{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2023-40547", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2023-08-15T20:04:15.615Z", "datePublished": "2024-01-25T15:54:23.102Z", "dateUpdated": "2026-06-26T09:43:31.882Z"}, "containers": {"cna": {"title": "Shim: rce in http boot support may lead to secure boot bypass", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully."}], "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", "cpe:/o:redhat:enterprise_linux:7::workstation"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-4.el8_9", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:8::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_2", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_aus:8.2::baseos", "cpe:/o:redhat:rhel_e4s:8.2::baseos", "cpe:/o:redhat:rhel_tus:8.2::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_2", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_aus:8.2::baseos", "cpe:/o:redhat:rhel_e4s:8.2::baseos", "cpe:/o:redhat:rhel_tus:8.2::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_2", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_aus:8.2::baseos", "cpe:/o:redhat:rhel_e4s:8.2::baseos", "cpe:/o:redhat:rhel_tus:8.2::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_4", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_aus:8.4::baseos", "cpe:/o:redhat:rhel_e4s:8.4::baseos", "cpe:/o:redhat:rhel_tus:8.4::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_4", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_aus:8.4::baseos", "cpe:/o:redhat:rhel_e4s:8.4::baseos", "cpe:/o:redhat:rhel_tus:8.4::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_4", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_aus:8.4::baseos", "cpe:/o:redhat:rhel_e4s:8.4::baseos", "cpe:/o:redhat:rhel_tus:8.4::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.6 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8_6", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_eus:8.6::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:8.8::crb", "cpe:/o:redhat:rhel_eus:8.8::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8.8 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim-unsigned-x64", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el8", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:8.8::crb", "cpe:/o:redhat:rhel_eus:8.8::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-4.el9_3", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:9::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.0 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-3.el9", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:9.0::appstream", "cpe:/a:redhat:rhel_eus:9.0::crb", "cpe:/o:redhat:rhel_eus:9.0::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.0 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim-unsigned-aarch64", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el9", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:9.0::appstream", "cpe:/a:redhat:rhel_eus:9.0::crb", "cpe:/o:redhat:rhel_eus:9.0::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.0 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim-unsigned-x64", "defaultStatus": "affected", "versions": [{"version": "0:15.8-2.el9", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:9.0::appstream", "cpe:/a:redhat:rhel_eus:9.0::crb", "cpe:/o:redhat:rhel_eus:9.0::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.2 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "shim", "defaultStatus": "affected", "versions": [{"version": "0:15.8-3.el9_2", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:rhel_eus:9.2::baseos"]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2024:1834", "name": "RHSA-2024:1834", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1835", "name": "RHSA-2024:1835", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1873", "name": "RHSA-2024:1873", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1876", "name": "RHSA-2024:1876", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1883", "name": "RHSA-2024:1883", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1902", "name": "RHSA-2024:1902", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1903", "name": "RHSA-2024:1903", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1959", "name": "RHSA-2024:1959", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:2086", "name": "RHSA-2024:2086", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2023-40547", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2234589", "name": "RHBZ#2234589", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2024-01-23T00:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "description": "Out-of-bounds Write", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-787: Out-of-bounds Write", "workarounds": [{"lang": "en", "value": "If a system isn\u2019t required to boot from the network, configure the server\u2019s boot order to disable entirely or skip the network boot."}], "timeline": [{"lang": "en", "time": "2023-05-05T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2024-01-23T00:00:00.000Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Bill Demirkapi (Microsoft Security Response Center) for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-06-26T09:43:31.882Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T18:38:50.942Z"}, "title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2024/01/26/1", "tags": ["x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1834", "name": "RHSA-2024:1834", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1835", "name": "RHSA-2024:1835", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1873", "name": "RHSA-2024:1873", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1876", "name": "RHSA-2024:1876", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1883", "name": "RHSA-2024:1883", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1902", "name": "RHSA-2024:1902", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1903", "name": "RHSA-2024:1903", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:1959", "name": "RHSA-2024:1959", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/errata/RHSA-2024:2086", "name": "RHSA-2024:2086", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://access.redhat.com/security/cve/CVE-2023-40547", "tags": ["vdb-entry", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2234589", "name": "RHBZ#2234589", "tags": ["issue-tracking", "x_refsource_REDHAT", "x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-40547", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-02-13T05:00:44.907619Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-06-17T21:19:29.168Z"}}]}, "dataVersion": "5.2"}
CVE record
NVD configurations
Red Hat packages
OpenCVE enrichment
No data
Debian DLA
EUVD