CVE-2023-40548 (GCVE-0-2023-40548)

Vulnerability from cvelistv5 – Published: 2024-01-29 14:53 – Updated: 2025-11-20 19:53
VLAI?
Summary
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.
CWE
Assigner
References
https://access.redhat.com/errata/RHSA-2024:1834 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1835 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1873 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1876 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1883 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1902 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1903 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:1959 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:2086 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-40548 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2241782 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 7 Unaffected: 0:15.8-3.el7 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:7::server
    cpe:/o:redhat:enterprise_linux:7::workstation
    cpe:/o:redhat:enterprise_linux:7::client
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 7 Unaffected: 0:15.8-1.el7 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:7::server
    cpe:/o:redhat:enterprise_linux:7::workstation
    cpe:/o:redhat:enterprise_linux:7::client
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:15.8-4.el8_9 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 0:15.8-2.el8_2 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.2::baseos
    cpe:/o:redhat:rhel_aus:8.2::baseos
    cpe:/o:redhat:rhel_tus:8.2::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service Unaffected: 0:15.8-2.el8_2 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.2::baseos
    cpe:/o:redhat:rhel_aus:8.2::baseos
    cpe:/o:redhat:rhel_tus:8.2::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions Unaffected: 0:15.8-2.el8_2 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.2::baseos
    cpe:/o:redhat:rhel_aus:8.2::baseos
    cpe:/o:redhat:rhel_tus:8.2::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:15.8-2.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.4::baseos
    cpe:/o:redhat:rhel_tus:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service Unaffected: 0:15.8-2.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.4::baseos
    cpe:/o:redhat:rhel_tus:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Unaffected: 0:15.8-2.el8_4 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.4::baseos
    cpe:/o:redhat:rhel_tus:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Unaffected: 0:15.8-2.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_eus:8.6::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Unaffected: 0:15.8-2.el8 , < * (rpm)
    cpe:/a:redhat:rhel_eus:8.8::crb
    cpe:/o:redhat:rhel_eus:8.8::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support Unaffected: 0:15.8-2.el8 , < * (rpm)
    cpe:/a:redhat:rhel_eus:8.8::crb
    cpe:/o:redhat:rhel_eus:8.8::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:15.8-4.el9_3 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support Unaffected: 0:15.8-3.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.0::appstream
    cpe:/a:redhat:rhel_eus:9.0::crb
    cpe:/o:redhat:rhel_eus:9.0::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support Unaffected: 0:15.8-2.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.0::appstream
    cpe:/a:redhat:rhel_eus:9.0::crb
    cpe:/o:redhat:rhel_eus:9.0::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support Unaffected: 0:15.8-2.el9 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.0::appstream
    cpe:/a:redhat:rhel_eus:9.0::crb
    cpe:/o:redhat:rhel_eus:9.0::baseos
Create a notification for this product.
    Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support Unaffected: 0:15.8-3.el9_2 , < * (rpm)
    cpe:/o:redhat:rhel_eus:9.2::baseos
Create a notification for this product.
Show details on NVD website

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[\"cpe:/o:redhat:rhel_e4s:8.2::baseos\", \"cpe:/o:redhat:rhel_aus: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\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8_2\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_e4s:8.4::baseos\", \"cpe:/o:redhat:rhel_tus:8.4::baseos\", \"cpe:/o:redhat:rhel_aus:8.4::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8_4\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_e4s:8.4::baseos\", \"cpe:/o:redhat:rhel_tus:8.4::baseos\", \"cpe:/o:redhat:rhel_aus:8.4::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8.4 Telecommunications Update Service\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8_4\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_e4s:8.4::baseos\", \"cpe:/o:redhat:rhel_tus:8.4::baseos\", \"cpe:/o:redhat:rhel_aus:8.4::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8_4\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_eus:8.6::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8.6 Extended Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8_6\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"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\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"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\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el8\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim-unsigned-x64\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-4.el9_3\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"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\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-3.el9\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"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\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el9\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim-unsigned-aarch64\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"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\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-2.el9\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim-unsigned-x64\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:rhel_eus:9.2::baseos\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9.2 Extended Update Support\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"0:15.8-3.el9_2\", \"lessThan\": \"*\", \"versionType\": \"rpm\"}], \"packageName\": \"shim\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"affected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2023-10-02T00:00:00+00:00\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2023-10-03T00:00:00+00:00\", \"value\": \"Made public.\"}], \"datePublic\": \"2023-10-03T00:00:00.000Z\", \"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-2023-40548\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2241782\", \"name\": \"RHBZ#2241782\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"There\u0027s no available mitigation for this issue.\"}], \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2025-11-20T19:53:32.879Z\"}, \"x_redhatCweChain\": \"(CWE-190|CWE-787): Integer Overflow or Wraparound or Out-of-bounds Write\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-40548\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-20T19:53:32.879Z\", \"dateReserved\": \"2023-08-15T20:04:15.615Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2024-01-29T14:53:44.319Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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