Remote code execution in Linux Kernel ksmbd

Published: 2023-09-06

Risk	High
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2023-32258
CWE-ID	CWE-362
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Linux kernel Operating systems & Components / Operating system
Vendor	Linux Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Race condition

EUVDB-ID: #VU80501

Risk: High

CVSSv3.1:

CVE-ID: CVE-2023-32258

CWE-ID:

Exploit availability:

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition when processing SMB2_LOGOFF and SMB2_CLOSE commands in ksmbd. A remote attacker can send specially crafted data to the server and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

Fixed software versions

CPE2.3

cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

http://bugzilla.redhat.com/show_bug.cgi?id=2219809
http://www.zerodayinitiative.com/advisories/ZDI-23-706/
http://github.com/torvalds/linux/commit/abcc506a9a71976a8b4c9bf3ee6efd13229c1e19

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?