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CVE-2021-0291— Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated attacker which sends a high rate of specific traffic to cause a partial Denial of Service

CVSS 6.5 · Medium EPSS 0.29% · P52
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I. Basic Information for CVE-2021-0291

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: A vulnerability allows a network based unauthenticated attacker which sends a high rate of specific traffic to cause a partial Denial of Service
Source: NVD (National Vulnerability Database)
Vulnerability Description
An Exposure of System Data vulnerability in Juniper Networks Junos OS and Junos OS Evolved, where a sensitive system-level resource is not being sufficiently protected, allows a network-based unauthenticated attacker to send specific traffic which partially reaches this resource. A high rate of specific traffic may lead to a partial Denial of Service (DoS) as the CPU utilization of the RE is significantly increased. The SNMP Agent Extensibility (agentx) process should only be listening to TCP port 705 on the internal routing instance. External connections destined to port 705 should not be allowed. This issue affects: Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13, 17.4R3-S5; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2. Juniper Networks Junos OS Evolved versions prior to 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 13.2R1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
将系统数据暴露到未授权控制的范围
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 信息泄露漏洞
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 存在信息泄露漏洞，该漏洞源于系统数据漏洞暴露，其中敏感的系统级资源没有得到充分保护，允许基于网络的未经身份验证的攻击者发送部分到达此资源的特定流量。以下产品及版本受到影响：Junos OS 15.1, 17.3, 17.4, 18.3, 18.4, 19.1, 19.2, 19.3, 19.
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 ~ 13.2R1 -
Juniper NetworksJunos OS Evolved unspecified ~ 20.3R2-EVO -

II. Public POCs for CVE-2021-0291

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III. Intelligence Information for CVE-2021-0291

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Same Patch Batch · Juniper Networks · 2021-07-15 · 19 CVEs total

CVE-2021-02769.8 CRITICALSteel-Belted Radius Carrier Edition: Remote code execution vulnerability when EAP Authenti
CVE-2021-02778.8 HIGHJunos OS and Junos OS Evolved: LLDP Out-of-Bounds Read vulnerability in l2cpd
CVE-2021-02788.8 HIGHJunos OS: J-Web allows a locally authenticated attacker to escalate their privileges to ro
CVE-2021-02798.6 HIGHContrail Cloud: Hardcoded credentials for RabbitMQ service
CVE-2021-02857.5 HIGHJunos OS: QFX5000 Series and EX4600 Series: Continuous traffic destined to a device config
CVE-2021-02807.5 HIGHJunos OS: PTX Series, QFX10K Series: Upon receipt of specific packets BFD sessions might f
CVE-2021-02827.5 HIGHJunos OS: RPD crash while processing a specific BGP UPDATE when Multipath or add-path feat
CVE-2021-02837.5 HIGHJunos OS: Upon receipt of specific sequences of genuine packets destined to the device the
CVE-2021-02867.5 HIGHJunos OS Evolved: Specially crafted packets may cause the AFT manager process to crash and
CVE-2021-02876.5 MEDIUMJunos OS and Junos OS Evolved: RPD could crash in SR-ISIS/MPLS environment due to a flap o
CVE-2021-02886.5 MEDIUMJunos OS: MX Series, EX9200 Series: FPC may crash upon receipt of specific MPLS packet aff
CVE-2021-02896.5 MEDIUMJunos OS: User-defined ARP Policer isn't applied on Aggregated Ethernet (AE) interface unt
CVE-2021-02906.5 MEDIUMJunos OS: MX Series, EX9200 Series, SRX4600: Ethernet interface vulnerable to specially cr
CVE-2021-02926.5 MEDIUMJunos OS Evolved: Memory leak in arpd or ndp processes can lead to Denial of Service (DoS)
CVE-2021-02956.1 MEDIUMJunos OS: QFX10K Series: Denial of Service (DoS) upon receipt of DVMRP packets received on
CVE-2021-02815.9 MEDIUMJunos OS and Junos OS Evolved: Specific packets can trigger rpd crash when BGP Origin Vali
CVE-2021-02935.5 MEDIUMJunos OS: Out-of-memory condition and crashes can occur after executing a certain CLI comm
CVE-2021-02945.3 MEDIUMJunos OS: QFX5000 Series and EX4600 Series: Enhanced storm control might not work leading

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-497

V. Comments for CVE-2021-0291

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