Shim: out-of-bound read in verify_buffer_sbat()
CVE-2023-40550

5.5MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.2 Advanced Update Support
Red Hat Enterprise Linux 8.2 Telecommunications Update Service
Vendor
CVE Published:
29 January 2024

What is CVE-2023-40550?

An out-of-bounds read flaw has been identified within the Shim component, specifically during the validation of SBAT information. This vulnerability may allow for the unintentional exposure of sensitive data during the system’s boot phase. Organizations using Red Hat products with Shim should apply the latest security patches to mitigate the risks associated with this vulnerability, ensuring that their systems retain data integrity and security.

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Affected Version(s)

Red Hat Enterprise Linux 7 0:15.8-3.el7

Red Hat Enterprise Linux 7 0:15.8-1.el7

Red Hat Enterprise Linux 8 0:15.8-4.el8_9

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

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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