CVE-2023-40549

Shim: out-of-bounds read in verify_buffer_authenticode() malformed pe file

Description

An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.

Remediation

Workaround:

  • There's no available mitigation for this issue.

Category

6.2
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
Affected: Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:1834 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1835 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1873 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1876 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1883 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1902 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1903 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1959 vendor advisory
https://access.redhat.com/errata/RHSA-2024:2086 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-40549 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241797 vendor advisory issue tracking
https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html

Frequently Asked Questions

What is the severity of CVE-2023-40549?
CVE-2023-40549 has been scored as a medium severity vulnerability.
How to fix CVE-2023-40549?
As a workaround for remediating CVE-2023-40549: There's no available mitigation for this issue.
Is CVE-2023-40549 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-40549 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-40549?
CVE-2023-40549 affects Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support.
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