CVE-2023-40551

2024-01-2917:15:08

Debian Security Bug Tracker

security-tracker.debian.org

mz binary format

shim

out-of-bounds read

sensitive data

system boot phase

unix

5.1 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.5%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Debian12allshim<= 15.7-1shim_15.7-1_all.deb
Debian11allshim<= 15.7-1~deb11u1shim_15.7-1~deb11u1_all.deb
Debian999allshim< 15.8-1shim_15.8-1_all.deb
Debian13allshim<= 15.7-1shim_15.7-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	shim	<= 15.7-1	shim_15.7-1_all.deb
Debian	11	all	shim	<= 15.7-1~deb11u1	shim_15.7-1~deb11u1_all.deb
Debian	999	all	shim	< 15.8-1	shim_15.8-1_all.deb
Debian	13	all	shim	<= 15.7-1	shim_15.7-1_all.deb