Main Vulnerability Database SB20231018143

SB20231018143 - Denial of service in Junos OS

Published: October 18, 2023

Security Bulletin ID SB20231018143

CSH Severity

Medium

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Remote access

Highest impact Denial of service

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Allocation of resources without limits or throttling (CVE-ID: CVE-2023-44191)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). On all Junos OS QFX5000 Series and EX4000 Series platforms, when a high number of VLANs are configured, a specific DHCP packet will cause PFE hogging which will lead to dropping of socket connections.

Remediation

Install update from vendor's website.

References

https://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-QFX5000-Series-and-EX4000-Series-Denial-of-Service-DoS-on-a-large-scale-VLAN-due-to-PFE-hogging-CVE-2023-44191