SB2023100547 - Multiple vulnerabilities in Linux kernel ksmbd

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Main Vulnerability Database SB2023100547

SB2023100547 - Multiple vulnerabilities in Linux kernel ksmbd

Published: October 5, 2023

Security Bulletin ID SB2023100547
Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2023-38431)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in fs/smb/server/connection.c within ksmbd. A remote attacker can send a specially crafted data to the system, trigger an out-of-bounds read error and read contents of memory or perform a denial of service (DoS) attack.


2) Integer overflow (CVE-ID: CVE-2023-38427)

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

The vulnerability exists due to integer overflow within the deassemble_neg_contexts() function in fs/smb/server/smb2pdu.c in ksmbd. A remote attacker can send specially crafted data to ksmbd, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References