CVE-2023-32247

2023-07-2400:00:00

ubuntu.com

linux

ksmbd

dos

smb

resource consumption

vulnerability

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

0.004 Low

EPSS

Percentile

74.5%

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_SESSION_SETUP commands. The issue results from the lack of control of
resource consumption. 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-23-695, ZDI-CAN-20478 needs ksmbd-tools installed to enable the service, which is not installed by default.

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-101.111UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-32.32UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1056.61UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1011.11UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1056.61~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.2< 6.2.0-1011.11~22.04.1UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1059.67UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1011.11UNKNOWN
ubuntu20.04noarchlinux-azure-5.15< 5.15.0-1059.67~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure-fde< 5.15.0-1059.67.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-101.111	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-32.32	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1056.61	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1011.11	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1056.61~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.2	< 6.2.0-1011.11~22.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1059.67	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1011.11	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.15	< 5.15.0-1059.67~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure-fde	< 5.15.0-1059.67.1	UNKNOWN