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CVE-2021-31371— Junos OS: QFX5000 Series: Traffic from the network internal to the device (128.0.0.0) may be forwarded to egress interfaces.

CVSS 5.3 · Medium EPSS 0.21% · P44
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I. Basic Information for CVE-2021-31371

Vulnerability Information
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Vulnerability Title
Junos OS: QFX5000 Series: Traffic from the network internal to the device (128.0.0.0) may be forwarded to egress interfaces.
Source: NVD (National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS uses the 128.0.0.0/2 subnet for internal communications between the RE and PFEs. It was discovered that packets utilizing these IP addresses may egress an QFX5000 Series switch, leaking configuration information such as heartbeats, kernel versions, etc. out to the Internet, leading to an information exposure vulnerability. This issue affects Juniper Networks Junos OS on QFX5110, QFX5120, QFX5200, QFX5210 Series, and QFX5100 with QFX 5e Series image installed: All versions prior to 17.3R3-S12; 18.1 versions prior to 18.1R3-S13; 18.3 versions prior to 18.3R3-S5; 19.1 versions prior to 19.1R3-S6; 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, 19.4R3-S5; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2;
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:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
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。 Juniper Networks Junos OS 存在信息泄露漏洞，该漏洞源于瞻博网络 Junos OS 使用 128.0.0.0/2 子网在 RE 和 PFE 之间进行内部通信。发现利用这些IP地址的数据包可能会从QFX5110交换机出口，将心跳、内核版本等配置信息泄露到互联网，导致信息泄露漏洞。
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-S12 -

II. Public POCs for CVE-2021-31371

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III. Intelligence Information for CVE-2021-31371

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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-200

V. Comments for CVE-2021-31371

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