CVE-2026-33799— Juniper Networks Junos OS 缓冲区错误漏洞
一分钟漏洞结论
影响对象
Juniper Networks Junos OS
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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和Junos OS Evolved存在缓冲区错误漏洞，该漏洞源于SNMP daemon (snmpd)中的Out-of-bounds Write漏洞，可能导致经过身份验证的网络攻击者通过发送特定有效的SNMPv3查询触发内存泄漏，长期连续接收这些查询将导致snmpd进程内存耗尽，造成进程崩溃并重启
影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Juniper Networks | Junos OS | < 21.2R3-S8 |
affected |
21.4< 21.4R3-S7 |
affected | ||
22.1< 22.1R3-S6 |
affected | ||
22.2< 22.2R3-S4 |
affected | ||
22.3< 22.3R3-S3 |
affected | ||
22.4< 22.4R3-S2 |
affected | ||
23.2< 23.2R2 |
affected | ||
23.4< 23.4R2 |
affected | ||
| Juniper Networks | Junos OS Evolved | < 21.2R3-S8-EVO |
affected |
21.4< 21.4R3-S7-EVO |
affected | ||
22.1< 22.1* |
affected | ||
22.2< 22.2R3-S4-EVO |
affected | ||
22.3< 22.3R3-S3-EVO |
affected | ||
22.4< 22.4* |
affected | ||
23.2< 23.2R2-EVO |
affected | ||
23.4< 23.4R2-EVO |
affected |
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一、 漏洞 CVE-2026-33799 基础信息
漏洞信息
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Vulnerability Title
Junos OS and Junos OS Evolved: Receipt of a specific SNMPv3 request results in memory leak and eventual snmpd crash
来源: CVE Program / CVE List V5
Vulnerability Description
An Out-of-bounds Write vulnerability in the SNMP daemon (snmpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated network-based attacker sending specific valid SNMPv3 queries to trigger a memory leak. Over time, continuous receipt of these queries will result in snmpd process memory exhaustion, resulting in a process crash and restart, impacting the ability to monitor the system via SNMP.
Memory usage can be monitored using the following command:
user@device> show system processes extensive | match snmpd
This issue affects:
Junos OS:
* all versions before 21.2R3-S8;
* from 21.4 before 21.4R3-S7;
* from 22.1 before 22.1R3-S6;
* from 22.2 before 22.2R3-S4;
* from 22.3 before 22.3R3-S3;
* from 22.4 before 22.4R3-S2;
* from 23.2 before 23.2R2;
* from 23.4 before 23.4R2.
Junos OS Evolved:
* all versions before 21.2R3-S8-EVO;
* from 21.4 before 21.4R3-S7-EVO;
* all versions of 22.1-EVO,
* from 22.2 before 22.2R3-S4-EVO;
* from 22.3 before 22.3R3-S3-EVO;
* all versions of 22.4-EVO,
* from 23.2 before 23.2R2-EVO;
* from 23.4 before 23.4R2-EVO.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
来源: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 缓冲区错误漏洞
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和Junos OS Evolved存在缓冲区错误漏洞，该漏洞源于SNMP daemon (snmpd)中的Out-of-bounds Write漏洞，可能导致经过身份验证的网络攻击者通过发送特定有效的SNMPv3查询触发内存泄漏，长期连续接收这些查询将导致snmpd进程内存耗尽，造成进程崩溃并重启
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 | 0 ~ 21.2R3-S8 | - |
|
| Juniper Networks | Junos OS Evolved | 0 ~ 21.2R3-S8-EVO | - |
|
二、漏洞 CVE-2026-33799 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-33799 厂商安全公告 (1)
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 |
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IV. Related Vulnerabilities
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