cbcvebase.
CVE-2023-40547
published 2024-01-25

CVE-2023-40547: A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw…

PriorityP355high8.3CVSS 3.1
AVAACHPRNUINSCCHIHAH
EPSS
4.89%
91.1th percentile
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.

Affected

24 ranges
VendorProductVersion rangeFixed in
debianshim< shim 15.8-1~deb12u1 (bookworm)shim 15.8-1~deb12u1 (bookworm)
msrcwindows_10——
msrcwindows_10_version_1607——
msrcwindows_10_version_1809——
msrcwindows_10_version_21h2——
msrcwindows_10_version_22h2——
msrcwindows_11_version_21h2——
msrcwindows_11_version_22h2——
msrcwindows_11_version_23h2——
msrcwindows_11_version_24h2——
msrcwindows_server_2012——
msrcwindows_server_2012_r2——
msrcwindows_server_2016——
msrcwindows_server_2019——
msrcwindows_server_2022——
msrcwindows_server_2022_23h2_edition——
redhatenterprise_linux——
redhatenterprise_linux——
redhatenterprise_linux——
redhatshim< 15.815.8
redhatshim>= 0 < 15.8-1~deb11u115.8-1~deb11u1
redhatshim>= 0 < 15.8-1~deb12u115.8-1~deb12u1
redhatshim>= 0 < 15.8-115.8-1
redhatshim>= 0 < 15.8-115.8-1

CVSS provenance

nvdv3.18.3HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
osv8.3HIGH
vendor_debian8.3HIGH
vendor_msrc8.3HIGH
vendor_redhat8.3HIGH
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