CVE-2023-38429

2023-07-1800:00:00

ubuntu.com

linux kernel

memory allocation

out-of-bounds access

ksmbd

service installation

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

43.3%

JSON

An issue was discovered in the Linux kernel before 6.3.4.
fs/ksmbd/connection.c in ksmbd has an off-by-one error in memory allocation
(because of ksmbd_smb2_check_message) that may lead to out-of-bounds
access.

Bugs

<https://bugzilla.suse.com/show_bug.cgi?id=1213424>

Notes

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

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-83.92UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-32.32UNKNOWN
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
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1044.49~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.2< 6.2.0-1011.11~22.04.1UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1046.53UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1011.11UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-83.92	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-32.32	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	20.04	noarch	linux-aws-5.15	< 5.15.0-1044.49~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.2	< 6.2.0-1011.11~22.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1046.53	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1011.11	UNKNOWN