Shim: out of bounds read when parsing mz binaries
CVE-2023-40551

5.1MEDIUM

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-2023-40551?

An identified flaw in the MZ binary format used within Shim has the potential to enable an out-of-bounds read condition. This issue could result in system crashes or, more critically, the unintended exposure of sensitive data during the boot phase of the operating system. Proper mitigation strategies are essential to ensure the security and stability of affected systems.

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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:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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