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High MSRC-CVE-2023-21549 1 CVE

Windows SMB Witness Service Elevation of Privilege Vulnerability

Published Jan 10, 2023 · Updated Jan 23, 2023 · Revision 3

Vendor: Microsoft

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

How could an attacker exploit the vulnerability?
To exploit this vulnerability, an attacker could execute a specially crafted malicious script which executes an RPC call to an RPC host. This could result in elevation of privilege on the server.

What privileges could be gained by an attacker who successfully exploited the vulnerability?
An attacker who successfully exploited this vulnerability could execute RPC functions that are restricted to privileged accounts only.

Security updates
10.0.17763.3887 — https://support.microsoft.com/help/5022286
10.0.20348.1487 — https://support.microsoft.com/help/5022291
10.0.19042.2486 — https://support.microsoft.com/help/5022282
10.0.22000.1455 — https://support.microsoft.com/help/5022287
10.0.22621.1105 — https://support.microsoft.com/help/5022303
10.0.10240.19685 — https://support.microsoft.com/help/5022297
10.0.14393.5648 — https://support.microsoft.com/help/5022289
6.3.9600.20778 — https://support.microsoft.com/help/5022352
6.3.9600.20778 — https://support.microsoft.com/help/5022346
6.2.9200.24075 — https://support.microsoft.com/help/5022348
6.2.9200.24075 — https://support.microsoft.com/help/5022343

Vulnerabilities 1

Revision history

  1. #3

    Revised the Security Updates table to include Windows 8.1 for 32-bit systems because it is affected by CVE-2023-21524 and removed Windows 7 for 32-bit Systems Service Pack 1 as it is not affected. Microsoft recommends that customers running Windows 8.1 for 32-bit systems should install security update 5022338 to be protected from this vulnerability.

  2. #2

    Updated CVE Tag. This is an informational change only.

  3. #1

    Information published.

References