CVE-2023-32252

2023-07-2400:00:00

ubuntu.com

linux kernel

ksmbd

smb server

denial-of-service

smb2_logoff command

9 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.004 Low

EPSS

Percentile

73.4%

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_LOGOFF
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 kwnon as ZDI-23-700, ZDI-CAN-20590 needs ksmbd-tools installed to enable the service, which is not installed by default. same fix as CVE-2023-32257, CVE-2023-32250

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-94.104UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-32.32UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1053.58UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1011.11UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1003.3UNKNOWN
ubuntu24.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1053.58~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.2< 6.2.0-1011.11~22.04.1UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1056.64UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1011.11UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-94.104	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-32.32	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1053.58	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	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1053.58~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.2	< 6.2.0-1011.11~22.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1056.64	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1011.11	UNKNOWN