Vulnerability · NVD
CVE-2023-40547
HIGH 8.3
A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.
Attack vector : Adjacent network
No privileges required
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
4.89%
above median
percentile 91.3%
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Server 2022 (Server Core installation) Fixed in 10.0.20348.3453
- Windows Server 2022 Fixed in 10.0.25398.1551
- Windows Server 2019 Fixed in 10.0.17763.7136
- Windows Server 2016 Fixed in 10.0.14393.7969
- Windows 11 24H2 · 2024-H2 Fixed in 10.0.26100.3775
- Windows 11 23H2 · 2023-H2 Fixed in 10.0.22631.5189
- Windows 11 22H2 · 2022-H2 Fixed in 10.0.22621.5189
- Windows 11 21H2 · 2021-H2 Fixed in 10.0.22000.3147
- Windows 10 22H2 · 2022-H2 Fixed in 10.0.19045.5737
- Windows 10 21H2 · 2021-H2 Fixed in 10.0.19044.5737
- Windows 10 1809 · 2018-09 Fixed in 10.0.17763.7136
- Windows 10 1607 · 2016-07 Fixed in 10.0.14393.7969