CVE-2023-44191

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An Allocation of Resources Without Limits or Throttling vulnerability in 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.

This issue affects:

Juniper Networks Junos OS on QFX5000 Series and EX4000 Series

* 21.1 versions prior to 21.1R3-S5; * 21.2 versions prior to 21.2R3-S5; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S4; * 22.1 versions prior to 22.1R3-S3; * 22.2 versions prior to 22.2R3-S1; * 22.3 versions prior to 22.3R2-S2, 22.3R3; * 22.4 versions prior to 22.4R2.

This issue does not affect Juniper Networks Junos OS versions prior to 21.1R1

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

VendorProductVersions
Juniper NetworksJunos OS>= 21.1, < 21.1R3-S5; >= 21.2, < 21.2R3-S5; >= 21.3, < 21.3R3-S5; >= 21.4, < 21.4R3-S4; >= 22.1, < 22.1R3-S3; >= 22.2, < 22.2R3-S1; >= 22.3, < 22.3R2-S2, 22.3R3; >= 22.4, < 22.4R2
juniper_networksjunos_os< 21.1r1; >= 21.1, < 21.1r3-s5; >= 21.2, < 21.2r3-s5; >= 21.3, < 21.3r3-s5; >= 21.4, < 21.4r3-s4; >= 22.1, < ss.1r3-s3; >= 22.2, < 22.2r3-s1; >= 22.3, < 22.3r2-s2; >= 22.4, < 22.4r2

References

Timeline

Published
Oct 13, 2023
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2023-44191: High severity, CVSS 7.5 | Vulnix