ALSA-2024:1902

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ALSA-2024:1902

Summary: Important: shim security update

Details: 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.

References: https://access.redhat.com/errata/RHSA-2024:1902, https://access.redhat.com/security/cve/CVE-2023-40546, https://access.redhat.com/security/cve/CVE-2023-40547, https://access.redhat.com/security/cve/CVE-2023-40548, https://access.redhat.com/security/cve/CVE-2023-40549, https://access.redhat.com/security/cve/CVE-2023-40550, https://access.redhat.com/security/cve/CVE-2023-40551, https://bugzilla.redhat.com/2234589, https://bugzilla.redhat.com/2241782, https://bugzilla.redhat.com/2241796, https://bugzilla.redhat.com/2241797, https://bugzilla.redhat.com/2259915, https://bugzilla.redhat.com/2259918, https://errata.almalinux.org/8/ALSA-2024-1902.html