MSRC_CVE-2021-36942
Vulnerability from csaf_microsoft - Published: 2021-08-10 07:00 - Updated: 2021-08-10 07:00Summary
Windows LSA Spoofing Vulnerability
Severity
Important
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.
Affected products
Fixed
16 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.21192
Windows Server 2008 for 32-bit Systems Service Pack 2
|
6.0.6003.21192 | ||
|
Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.21192
Windows Server 2008 for x64-based Systems Service Pack 2
|
6.0.6003.21192 | ||
|
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.21192
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
|
6.0.6003.21192 | ||
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.25685
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
|
6.1.7601.25685 | ||
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.25685
Windows Server 2008 R2 for x64-based Systems Service Pack 1
|
6.1.7601.25685 | ||
|
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.21192
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
|
6.0.6003.21192 | ||
|
Windows Server 2012 6.2.9200.23435
Windows Server 2012
|
6.2.9200.23435 | ||
|
Windows Server 2012 (Server Core installation) 6.2.9200.23435
Windows Server 2012 (Server Core installation)
|
6.2.9200.23435 | ||
|
Windows Server 2012 R2 6.3.9600.20094
Windows Server 2012 R2
|
6.3.9600.20094 | ||
|
Windows Server 2012 R2 (Server Core installation) 6.3.9600.20094
Windows Server 2012 R2 (Server Core installation)
|
6.3.9600.20094 | ||
|
Windows Server 2016 10.0.14393.4583
Windows Server 2016
|
10.0.14393.4583 | ||
|
Windows Server 2016 (Server Core installation) 10.0.14393.4583
Windows Server 2016 (Server Core installation)
|
10.0.14393.4583 | ||
|
Windows Server 2019 10.0.17763.2114
Windows Server 2019
|
10.0.17763.2114 | ||
|
Windows Server 2019 (Server Core installation) 10.0.17763.2114
Windows Server 2019 (Server Core installation)
|
10.0.17763.2114 | ||
|
Windows Server, version 2004 (Server Core installation) 10.0.19041.1165
Windows Server, version 2004 (Server Core installation)
|
10.0.19041.1165 | ||
|
Windows Server, version 20H2 (Server Core Installation) 10.0.19042.1165
Windows Server, version 20H2 (Server Core Installation)
|
10.0.19042.1165 |
Known affected
16 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
Windows Server, version 20H2 (Server Core Installation) <10.0.19042.1165
Windows Server, version 20H2 (Server Core Installation)
|
<10.0.19042.1165 |
Vendor Fix
fix
|
|
|
Windows Server, version 2004 (Server Core installation) <10.0.19041.1165
Windows Server, version 2004 (Server Core installation)
|
<10.0.19041.1165 |
Vendor Fix
fix
|
|
|
Windows Server 2019 (Server Core installation) <10.0.17763.2114
Windows Server 2019 (Server Core installation)
|
<10.0.17763.2114 |
Vendor Fix
fix
|
|
|
Windows Server 2019 <10.0.17763.2114
Windows Server 2019
|
<10.0.17763.2114 |
Vendor Fix
fix
|
|
|
Windows Server 2016 (Server Core installation) <10.0.14393.4583
Windows Server 2016 (Server Core installation)
|
<10.0.14393.4583 |
Vendor Fix
fix
|
|
|
Windows Server 2016 <10.0.14393.4583
Windows Server 2016
|
<10.0.14393.4583 |
Vendor Fix
fix
|
|
|
Windows Server 2012 R2 (Server Core installation) <6.3.9600.20094
Windows Server 2012 R2 (Server Core installation)
|
<6.3.9600.20094 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2012 R2 <6.3.9600.20094
Windows Server 2012 R2
|
<6.3.9600.20094 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2012 (Server Core installation) <6.2.9200.23435
Windows Server 2012 (Server Core installation)
|
<6.2.9200.23435 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2012 <6.2.9200.23435
Windows Server 2012
|
<6.2.9200.23435 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) <6.0.6003.21192
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
|
<6.0.6003.21192 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 <6.1.7601.25685
Windows Server 2008 R2 for x64-based Systems Service Pack 1
|
<6.1.7601.25685 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) <6.1.7601.25685
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
|
<6.1.7601.25685 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) <6.0.6003.21192
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
|
<6.0.6003.21192 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for x64-based Systems Service Pack 2 <6.0.6003.21192
Windows Server 2008 for x64-based Systems Service Pack 2
|
<6.0.6003.21192 |
Vendor Fix
fix
Vendor Fix
fix
|
|
|
Windows Server 2008 for 32-bit Systems Service Pack 2 <6.0.6003.21192
Windows Server 2008 for 32-bit Systems Service Pack 2
|
<6.0.6003.21192 |
Vendor Fix
fix
Vendor Fix
fix
|
Threats
Impact
Spoofing
Exploit Status
Publicly Disclosed:Yes;Exploited:No;Latest Software Release:Exploitation More Likely;Older Software Release:Exploitation More Likely
References
7 references
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"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.",
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},
{
"category": "self",
"summary": "CVE-2021-36942 Windows LSA Spoofing Vulnerability - CSAF",
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{
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"url": "https://www.first.org/cvss"
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"tracking": {
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"vulnerabilities": [
{
"cve": "CVE-2021-36942",
"notes": [
{
"category": "general",
"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
"text": "An unauthenticated attacker could call a method on the LSARPC interface and coerce the domain controller to authenticate against another server using NTLM. This security update blocks the affected API calls OpenEncryptedFileRawA and OpenEncryptedFileRawW through LSARPC interface.\nYes. Please see ADV210003 Mitigating NTLM Relay Attacks on Active Directory Certificate Services (AD CS).\nYes. Please see KB5005413 for more information on the steps that you need to take to protect your system. Please note that the combined CVSS score would be 9.8 when this vulnerability is chained with the noted NTLM Relay Attacks on Active Directory Certificate Services (AD CS).\nYes. This vulnerability affects all servers but domain controllers should be prioritized in terms of applying security updates.\nThe EFS API OpenEncryptedFileRaw(A/W), often used in backup software, continues to work in all versions of Windows (local and remote), except when backing up to or from a system running Windows Server 2008 SP2. OpenEncryptedFileRaw will no longer work on Windows Server 2008 SP2.",
"title": "How could an attacker exploit this vulnerability?"
}
],
"product_status": {
"fixed": [
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"9318",
"9344",
"10049",
"10051",
"10287",
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"10379",
"10483",
"10543",
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"11769",
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],
"known_affected": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
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},
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},
{
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"summary": "CVE-2021-36942 Windows LSA Spoofing Vulnerability - CSAF",
"url": "https://msrc.microsoft.com/csaf/advisories/2021/msrc_cve-2021-36942.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "10.0.17763.2114:Security Update:https://support.microsoft.com/help/5005030",
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},
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},
{
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"details": "10.0.19042.1165:Security Update:https://support.microsoft.com/help/5005033",
"product_ids": [
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],
"url": "https://support.microsoft.com/help/5005033"
},
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "10.0.14393.4583:Security Update:https://support.microsoft.com/help/5005043",
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"5"
],
"url": "https://support.microsoft.com/help/5005043"
},
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"details": "6.0.6003.21192:Monthly Rollup:https://support.microsoft.com/help/5005090",
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"16",
"11",
"15",
"14"
],
"url": "https://support.microsoft.com/help/5005090"
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{
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"details": "6.0.6003.21192:Security Only:https://support.microsoft.com/help/5005095",
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"15",
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"details": "6.1.7601.25685:Monthly Rollup:https://support.microsoft.com/help/5005088",
"product_ids": [
"12",
"13"
],
"url": "https://support.microsoft.com/help/5005088"
},
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "6.1.7601.25685:Security Only:https://support.microsoft.com/help/5005089",
"product_ids": [
"12",
"13"
],
"url": "https://support.microsoft.com/help/5005089"
},
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "6.2.9200.23435:Monthly Rollup:https://support.microsoft.com/help/5005099",
"product_ids": [
"10",
"9"
],
"url": "https://support.microsoft.com/help/5005099"
},
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "6.2.9200.23435:Security Only:https://support.microsoft.com/help/5005094",
"product_ids": [
"10",
"9"
],
"url": "https://support.microsoft.com/help/5005094"
},
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "6.3.9600.20094:Monthly Rollup:https://support.microsoft.com/help/5005076",
"product_ids": [
"8",
"7"
],
"url": "https://support.microsoft.com/help/5005076"
},
{
"category": "vendor_fix",
"date": "2021-08-10T07:00:00.000Z",
"details": "6.3.9600.20094:Security Only:https://support.microsoft.com/help/5005106",
"product_ids": [
"8",
"7"
],
"url": "https://support.microsoft.com/help/5005106"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalScore": 0.0,
"exploitCodeMaturity": "FUNCTIONAL",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 7.0,
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16"
]
}
],
"threats": [
{
"category": "impact",
"details": "Spoofing"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:Yes;Exploited:No;Latest Software Release:Exploitation More Likely;Older Software Release:Exploitation More Likely"
}
],
"title": "Windows LSA Spoofing Vulnerability"
}
]
}
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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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