PT-2023-3669 · Linux+5 · Linux Kernel+5

Chih-Yen Chang · Published 2023-06-02 · Updated 2025-01-13 · CVE-2023-38430

Positive Technologies (AI Summary)

CVSS v2.0

9.4

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.3.9

Description An issue was discovered in the Linux kernel where ksmbd does not validate the SMB request protocol ID, leading to an out-of-bounds read. This could allow a remote attacker to access protected information or cause a denial of service. The vulnerability is related to the ksmbd verify smb message() function in the fs/smb/server/smb common.c file of the KSMBD file system.

Recommendations For Linux kernel versions prior to 6.3.9, update to version 6.3.9 or later to resolve the issue. As a temporary workaround, consider restricting access to the ksmbd module to minimize the risk of exploitation.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALT-PU-2023-4663

ALT-PU-2024-4263

ALT-PU-2024-4843

AZL-27534

BDU:2023-03953

CVE-2023-38430

OESA-2023-1492

OESA-2023-1493

OESA-2023-1496

USN-6285-1

USN-6464-1

USN-6466-1

USN-6520-1

USN-6725-1

USN-6725-2

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 147

• https://ubuntu.com/security/CVE-2023-31085 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-3863 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52449 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26591 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52463 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52457 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-32254 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-2898 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-3776 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6466-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-3390 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-40283 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52464 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-1194 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-23850 · Vendor Advisory