022-11-17 08:00
Summary
Windows Kerberos RC4-HMAC Elevation of Privilege 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": {
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"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"
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"contact_details": "secure@microsoft.com",
"name": "Microsoft Security Response Center",
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{
"category": "self",
"summary": "CVE-2022-37966 Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability - HTML",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37966"
},
{
"category": "self",
"summary": "CVE-2022-37966 Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/2022/msrc_cve-2022-37966.json"
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{
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"summary": "Common Vulnerability Scoring System",
"url": "https://www.first.org/cvss"
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"title": "Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability",
"tracking": {
"current_release_date": "2022-11-17T08:00:00.000Z",
"generator": {
"date": "2025-01-02T21:31:19.560Z",
"engine": {
"name": "MSRC Generator",
"version": "1.0"
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},
"id": "msrc_CVE-2022-37966",
"initial_release_date": "2022-11-08T08:00:00.000Z",
"revision_history": [
{
"date": "2022-11-08T08:00:00.000Z",
"legacy_version": "1",
"number": "1",
"summary": "Information published."
},
{
"date": "2022-11-17T08:00:00.000Z",
"legacy_version": "2",
"number": "2",
"summary": "To address a known issue where Kerberos authentication might fail for user, computer, service, and GMSA accounts when serviced by Windows domain controllers that have installed Windows security updates released on November 8, 2022, Microsoft is announcing the availability of out-of-band Windows updates available on the [Microsoft Update Catalog](https://www.catalog.update.microsoft.com/Home.aspx). For more information see the FAQs section of this CVE and the Known Issues section of [How to manage the Kerberos Protocol changes related to CVE-2022-37966](https://support.microsoft.com/help/5021131)."
}
],
"status": "final",
"version": "2"
}
},
"vulnerabilities": [
{
"cve": "CVE-2022-37966",
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "An unauthenticated attacker could conduct an attack that could leverage cryptographic protocol vulnerabilities in RFC 4757 (Kerberos encryption type RC4-HMAC-MD5) and MS-PAC (Privilege Attribute Certificate Data Structure specification) to bypass security features in a Windows AD environment.",
"title": "How could an attacker exploit this vulnerability?"
},
{
"category": "faq",
"text": "For more information please see How to manage the Kerberos Protocol changes related to CVE-2022-37966.",
"title": "Where can I find more information about these changes?"
},
{
"category": "faq",
"text": "The update to address this vulnerability for Windows Server 2022 Datacenter: Azure Edition (Server Core) is not hotpatchable and is therefore not included in the November Hotpatch KB (5019080). Customers running Windows Server 2022 Datacenter: Azure Edition (Server Core) as a domain controller should install the update for Windows Server 2022 (5019081). This update will require a computer restart.",
"title": "I am running Windows Server 2022 Datacenter: Azure Edition (Server Core) but the hotpatch (Windows Server 2022 Datacenter: Azure Edition (Hotpatch)) for it is not listed in the Security Updates table. Is there an update that I can apply for this edition of Windows Server 2022?"
},
{
"category": "faq",
"text": "An attacker who successfully exploited this vulnerability could gain administrator privileges.",
"title": "What privileges could be gained by an attacker who successfully exploited the vulnerability?"
},
{
"category": "faq",
"text": "Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment of the targeted component.",
"title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?"
},
{
"category": "faq",
"text": "Yes. The issue is addressed by out-of-band updates released to Microsoft Update Catalog on and after November 17, 2022. Customers who have not already installed the security updates released on November 8, 2022 should install the out-of-band updates instead. Customers who have already installed the November 8, 2022 Windows security updates and who are experiencing issues should install the out-of-band updates.\nFor more information about these updates please see the OS version specific info on Windows release health at the following links:\nhttps://learn.microsoft.com/en/windows/release-health/status-windows-11-22h2#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-11-21h2#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-server-2022#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-10-22h2#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-10-21h2#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-10-21h1#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-10-20h2#2953msgdesc, https://learn.microsoft.com/en/windows/release-health/status-windows-10-1809-and-windows-server-2019#2953msgdesc\nFor more information please see the Known Issues section of How to manage the Kerberos Protocol changes related to CVE-2022-37966.",
"title": "There is a known issue documented in the security updates that address this vulnerability, where Kerberos authentication might fail for user, computer, service, and GMSA accounts when serviced by Windows domain controllers that have installed Windows security updates released on November 8, 2022. Has an update been released that addresses this known issue?"
}
],
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"10483",
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"10816",
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"references": [
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{
"category": "self",
"summary": "CVE-2022-37966 Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-37966"
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 7.1,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/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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"threats": [
{
"category": "impact",
"details": "Elevation of Privilege"
},
{
"category": "exploit_status",
"details": "Exploited:No;Latest Software Release:Exploitation More Likely"
}
],
"title": "Windows Kerberos RC4-HMAC Elevation of Privilege 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.
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