CVE-2021-0294— Junos OS: QFX5000 Series and EX4600 Series: Enhanced storm control might not work leading to partial Denial of Service
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I. Basic Information for CVE-2021-0294
Vulnerability Information
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Vulnerability Title
Junos OS: QFX5000 Series and EX4600 Series: Enhanced storm control might not work leading to partial Denial of Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in Juniper Networks Junos OS, which only affects the release 18.4R2-S5, where a function is inconsistently implemented on Juniper Networks Junos QFX5000 Series and EX4600 Series, and if "storm-control enhanced" is configured, can lead to the enhanced storm control filter group not be installed. It will cause storm control not to work hence allowing an attacker to cause high CPU usage or packet loss issues by sending a large amount of broadcast or unknown unicast packets arriving the device. This issue affects Juniper Networks QFX5100, QFX5110, QFX5120, QFX5200, QFX5210, EX4600, and EX4650, and QFX5100 with QFX 5e Series image installed. QFX5130 and QFX5220 are not affected from this issue. This issue affects Juniper Networks Junos OS 18.4R2-S5 on QFX5000 Series and EX4600 Series. No other product or platform is affected by this vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用具有不一致性实现的函数
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Junos OS存在安全漏洞，目前暂无该漏洞的详细信息，详情请关注厂商主页。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Juniper Networks | Junos OS | 18.4R2-S5 | - |
II. Public POCs for CVE-2021-0294
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Juniper Networks · 2021-07-15 · 19 CVEs total
| CVE-2021-0276 | 9.8 CRITICAL | Steel-Belted Radius Carrier Edition: Remote code execution vulnerability when EAP Authenti |
| CVE-2021-0277 | 8.8 HIGH | Junos OS and Junos OS Evolved: LLDP Out-of-Bounds Read vulnerability in l2cpd |
| CVE-2021-0278 | 8.8 HIGH | Junos OS: J-Web allows a locally authenticated attacker to escalate their privileges to ro |
| CVE-2021-0279 | 8.6 HIGH | Contrail Cloud: Hardcoded credentials for RabbitMQ service |
| CVE-2021-0285 | 7.5 HIGH | Junos OS: QFX5000 Series and EX4600 Series: Continuous traffic destined to a device config |
| CVE-2021-0280 | 7.5 HIGH | Junos OS: PTX Series, QFX10K Series: Upon receipt of specific packets BFD sessions might f |
| CVE-2021-0282 | 7.5 HIGH | Junos OS: RPD crash while processing a specific BGP UPDATE when Multipath or add-path feat |
| CVE-2021-0283 | 7.5 HIGH | Junos OS: Upon receipt of specific sequences of genuine packets destined to the device the |
| CVE-2021-0286 | 7.5 HIGH | Junos OS Evolved: Specially crafted packets may cause the AFT manager process to crash and |
| CVE-2021-0287 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: RPD could crash in SR-ISIS/MPLS environment due to a flap o |
| CVE-2021-0288 | 6.5 MEDIUM | Junos OS: MX Series, EX9200 Series: FPC may crash upon receipt of specific MPLS packet aff |
| CVE-2021-0289 | 6.5 MEDIUM | Junos OS: User-defined ARP Policer isn't applied on Aggregated Ethernet (AE) interface unt |
| CVE-2021-0290 | 6.5 MEDIUM | Junos OS: MX Series, EX9200 Series, SRX4600: Ethernet interface vulnerable to specially cr |
| CVE-2021-0291 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated atta |
| CVE-2021-0292 | 6.5 MEDIUM | Junos OS Evolved: Memory leak in arpd or ndp processes can lead to Denial of Service (DoS) |
| CVE-2021-0295 | 6.1 MEDIUM | Junos OS: QFX10K Series: Denial of Service (DoS) upon receipt of DVMRP packets received on |
| CVE-2021-0281 | 5.9 MEDIUM | Junos OS and Junos OS Evolved: Specific packets can trigger rpd crash when BGP Origin Vali |
| CVE-2021-0293 | 5.5 MEDIUM | Junos OS: Out-of-memory condition and crashes can occur after executing a certain CLI comm |
IV. Related Vulnerabilities
Same product: Junos OS
- CVE-2026-33791
Junos OS and Junos OS Evolved: Execution of crafted CLI comm - CVE-2026-33790
Junos OS: SRX Series: In a NAT64 configuration, receipt of a - CVE-2026-33787
Junos OS: SRX1500, SRX4100, SRX4200, SRX4600: When a specifi - CVE-2026-33785
Junos OS: MX Series: Missing Authorization for specific 'req - CVE-2026-33781
Junos OS: EX Series, QFX Series: In a VXLAN scenario when sp
Same vendor: Juniper Networks
- CVE-2026-33791
Junos OS and Junos OS Evolved: Execution of crafted CLI comm - CVE-2026-33790
Junos OS: SRX Series: In a NAT64 configuration, receipt of a - CVE-2026-33787
Junos OS: SRX1500, SRX4100, SRX4200, SRX4600: When a specifi - CVE-2026-33785
Junos OS: MX Series: Missing Authorization for specific 'req - CVE-2026-33784
JSI Virtual Lightweight Collector: Default password is not r
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