CVE-2023-40548

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.

References

Affected packages

Git / github.com/rhboot/shim

Affected ranges

Type

GIT

Repo

https://github.com/rhboot/shim

Events

Introduced

Fixed

5914984a1ffeab841f482c791426d7ca9935a5e6

Introduced

Last affected

7e5c94dcf1693cec2a653a95e738333187170b33

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "15.8"
        },
        {
            "introduced": "0"
        },
        {
            "last_affected": "15.8-rc1"
        }
    ]
}

Database specific

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "39"
            }
        ]
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-40548.json"