CVE-2023-32254

2023-05-2300:00:00

ubuntu.com

linux kernel

ksmbd

smb server

smb2_tree_disconnect

code execution

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

0.002 Low

EPSS

Percentile

54.2%

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_TREE_DISCONNECT 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

<https://bugzilla.suse.com/show_bug.cgi?id=1211536>

Notes

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

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-102.112UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-27.28UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1057.63UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1009.9UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1057.63~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1060.69UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1009.9UNKNOWN
ubuntu20.04noarchlinux-azure-5.15< 5.15.0-1060.69~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure-fde< 5.15.0-1060.69.1UNKNOWN
ubuntu20.04noarchlinux-azure-fde-5.15< 5.15.0-1060.69~20.04.1.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-102.112	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-27.28	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1057.63	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1009.9	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1057.63~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1060.69	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1009.9	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.15	< 5.15.0-1060.69~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure-fde	< 5.15.0-1060.69.1	UNKNOWN
ubuntu	20.04	noarch	linux-azure-fde-5.15	< 5.15.0-1060.69~20.04.1.1	UNKNOWN