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CVE-2023-40550

Shim: out-of-bound read in verify_buffer_sbat()

Published: Jan 29, 2024Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-125
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.4%
Top 69.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-125

Affected Products

shimredhat
On-prem
Operating Systems / linux-distro
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
enterprise linuxredhat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 7Red Hat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 8Red Hat
On-premOS
Operating Systems / linux-distro
redhatcommercialUSOperating Systemsaka red hat
fedoraprojectoss-projectUSOperating Systemsaka fedora project
red hatcommercialUSOperating Systemsaka red hat
and 17 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2024:1834
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1835
access.redhat.com
https://access.redhat.com/errata/RHSA-2024:1873
access.redhat.com
and 15 more references View all →

Timeline

Published
Jan 29, 2024
Last Updated
Nov 21, 2024

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