CVE-2023-40548

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Source
https://cve.org/CVERecord?id=CVE-2023-40548
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-40548.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-40548
Downstream
Related
Published
2024-01-29T14:53:44.319Z
Modified
2026-06-28T03:54:27.668168822Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems
Details

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.

Database specific 
{
    "cna_assigner": "redhat",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40548.json",
    "cwe_ids": [
        "CWE-190"
    ]
}
References

Affected packages

Git / github.com/rhboot/shim

Affected ranges

Type
GIT
Repo
https://github.com/rhboot/shim
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5914984a1ffeab841f482c791426d7ca9935a5e6
Database specific 
{
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "15.8"
        },
        {
            "last_affected": "15.8-rc1"
        }
    ],
    "cpe": [
        "cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:redhat:shim:15.8:rc1:*:*:*:*:*:*"
    ]
}

Affected versions

0.*
0.3
0.4
0.5
0.7
0.8
0.9
Other
11
12
13
14
15
15.*
15.2
15.3
15.4
15.5
15.5-rc2
15.6
15.6-rc2
15.7
shim-15.*
shim-15.3-rc1
shim-15.3-rc2
shim-15.3-rc3
shim-15.3-rc4

Database specific

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