CVE-2023-40548 (GCVE-0-2023-40548)
Vulnerability from cvelistv5 – Published: 2024-01-29 14:53 – Updated: 2025-11-20 19:53
VLAI
Title
Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems
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.
Severity
7.4 (High)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
11 references
| URL | Tags |
|---|---|
| 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
17 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 |
|
| 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 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:15.8-4.el8_9 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:8::baseos |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:15.8-4.el9_3 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:9::baseos |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
Date Public
2023-10-03 00:00
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\"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\": 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\"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\", 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\"2023-10-03T00:00:00.000Z\", \"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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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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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