CVE-2023-40551: Shim: out of bounds read when parsing mz binaries
First published: Tue Jan 23 2024(Updated: )
A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/shim | <15.8 | 15.8 |
| Red Hat Shim | <15.8 | |
| Fedora | =39 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux | =9.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2259919
- https://access.redhat.com/errata/RHSA-2024:1834
- https://access.redhat.com/errata/RHSA-2024:1835
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2234589#c17
- https://access.redhat.com/errata/RHSA-2024:1873
- https://access.redhat.com/errata/RHSA-2024:1876
- https://access.redhat.com/errata/RHSA-2024:1883
- 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://access.redhat.com/errata/RHSA-2024:2086
- https://bugzilla.redhat.com/show_bug.cgi?id=2259918
- https://access.redhat.com/security/cve/CVE-2023-40551
- https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html
Frequently Asked Questions
What is the severity of CVE-2023-40551?
The severity of CVE-2023-40551 is classified as high due to the potential for crashes and sensitive data exposure.
How do I fix CVE-2023-40551?
To fix CVE-2023-40551, update the shim package to version 15.8 or later.
What software is affected by CVE-2023-40551?
CVE-2023-40551 affects shim versions below 15.8, Red Hat Enterprise Linux 8.0, 9.0, and Fedora 39.
What kind of vulnerability is CVE-2023-40551?
CVE-2023-40551 is an out-of-bounds read vulnerability that can lead to a crash or exposure of sensitive data.
What can be the consequences of CVE-2023-40551?
The consequences of CVE-2023-40551 may include system crashes and potential exposure of sensitive information during the boot process.
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