CVE-2023-40548: Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems
First published: Mon Oct 02 2023(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| <15.8 | ||
| =15.8-rc1 | ||
| =39 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2259921
- https://access.redhat.com/errata/RHSA-2024:1834
- https://access.redhat.com/errata/RHSA-2024:1835
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2234589#c17
- https://access.redhat.com/errata/RHSA-2024:1873
- https://access.redhat.com/errata/RHSA-2024:1876
- https://access.redhat.com/errata/RHSA-2024:1883
- https://access.redhat.com/errata/RHSA-2024:1903
- https://access.redhat.com/errata/RHSA-2024:1902
- https://access.redhat.com/errata/RHSA-2024:1959
- https://access.redhat.com/errata/RHSA-2024:2086
- https://bugzilla.redhat.com/show_bug.cgi?id=2241782
- https://access.redhat.com/security/cve/CVE-2023-40548
- https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html
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- canonical/redhat shim
- version/redhat shim/15.8-rc1
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/39