CVE-2023-32257

2023-07-2400:00:00

ubuntu.com

linux kernel

ksmbd

smb server

code execution

vulnerability

smb2 commands

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 processing of
SMB2_SESSION_SETUP and SMB2_LOGOFF commands. The issue results from the
lack of proper locking when performing operations on an object. An attacker
can leverage this vulnerability to execute code in the context of the
kernel.

Bugs

Notes

Author	Note
rodrigo-zaiden	also kwnon as ZDI-23-705, ZDI-CAN-20596 needs ksmbd-tools installed to enable the service, which is not installed by default. same fix as CVE-2023-32252, 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
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
ubuntu20.04noarchlinux-azure-5.15< 5.15.0-1056.64~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure-fde< 5.15.0-1056.64.1UNKNOWN

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	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
ubuntu	20.04	noarch	linux-azure-5.15	< 5.15.0-1056.64~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure-fde	< 5.15.0-1056.64.1	UNKNOWN