SB2023102645 - Ubuntu update for linux 

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Main Vulnerability Database SB2023102645

SB2023102645 - Ubuntu update for linux

Published: October 26, 2023

Security Bulletin ID SB2023102645
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) Race condition (CVE-ID: CVE-2023-42756)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition in the Netfilter subsystem. A local user can exploit the race  between IPSET_CMD_ADD and IPSET_CMD_SWAP and gain crash the kernel.


2) Use-after-free (CVE-ID: CVE-2023-4921)

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

The vulnerability exists due to a use-after-free error in the qfq_dequeue() function within the the Linux kernel's net/sched: sch_qfq component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


3) Use-after-free (CVE-ID: CVE-2023-5197)

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

The vulnerability exists due to a use-after-free error within Linux kernel netfilter: nf_tables component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References