CVE-2026-21901— Juniper Networks Junos OS 异常处理不当漏洞
影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Juniper Networks | Junos OS | 22.3< 22.3R3-S5 | affected |
22.4< 22.4R3-S10 | affected | ||
23.2< 23.2R2-S7 | affected | ||
23.4< 23.4R2-S8 | affected | ||
< 22.3R1 | unaffected | ||
| Juniper Networks | Junos OS Evolved | 23.2< 23.2R2-S7-EVO | affected |
23.4< 23.4R2-S8-EVO | affected | ||
< 22.3R1-EVO | unaffected |
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一、 漏洞 CVE-2026-21901 基础信息
漏洞信息
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Vulnerability Title
Junos OS and Junos OS Evolved: Configuration of a specific SSH option results in mgd crash
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
来源: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 异常处理不当漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Juniper Networks Junos OS是美国Juniper Networks公司的一款专为路由器、交换机和防火墙等物理及虚拟设备打造的网络操作系统。 Juniper Networks Junos OS存在异常处理不当漏洞，该漏洞源于管理守护进程(mgd)中空指针取消引用，可能导致本地高权限攻击者配置或停用特定'system services ssh'配置参数时触发mgd进程崩溃和重启，造成拒绝服务。以下版本受到影响：Junos OS 22.3R3-S5之前版本、22.4R3-S10之前版本、2
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Juniper Networks | Junos OS | 22.3 ~ 22.3R3-S5 | - | |
| Juniper Networks | Junos OS Evolved | 23.2 ~ 23.2R2-S7-EVO | - |
二、漏洞 CVE-2026-21901 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-21901 厂商安全公告 (2)
同批安全公告 · Juniper Networks · 2026-07-09 · 共 22 条
| CVE-2026-57026 | 7.5 HIGH | Juniper Networks Junos OS 输入验证错误漏洞 |
| CVE-2026-57023 | 7.5 HIGH | Juniper Networks Junos OS 输入验证错误漏洞 |
| CVE-2026-57028 | 7.3 HIGH | Juniper Networks Junos OS Evolved 授权问题漏洞 |
| CVE-2026-57032 | 6.5 MEDIUM | Juniper Networks Junos OS 输入验证错误漏洞 |
| CVE-2026-33800 | 6.5 MEDIUM | Juniper Networks Junos OS 输入验证错误漏洞 |
| CVE-2026-33801 | 6.5 MEDIUM | Juniper Networks Junos OS 异常处理不当漏洞 |
| CVE-2026-33803 | 6.5 MEDIUM | Juniper Networks Junos OS Evolved 授权问题漏洞 |
| CVE-2026-57019 | 6.5 MEDIUM | Juniper Networks Junos OS 输入验证错误漏洞 |
| CVE-2026-57020 | 6.5 MEDIUM | Juniper Networks Junos OS 异常处理不当漏洞 |
| CVE-2026-57027 | 6.5 MEDIUM | Juniper Networks Junos OS 资源管理错误漏洞 |
| CVE-2026-57022 | 5.9 MEDIUM | Juniper Networks Junos OS 异常处理不当漏洞 |
| CVE-2026-57030 | 5.9 MEDIUM | Juniper Networks Junos OS 竞争条件问题漏洞 |
| CVE-2026-33794 | 5.9 MEDIUM | Juniper Networks Junos OS Evolved 异常处理不当漏洞 |
| CVE-2026-57054 | 5.8 MEDIUM | Juniper Networks Junos OS 输入验证错误漏洞 |
| CVE-2026-57025 | 5.5 MEDIUM | Juniper Networks Junos OS 缓冲区错误漏洞 |
| CVE-2026-33802 | 5.5 MEDIUM | Juniper Networks Junos OS 授权问题漏洞 |
| CVE-2026-57024 | 5.3 MEDIUM | Juniper Networks Junos OS 处理逻辑错误漏洞 |
| CVE-2026-57021 | 5.3 MEDIUM | Juniper Networks Junos OS 缓冲区错误漏洞 |
| CVE-2026-57029 | 5.3 MEDIUM | Juniper Networks Junos OS Evolved 竞争条件问题漏洞 |
| CVE-2026-57031 | 4.7 MEDIUM | Juniper Networks Junos OS 异常处理不当漏洞 |
显示前 20 条，共 22 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-21901
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