Vulnerability Details : CVE-2023-21674
Public exploit exists!
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Vulnerability category: Gain privilege
Products affected by CVE-2023-21674
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_11_21h2:-:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_11_21h2:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_11_22h2:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_11_22h2:-:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*
- cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:*
- cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_10_21h2:-:*:*:*:*:*:x86:*
- cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:x86:*
- cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:arm64:*
- cpe:2.3:o:microsoft:windows_10_22h2:-:*:*:*:*:*:x86:*
CVE-2023-21674 is in the CISA Known Exploited Vulnerabilities Catalog
CISA vulnerability name:
Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.
Notes:
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-21674; https://nvd.nist.gov/vuln/detail/CVE-2023-21674
Added on
2023-01-10
Action due date
2023-01-31
Exploit prediction scoring system (EPSS) score for CVE-2023-21674
0.21%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-21674
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
8.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
2.0
|
6.0
|
Microsoft Corporation |
CWE ids for CVE-2023-21674
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: secure@microsoft.com (Secondary)
References for CVE-2023-21674
-
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21674
CVE-2023-21674 - Security Update Guide - Microsoft - Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
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