CVE-2023-32248

2023-07-2400:00:00

ubuntu.com

cve-2023-32248

linux kernel

ksmbd

smb server

denial-of-service

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.003 Low

EPSS

Percentile

69.7%

JSON

A flaw was found in the Linux kernel’s ksmbd, a high-performance in-kernel
SMB server. The specific flaw exists within the handling of
SMB2_TREE_CONNECT and SMB2_QUERY_INFO commands. The issue results from the
lack of proper validation of a pointer prior to accessing it. An attacker
can leverage this vulnerability to create a denial-of-service condition on
the system.

Bugs

Notes

Author	Note
rodrigo-zaiden	also known as ZDI-23-696, ZDI-CAN-20479 needs ksmbd-tools installed to enable the service, which is not installed by default.

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-79.86UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-27.28UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1042.47UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1009.9UNKNOWN
ubuntu23.10noarchlinux-aws< anyUNKNOWN
ubuntu24.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1041.46~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1045.52UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1009.9UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-79.86	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-27.28	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1042.47	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1009.9	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< any	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1041.46~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1045.52	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1009.9	UNKNOWN