Red Hat: CVE-2023-40548: shim: Interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems (Multiple Advisories)
Description
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.
Solution(s)
- redhat-upgrade-mokutil
- redhat-upgrade-mokutil-debuginfo
- redhat-upgrade-shim-ia32
- redhat-upgrade-shim-unsigned-ia32
- redhat-upgrade-shim-unsigned-x64
- redhat-upgrade-shim-x64
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