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CVE-2021-0221— Junos OS: QFX Series: Traffic loop Denial of Service (DoS) upon receipt of specific IP multicast traffic

CVSS 6.5 · Medium EPSS 0.08% · P24
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I. Basic Information for CVE-2021-0221

Vulnerability Information
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Vulnerability Title
Junos OS: QFX Series: Traffic loop Denial of Service (DoS) upon receipt of specific IP multicast traffic
Source: NVD (National Vulnerability Database)
Vulnerability Description
In an EVPN/VXLAN scenario, if an IRB interface with a virtual gateway address (VGA) is configured on a PE, a traffic loop may occur upon receipt of specific IP multicast traffic. The traffic loop will cause interface traffic to increase abnormally, ultimately leading to a Denial of Service (DoS) in packet processing. The following command could be used to monitor the interface traffic: user@junos> monitor interface traffic Interface Link Input packets (pps) Output packets (pps) et-0/0/1 Up 6492089274364 (70994959) 6492089235319 (70994956) et-0/0/25 Up 343458103 (1) 156844 (0) ae0 Up 9132519197257 (70994959) 9132519139454 (70994956) This issue affects Juniper Networks Junos OS on QFX Series: all versions prior to 17.3R3-S10; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R2-S5, 18.4R3-S5; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S3; 19.2 versions prior to 19.2R1-S5, 19.2R3-S1; 19.3 versions prior to 19.3R2-S5, 19.3R3; 19.4 versions prior to 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R1-S2, 20.2R2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对异常条件检查或处理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS QFX 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 QFX 存在安全漏洞，攻击者可利用该漏洞通过Junos QFX的IP多播流量循环触发过载，从而触发拒绝服务。以下产品及版本受到影响：Junos OS on QFX Series: all versions prior to 17.3R3-S10; 17.4 versions prior to
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

VendorProductAffected VersionsCPESubscribe
Juniper NetworksJunos OS unspecified ~ 17.3R3-S10 -

II. Public POCs for CVE-2021-0221

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III. Intelligence Information for CVE-2021-0221

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Same Patch Batch · Juniper Networks · 2021-01-15 · 19 CVEs total

CVE-2021-021110.0 CRITICALJunos OS and Junos OS Evolved: Upon receipt of a specific BGP FlowSpec message network tra
CVE-2021-02088.8 HIGHJunos OS and Junos OS Evolved: In bidirectional LSP configurations, on MPLS egress router
CVE-2021-02038.6 HIGHJunos OS: EX and QFX5K Series: Storm Control does not work as expected when Redundant Trun
CVE-2021-02047.8 HIGHJunos OS: dexp Local Privilege Escalation vulnerabilities in SUID binaries
CVE-2021-02187.8 HIGHJunos OS: Command injection vulnerability in license-check daemon
CVE-2021-02237.8 HIGHJunos OS: telnetd.real Local Privilege Escalation vulnerabilities in SUID binaries
CVE-2021-02067.5 HIGHJunos OS: NFX Series, SRX Series: PFE may crash upon receipt of specific packet when SSL P
CVE-2021-02077.5 HIGHNFX250, NFX350, QFX5K Series, EX2300 Series, EX3400 Series, EX4300 Multigigabit, EX4600 Se
CVE-2021-02027.5 HIGHJunos OS: MX Series, EX9200 Series: Trio-based MPC memory leak when Integrated Routing and
CVE-2021-02177.4 HIGHJunos OS: EX Series and QFX Series: Memory leak issue processing specific DHCP packets
CVE-2021-02227.4 HIGHJunos OS: Upon receipt of certain protocol packets with invalid payloads a self-propagatin
CVE-2021-02106.8 MEDIUMJunos OS: Privilege escalation in J-Web due to arbitrary command and code execution via in
CVE-2021-02206.8 MEDIUMJunos Space: Shared secrets stored in recoverable format and directly exposed through the
CVE-2021-02196.7 MEDIUMJunos OS: Command injection vulnerability in 'request system software' CLI command
CVE-2021-02096.5 MEDIUMJunos OS Evolved: Receipt of certain valid BGP update packets from BGP peers may cause RPD
CVE-2021-02156.5 MEDIUMJunos OS: EX Series, QFX Series, SRX Branch Series, MX Series: Memory leak in packet forwa
CVE-2021-02055.8 MEDIUMJunos OS: MX Series: Dynamic filter fails to match IPv6 prefix
CVE-2021-02125.0 MEDIUMContrail Networking: Administrator credentials are exposed in a plaintext file

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-703

V. Comments for CVE-2021-0221

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