Integer overflow in Shim - CVE-2023-40548
Published: February 7, 2024
Vulnerability identifier: #VU86237
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-40548
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Red Hat Bootloader Team
Affected software:
Shim
Shim
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow within the verify_sbat_section on 32-bits systems. A remote attacker can pass a specially crafted PE binary to the application, trigger an integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2023-40548
Install updates from vendor's website.