QID 379359

Date Published: 2024-02-09

QID 379359: Shim package Multiple Vulnerabilities

Shim is an open-source projects and other third parties built a small application, that contains the vendor certificate and code that verifies and runs the bootloader (typically GRUB2).

Shilm is affected with multiple security vulnerabilities.
CVE-2023-40547 Remote code execution vulnerability was found in Shim CVE-2023-40546 Fixes a LogError() invocation (NULL pointer dereference)
CVE-2023-40548 Fixes an integer overflow on SBAT section size on 32-bit systems (heap overflow)
CVE-2023-40549 Fixes an out-of-bounds read when loading a PE binary
CVE-2023-40550 Fixes an out-of-bounds read when trying to validate the SBAT information
CVE-2023-40551 Fix bounds check for MZ binaries

Successful exploitation of this vulnerability could lead to a security breach or could lead to remote code execution, crash, denial of service and exposure of sensitive data

CVSS V3 rated as Critical - 8.3 severity.

CVSS V2 rated as High - 6.8 severity.

Solution

Refer to Red hat security advisory CVE-2023-40547 Debian security advisory CVE-2023-40547, Suse security advisory CVE-2023-40547 for updates.

Vendor References

CVE-2023-40547 - eclypsium.com/blog/the-real-shim-shady-how-cve-2023-40547-impacts-most-linux-systems/

CVEs related to QID 379359

CVE-2023-40547 | CVE-2023-40546 | CVE-2023-40548 | CVE-2023-40549 | CVE-2023-40550 | CVE-2023-40551 |

Software Advisories

Advisory ID	Software	Component	Link

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