SB2023061901 - Remote code execution in Linux kernel ksmbd 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2023061901

SB2023061901 - Remote code execution in Linux kernel ksmbd

Published: June 19, 2023

Security Bulletin ID SB2023061901
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Race condition (CVE-ID: CVE-2023-32250)

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

The vulnerability exists due to a race condition within the fs/ksmbd/connection.c in ksmbd in Linux kernel when processing SMB2_SESSION_SETUP commands. A remote attacker can exploit the race by sending concurrent session setup and logoff request and execute arbitrary code on the system.


2) Race condition (CVE-ID: CVE-2023-32254)

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists due to a race condition within fs/ksmbd/mgmt/tree_connect.c in ksmbd in Linux kernel when processing SMB2_TREE_DISCONNECT commands. A remote attacker can trigger a use-after-free error using concurrent smb2 tree disconnect requests and execute arbitrary code on the system.


Remediation

Install update from vendor's website.

References