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CVE-2021-31373— Junos OS: SRX Series: Persistent XSS vulnerability in J-Web

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 存在跨站脚本漏洞，该漏洞源于SRX 系列 J-Web 界面上瞻博网络 Junos OS 中的持久性跨站点脚本 (XSS) 漏洞可能允许远程身份验证用户注入持久性和恶意脚本。攻击者可以利用此漏洞从 Web 管理会话中窃取敏感数据和凭据，或劫持其他用户的活动会话

CVSS 8.0 · High EPSS 0.81% · P55

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2021-31373

Vulnerability Information
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Vulnerability Title
Junos OS: SRX Series: Persistent XSS vulnerability in J-Web
Source: CVE Program / CVE List V5
Vulnerability Description
A persistent Cross-Site Scripting (XSS) vulnerability in Juniper Networks Junos OS on SRX Series, J-Web interface may allow a remote authenticated user to inject persistent and malicious scripts. An attacker can exploit this vulnerability to steal sensitive data and credentials from a web administration session, or hijack another user's active session to perform administrative actions. This issue affects: Juniper Networks Junos OS on SRX Series: 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R2-S4, 19.4R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R2-S1, 20.3R3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS 跨站脚本漏洞
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 存在跨站脚本漏洞，该漏洞源于SRX 系列 J-Web 界面上瞻博网络 Junos OS 中的持久性跨站点脚本 (XSS) 漏洞可能允许远程身份验证用户注入持久性和恶意脚本。攻击者可以利用此漏洞从 Web 管理会话中窃取敏感数据和凭据，或劫持其他用户的活动会话
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 18.2 ~ 18.2R3-S8 -

II. Public POCs for CVE-2021-31373

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III. Intelligence Information for CVE-2021-31373

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Vendor Advisories for CVE-2021-31373 (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-2021-31355 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-2021-31357 7.8 HIGH Junos OS Evolved: shell-injection vulnerabilities in evo_tcpdump UI wrapper script
CVE-2021-31358 7.8 HIGH Junos OS Evolved: shell-injection vulnerabilities in evo_sftp UI wrapper script
CVE-2021-31359 7.8 HIGH Junos OS and Junos OS Evolved: Local Privilege Escalation vulnerability
CVE-2021-31383 7.5 HIGH Junos OS and Junos OS Evolved: In Point to MultiPoint (P2MP) scenarios receipt of various
CVE-2021-31350 7.5 HIGH Junos OS and Junos OS Evolved: Privilege escalation vulnerability in Juniper Extension Too
CVE-2021-31351 7.5 HIGH Junos OS: MX Series: Receipt of specific packet on MS-MPC/MS-MIC causes line card reset
CVE-2021-31379 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-2021-31353 7.5 HIGH Junos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update
CVE-2021-31376 7.5 HIGH Junos OS: ACX Series: Packet Forwarding Engine manager (FXPC) process crashes when process
CVE-2021-31374 7.5 HIGH Junos OS and Junos OS Evolved: RPD crash while processing a specially crafted BGP UPDATE o
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-20

V. Comments for CVE-2021-31373

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