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CVE-2021-31353— Junos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update

Quick assessment

Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。 Juniper Networks Junos OS 存在安全漏洞，该漏洞源于瞻博网络 Junos OS 和 Junos OS Evolved 中的异常处理不当漏洞允许攻击者注入特定的 BGP 更新，导致路由协议守护程序 (RPD) 崩溃并重新启动，从而导致拒绝服务 (DoS)。 BGP 更新的持续接收和处理将

CVSS 7.5 · High EPSS 1.17% · P66
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I. Basic Information for CVE-2021-31353

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update
Source: CVE Program / CVE List V5
Vulnerability Description
An Improper Handling of Exceptional Conditions vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an attacker to inject a specific BGP update, causing the routing protocol daemon (RPD) to crash and restart, leading to a Denial of Service (DoS). Continued receipt and processing of the BGP update will create a sustained Denial of Service (DoS) condition. This issue affects very specific versions of Juniper Networks Junos OS: 19.3R3-S2; 19.4R3-S3; 20.2 versions 20.2R2-S3 and later, prior to 20.2R3-S2; 20.3 versions 20.3R2 and later, prior to 20.3R3; 20.4 versions 20.4R2 and later, prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS 20.1 is not affected by this issue. This issue also affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R2-S3-EVO, 20.4R3-EVO; 21.1-EVO versions prior to 21.1R2-EVO; 21.2-EVO versions prior to 21.2R2-EVO.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对异常条件的处理不恰当
Source: CVE Program / CVE List V5
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。 Juniper Networks Junos OS 存在安全漏洞，该漏洞源于瞻博网络 Junos OS 和 Junos OS Evolved 中的异常处理不当漏洞允许攻击者注入特定的 BGP 更新，导致路由协议守护程序 (RPD) 崩溃并重新启动，从而导致拒绝服务 (DoS)。 BGP 更新的持续接收和处理将
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 unspecified ~ 19.3R3-S2 -
Juniper Networks Junos OS Evolved unspecified ~ 20.4R2-S3-EVO, 20.4R3-EVO -

II. Public POCs for CVE-2021-31353

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III. Intelligence Information for CVE-2021-31353

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Vendor Advisories for CVE-2021-31353 (1)

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

CVE-2021-31349 9.8 CRITICAL Session Smart Router: Authentication Bypass Vulnerability
CVE-2021-31385 8.8 HIGH Junos OS: J-Web: A path traversal vulnerability allows an authenticated attacker to elevat
CVE-2021-31372 8.8 HIGH Junos OS: J-Web allows a locally authenticated attacker to escalate their privileges to ro
CVE-2021-31373 8.0 HIGH Junos OS: SRX Series: Persistent XSS vulnerability in J-Web
CVE-2021-31355 8.0 HIGH Junos OS: Stored Cross-Site Scripting (XSS) vulnerability in captive portal
CVE-2021-31356 7.8 HIGH Junos OS Evolved: Multiple shell-injection vulnerabilities in EVO UI wrapper scripts
CVE-2021-31359 7.8 HIGH Junos OS and Junos OS Evolved: Local Privilege Escalation vulnerability
CVE-2021-31358 7.8 HIGH Junos OS Evolved: shell-injection vulnerabilities in evo_sftp UI wrapper script
CVE-2021-31357 7.8 HIGH Junos OS Evolved: shell-injection vulnerabilities in evo_tcpdump UI wrapper script
CVE-2021-31376 7.5 HIGH Junos OS: ACX Series: Packet Forwarding Engine manager (FXPC) process crashes when process
CVE-2021-31379 7.5 HIGH Junos OS: MX Series: MPC 7/8/9/10/11 cards with MAP-E: PFE halts when an attacker sends ma
CVE-2021-31374 7.5 HIGH Junos OS and Junos OS Evolved: RPD crash while processing a specially crafted BGP UPDATE o
CVE-2021-31351 7.5 HIGH Junos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset
CVE-2021-31350 7.5 HIGH Junos OS and Junos OS Evolved: Privilege escalation vulnerability in Juniper Extension Too
CVE-2021-31383 7.5 HIGH Junos OS and Junos OS Evolved: In Point to MultiPoint (P2MP) scenarios receipt of various
CVE-2021-0299 7.5 HIGH Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet
CVE-2021-31368 7.5 HIGH Junos OS: EX2300 Series, EX3400 Series, and ACX710 might become unresponsive if the out-of
CVE-2021-0296 7.4 HIGH CTPView: HSTS not being enforced on CTPView server.
CVE-2021-31384 7.2 HIGH Junos OS: SRX Series: Under a specific device configuration an attacker can access the dev
CVE-2021-31375 7.2 HIGH Junos OS: Receipt of a specific BGP update may cause RPKI policy-checks to be bypassed

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-755

V. Comments for CVE-2021-31353

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