PT-2026-56924 · Juniper Networks · Junos+1

Publicado

2026-07-09

·

Atualizado

2026-07-09

·

CVE-2026-21901

CVSS v3.1

4.4

Média

VetorAV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
A NULL Pointer Dereference vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker setting or deactivating a specific SSH configuration parameter to create a Denial of Service (DoS).
A local high-privileged user configuring or deactivating a specific 'system services ssh' configuration parameter can exploit a null pointer dereference in one of the functions used by SSH. The function attempts to dereference a null pointer when accessing certain configuration data, resulting in an mgd process crash and restart. Continued execution of these configuration commands will create a sustained Denial of Service (DoS) condition.
This issue affects: Junos OS:
  • from 22.3 before 22.3R3-S5;
  • from 22.4 before 22.4R3-S10;
  • from 23.2 before 23.2R2-S7;
  • from 23.4 before 23.4R2-S8.
This issue does not affect Junos OS before 22.3R1.
Junos OS Evolved:
  • from 22.3R1-EVO before 23.2R2-S7-EVO;
  • from 23.4 before 23.4R2-S8-EVO.
This issue does not affect Junos OS Evolved before 22.3R1-EVO.

Correção

NULL Pointer Dereference

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Enumeração de Fraquezas

CWE-476

Identificadores relacionados

CVE-2026-21901

Produtos afetados

Junos
Junos Evolved