SB2023083004 - Multiple vulnerabilities in Linux kernel netfilter

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Main Vulnerability Database SB2023083004

SB2023083004 - Multiple vulnerabilities in Linux kernel netfilter

Published: August 30, 2023 Updated: May 21, 2025

Security Bulletin ID SB2023083004
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2023-3995)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the netfilter subsystem in net/netfilter/nf_tables_api.c when handling rule additions to bound chains. A local user can trigger memory corruption and execute arbitrary code on the target system.



2) Buffer overflow (CVE-ID: CVE-2023-4015)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the netfilter subsystem in net/netfilter/nft_immediate.c when handling bound chain deactivation. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.



3) Resource management error (CVE-ID: CVE-2023-3777)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper handling of table rules flush in certain circumstances within the netfilter subsystem in net/netfilter/nf_tables_api.c. A local user can perform a denial of service (DoS) attack or execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References