CVE-2023-38428

2023-07-1800:00:00

ubuntu.com

linux kernel

ksmbd

out-of-bounds.

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

46.0%

JSON

An issue was discovered in the Linux kernel before 6.3.4.
fs/ksmbd/smb2pdu.c in ksmbd does not properly check the UserName value
because it does not consider the address of security buffer, leading to an
out-of-bounds read.

Bugs

<https://bugzilla.suse.com/show_bug.cgi?id=1213423>

Notes

Author	Note
rodrigo-zaiden	needs ksmbd-tools installed to enable the service, which is not installed by default.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux-hwe-5.15< 5.15.0-83.92~20.04.1UNKNOWN
ubuntu22.04noarchlinux-kvm< 5.15.0-1041.46UNKNOWN
ubuntu23.04noarchlinux-kvm< 6.2.0-1012.12UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1044.49~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1044.49UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1011.11UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1003.3UNKNOWN
ubuntu24.04noarchlinux-aws< 6.5.0-1003.3UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1011.11UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1046.53UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux-hwe-5.15	< 5.15.0-83.92~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-kvm	< 5.15.0-1041.46	UNKNOWN
ubuntu	23.04	noarch	linux-kvm	< 6.2.0-1012.12	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1044.49~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1044.49	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1011.11	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< 6.5.0-1003.3	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< 6.5.0-1003.3	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1011.11	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1046.53	UNKNOWN