Red Hat 製品エラータ RHSA-2024:1902 - Security Advisory
発行日:
2024-04-18
更新日:
2024-04-18

RHSA-2024:1902 - Security Advisory

概要

Important: shim security update

タイプ/重大度

Security Advisory: Important

Red Hat Insights パッチ分析

このアドバイザリーの影響を受けるシステムを特定し、修正します。

影響を受けるシステムの表示

トピック

An update for shim is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

説明

The shim package contains a first-stage UEFI boot loader that handles chaining
to a trusted full boot loader under secure boot environments.

Security Fix(es):

  • shim: RCE in http boot support may lead to Secure Boot bypass (CVE-2023-40547)
  • shim: Interger overflow leads to heap buffer overflow in verify_sbat_section

on 32-bits systems (CVE-2023-40548)

  • shim: Out-of-bounds read printing error messages (CVE-2023-40546)
  • shim: Out-of-bounds read in verify_buffer_authenticode() malformed PE file

(CVE-2023-40549)

  • shim: Out-of-bound read in verify_buffer_sbat() (CVE-2023-40550)
  • shim: out of bounds read when parsing MZ binaries (CVE-2023-40551)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

解決策

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

影響を受ける製品

  • Red Hat Enterprise Linux for x86_64 8 x86_64
  • Red Hat Enterprise Linux for ARM 64 8 aarch64

修正

  • BZ - 2234589 - CVE-2023-40547 shim: RCE in http boot support may lead to Secure Boot bypass
  • BZ - 2241782 - CVE-2023-40548 shim: Interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems
  • BZ - 2241796 - CVE-2023-40546 shim: Out-of-bounds read printing error messages
  • BZ - 2241797 - CVE-2023-40549 shim: Out-of-bounds read in verify_buffer_authenticode() malformed PE file
  • BZ - 2259915 - CVE-2023-40550 shim: Out-of-bound read in verify_buffer_sbat()
  • BZ - 2259918 - CVE-2023-40551 shim: out of bounds read when parsing MZ binaries

Red Hat Enterprise Linux for x86_64 8

SRPM
shim-15.8-4.el8_9.src.rpm SHA-256: e9c38735d1d60307eff79022044b778f5965cfc7ded5ca6f23f79210fa971e89
x86_64
shim-ia32-15.8-4.el8_9.x86_64.rpm SHA-256: 82e900462f2c3ba550fb2261849b2328686b981244813c97dd68d36f9ddf858e
shim-x64-15.8-4.el8_9.x86_64.rpm SHA-256: d0b677831e9d6897c25e6322908d73f9b1043d88e8773ff3facf89e85771f000

Red Hat Enterprise Linux for ARM 64 8

SRPM
shim-15.8-4.el8_9.src.rpm SHA-256: e9c38735d1d60307eff79022044b778f5965cfc7ded5ca6f23f79210fa971e89
aarch64
shim-aa64-15.8-4.el8_9.aarch64.rpm SHA-256: 455afe58a185c181066cee426c0257c1e2e2230d1745285eb952b3817cab8891

Red Hat のセキュリティーに関する連絡先は secalert@redhat.com です。 連絡先の詳細は https://access.redhat.com/security/team/contact/ をご覧ください。