Show plain JSON{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2023-40548", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2023-08-15T20:04:15.615Z", "datePublished": "2024-01-29T14:53:44.319Z", "dateUpdated": "2025-05-29T15:09:22.534Z"}, "containers": {"cna": {"title": "Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-3.el7", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:7::client", "cpe:/o:redhat:enterprise_linux:7::server", "cpe:/o:redhat:enterprise_linux:7::workstation"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim-signed", "defaultStatus": "affected", "versions": [{"version": "0:15.8-1.el7", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:7::client", "cpe:/o:redhat:enterprise_linux:7::server", 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