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CVE-2023-40546

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Date: January 29, 2024

A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn't match the format string used by it, leading to a crash under certain circumstances.

Language: C

Severity Score

Related Resources (14)

https://access.redhat.com/errata/RHSA-2024:2086
https://access.redhat.com/errata/RHSA-2024:1835
https://github.com/rhboot/shim/commit/66e6579dbf921152f647a0c16da1d3b2f40861ca
https://access.redhat.com/errata/RHSA-2024:1834
https://access.redhat.com/errata/RHSA-2024:1903
https://access.redhat.com/errata/RHSA-2024:1902
https://access.redhat.com/errata/RHSA-2024:1959
https://bugzilla.redhat.com/show_bug.cgi?id=2241796
https://access.redhat.com/errata/RHSA-2024:1873
https://nvd.nist.gov/vuln/detail/CVE-2023-40546
https://access.redhat.com/errata/RHSA-2024:1883
https://access.redhat.com/security/cve/CVE-2023-40546
https://access.redhat.com/errata/RHSA-2024:1876
https://www.mend.io/vulnerability-database/CVE-2023-40546

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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