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CVE-2021-31362— Junos OS and Junos OS Evolved: An IS-IS adjacency might be taken down if a bad hello PDU is received for an existing adjacency causing a DoS

CVSS 6.5 · Medium EPSS 0.08% · P24
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I. Basic Information for CVE-2021-31362

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: An IS-IS adjacency might be taken down if a bad hello PDU is received for an existing adjacency causing a DoS
Source: NVD (National Vulnerability Database)
Vulnerability Description
A Protection Mechanism Failure vulnerability in RPD (routing protocol daemon) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause established IS-IS adjacencies to go down by sending a spoofed hello PDU leading to a Denial of Service (DoS) condition. Continued receipted of these spoofed PDUs will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.
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
保护机制失效
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS和Junos OS Evolved 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS和Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是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 Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Junos OS Evolved 存在安全漏洞，未经身份验证的攻击者可以通过发送恶意数据导致拒绝服
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 ~ 18.2R3-S8 -
Juniper NetworksJunos OS Evolved unspecified ~ 20.4R2-EVO -

II. Public POCs for CVE-2021-31362

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III. Intelligence Information for CVE-2021-31362

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Same Patch Batch · Juniper Networks · 2021-10-19 · 42 CVEs total

CVE-2021-313499.8 CRITICALSession Smart Router: Authentication Bypass Vulnerability
CVE-2021-313858.8 HIGHJunos OS: J-Web: A path traversal vulnerability allows an authenticated attacker to elevat
CVE-2021-313728.8 HIGHJunos OS: J-Web allows a locally authenticated attacker to escalate their privileges to ro
CVE-2021-313558.0 HIGHJunos OS: Stored Cross-Site Scripting (XSS) vulnerability in captive portal
CVE-2021-313738.0 HIGHJunos OS: SRX Series: Persistent XSS vulnerability in J-Web
CVE-2021-313567.8 HIGHJunos OS Evolved: Multiple shell-injection vulnerabilities in EVO UI wrapper scripts
CVE-2021-313577.8 HIGHJunos OS Evolved: shell-injection vulnerabilities in evo_tcpdump UI wrapper script
CVE-2021-313587.8 HIGHJunos OS Evolved: shell-injection vulnerabilities in evo_sftp UI wrapper script
CVE-2021-313597.8 HIGHJunos OS and Junos OS Evolved: Local Privilege Escalation vulnerability
CVE-2021-313507.5 HIGHJunos OS and Junos OS Evolved: Privilege escalation vulnerability in Juniper Extension Too
CVE-2021-313517.5 HIGHJunos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset
CVE-2021-313797.5 HIGHJunos OS: MX Series: MPC 7/8/9/10/11 cards with MAP-E: PFE halts when an attacker sends ma
CVE-2021-313537.5 HIGHJunos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update
CVE-2021-313767.5 HIGHJunos OS: ACX Series: Packet Forwarding Engine manager (FXPC) process crashes when process
CVE-2021-313747.5 HIGHJunos OS and Junos OS Evolved: RPD crash while processing a specially crafted BGP UPDATE o
CVE-2021-313837.5 HIGHJunos OS and Junos OS Evolved: In Point to MultiPoint (P2MP) scenarios receipt of various
CVE-2021-02997.5 HIGHJunos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet
CVE-2021-313687.5 HIGHJunos OS: EX2300 Series, EX3400 Series, and ACX710 might become unresponsive if the out-of
CVE-2021-02967.4 HIGHCTPView: HSTS not being enforced on CTPView server.
CVE-2021-313847.2 HIGHJunos OS: SRX Series: Under a specific device configuration an attacker can access the dev

Showing top 20 of 42 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-693

V. Comments for CVE-2021-31362

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