msrc_cve-2022-26809
Vulnerability from csaf_microsoft
Published
2022-04-12 08:00
Modified
2022-04-19 07:00
Summary
Remote Procedure Call Runtime 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.
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"vulnerabilities": [
{
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"notes": [
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"text": "Microsoft",
"title": "Assigning CNA"
},
{
"category": "faq",
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"title": "How could an attacker exploit this vulnerability?"
},
{
"category": "faq",
"text": "The researcher who submitted the vulnerability used SMB as the attack vector to trigger the exploit in the RPC service, so the mitigation was effective for the issue that was presented to us. Although blocking ports 139 and 445 [SMB] at the perimeter firewall is a recommended practice, it does not directly protect against all potential attack scenarios for this specific vulnerability. At this time we are not aware of any other specific attack vectors for this vulnerability, and continue to encourage users to:\nApply the April 2022 security updates to fully address this issue., Follow Microsoft guidelines to secure SMB traffic. See Secure SMB Traffic in Windows Server.\nThe known attack that was presented to Microsoft does not use TCP Port 135 to initiate an exploit but, as the vulnerability is in RPC, blocking TCP port 135 at the enterprise perimeter firewall is a recommended best practice that would reduce the likelihood of other potential attacks against this vulnerability.",
"title": "Why did Microsoft remove the Mitigation to \u201cBlock TCP port 445 at the enterprise perimeter firewall\u201d?"
}
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"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809"
},
{
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}
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{
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"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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"threats": [
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"details": "Remote Code Execution"
},
{
"category": "exploit_status",
"details": "Exploited:No;Latest Software Release:Exploitation More Likely;Older Software Release:Exploitation More Likely"
}
],
"title": "Remote Procedure Call Runtime 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.
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