Vulnerability Details : CVE-2023-40550
An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.
Products affected by CVE-2023-40550
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-40550
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-40550
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.8
|
3.6
|
NIST | 2024-02-05 |
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.8
|
3.6
|
Red Hat, Inc. | 2024-01-29 |
CWE ids for CVE-2023-40550
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2023-40550
-
https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html
[SECURITY] [DLA 3813-1] shim security update
-
https://access.redhat.com/errata/RHSA-2024:1959
RHSA-2024:1959 - Security Advisory - Red Hat カスタマーポータル
-
https://access.redhat.com/security/cve/CVE-2023-40550
CVE-2023-40550- Red Hat Customer PortalVendor Advisory
-
https://access.redhat.com/errata/RHSA-2024:1883
RHSA-2024:1883 - Security Advisory - Red Hat Customer Portal
-
https://bugzilla.redhat.com/show_bug.cgi?id=2259915
2259915 – (CVE-2023-40550) CVE-2023-40550 shim: Out-of-bound read in verify_buffer_sbat()Issue Tracking;Vendor Advisory
-
https://access.redhat.com/errata/RHSA-2024:1873
RHSA-2024:1873 - Security Advisory - Red Hat カスタマーポータル
-
https://access.redhat.com/errata/RHSA-2024:1835
RHSA-2024:1835 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2024:1876
RHSA-2024:1876 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2024:1834
RHSA-2024:1834 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2024:1903
RHSA-2024:1903 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2024:2086
RHSA-2024:2086 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2024:1902
RHSA-2024:1902 - Security Advisory - Red Hat Customer Portal
Jump to