CVE-2023-40550

2024-01-2917:15:08

Debian Security Bug Tracker

security-tracker.debian.org

shim validation sbat unix boot phase data security

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

5.3 Medium

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

16.3%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Debian12allshim<= 15.7-1shim_15.7-1_all.deb
Debian11allshim<= 15.7-1~deb11u1shim_15.7-1~deb11u1_all.deb
Debian10allshim< 15.8-1~deb10u1shim_15.8-1~deb10u1_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	10	all	shim	< 15.8-1~deb10u1	shim_15.8-1~deb10u1_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