Bug 2241782 (CVE-2023-40548)
Summary: | CVE-2023-40548 shim: Interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems | ||
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Product: | [Other] Security Response | Reporter: | Marco Benatto <mbenatto> |
Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
Status: | CLOSED ERRATA | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | mlewando, security-response-team |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | shim 15.8 | Doc Type: | If docs needed, set a value |
Doc Text: |
A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2024-04-18 07:24:40 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 2259921 | ||
Bug Blocks: | 2234588 |
Description
Marco Benatto
2023-10-02 16:49:18 UTC
Created shim tracking bugs for this issue: Affects: fedora-all [bug 2259921] shim 15.8-1.el7 passed sanity testing: signatures on efi binaries are correct, booting VM, netboot / httpboot over ipv4 and ipv6 all pass Important update information: The new shim revokes ALL PREVIOUS VERSIONS of GRUB2. Therefore GRUB2 MUST be updated to the latest version: grub2-2.02-0.87.el7_9.14 (RHSA-2024:128440-02) BEFORE OR SIMULTANEOUSLY with this shim in order for Secure Boot to continue to work. Failure to update GRUB2 will result in an UNBOOTABLE system. This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Advanced Update Support Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Red Hat Enterprise Linux 8.2 Telecommunications Update Service Via RHSA-2024:1834 https://access.redhat.com/errata/RHSA-2024:1834 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Extended Update Support Via RHSA-2024:1835 https://access.redhat.com/errata/RHSA-2024:1835 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat Enterprise Linux 8.4 Telecommunications Update Service Via RHSA-2024:1873 https://access.redhat.com/errata/RHSA-2024:1873 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2024:1876 https://access.redhat.com/errata/RHSA-2024:1876 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Extended Update Support Via RHSA-2024:1883 https://access.redhat.com/errata/RHSA-2024:1883 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2024:1903 https://access.redhat.com/errata/RHSA-2024:1903 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2024:1902 https://access.redhat.com/errata/RHSA-2024:1902 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2024:1959 https://access.redhat.com/errata/RHSA-2024:1959 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2024:2086 https://access.redhat.com/errata/RHSA-2024:2086 |