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CVE-2020-1685— Junos OS: EX4600, QFX5K Series: Stateless firewall filter matching 'user-vlan-id' will cause incomplete discard action

CVSS 5.8 · Medium EPSS 0.21% · P43
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I. Basic Information for CVE-2020-1685

Vulnerability Information
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Vulnerability Title
Junos OS: EX4600, QFX5K Series: Stateless firewall filter matching 'user-vlan-id' will cause incomplete discard action
Source: NVD (National Vulnerability Database)
Vulnerability Description
When configuring stateless firewall filters in Juniper Networks EX4600 and QFX 5000 Series devices using Virtual Extensible LAN protocol (VXLAN), the discard action will fail to discard traffic under certain conditions. Given a firewall filter configuration similar to: family ethernet-switching { filter L2-VLAN { term ALLOW { from { user-vlan-id 100; } then { accept; } } term NON-MATCH { then { discard; } } when there is only one term containing a 'user-vlan-id' match condition, and no other terms in the firewall filter except discard, the discard action for non-matching traffic will only discard traffic with the same VLAN ID specified under 'user-vlan-id'. Other traffic (e.g. VLAN ID 200) will not be discarded. This unexpected behavior can lead to unintended traffic passing through the interface where the firewall filter is applied. This issue only affects systems using VXLANs. This issue affects Juniper Networks Junos OS on QFX5K Series: 18.1 versions prior to 18.1R3-S7, except 18.1R3; 18.2 versions prior to 18.2R2-S7, 18.2R3-S1; 18.3 versions prior to 18.3R1-S5, 18.3R2-S4, 18.3R3; 18.4 versions prior to 18.4R1-S7, 18.4R2-S1, 18.4R3; 19.1 versions prior to 19.1R1-S5, 19.1R2; 19.2 versions prior to 19.2R1-S5, 19.2R2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过差异性导致的信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS EX和Junos OS EX/QFX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS EX/QFX和Junos OS EX都是美国瞻博网络（Juniper Networks）公司的产品。Junos OS EX/QFX是一款交换机。该产品为接入交换机的任意两个网络节点提供独享的电信号通路。Junos OS EX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 EX/QFX存在安全漏洞，攻击者可利用该漏洞通过user-vlan-id绕过限制，以触发拒绝服务。
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 18.1R3 -

II. Public POCs for CVE-2020-1685

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III. Intelligence Information for CVE-2020-1685

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Same Patch Batch · Juniper Networks · 2020-10-16 · 30 CVEs total

CVE-2020-16568.8 HIGHJunos OS: When a DHCPv6 Relay-Agent is configured upon receipt of a specific DHCPv6 client
CVE-2020-16738.8 HIGHJunos OS: Reflected Cross-site Scripting vulnerability in J-Web and web based (HTTP/HTTPS)
CVE-2020-16608.3 HIGHJunos OS: MX Series: Receipt of specific packets can cause services card to restart when D
CVE-2020-16678.3 HIGHJunos OS: MX Series: Services card might restart due to a race condition when DNS filterin
CVE-2020-16758.3 HIGHJuniper Networks Mist Cloud UI: SAML authentication certificate vulnerability.
CVE-2020-16647.8 HIGHJunos OS: Buffer overflow vulnerability in device control daemon
CVE-2020-16577.5 HIGHJunos OS: SRX Series: An attacker sending spoofed packets to IPSec peers may cause a Denia
CVE-2020-16867.5 HIGHJunos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet.
CVE-2020-16847.5 HIGHJunos OS: SRX Series: High CPU load due to processing for HTTP traffic when Application Id
CVE-2020-16837.5 HIGHJunos OS: Memory leak leads to kernel crash (vmcore) due to SNMP polling
CVE-2020-16797.5 HIGHJunos OS: PTX/QFX Series: Kernel Routing Table (KRT) queue stuck after packet sampling a m
CVE-2020-16727.5 HIGHJunos OS: jdhcpd process crash when processing a specific DHCPDv6 packet in DHCPv6 relay c
CVE-2020-16717.5 HIGHJunos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash.
CVE-2020-16627.5 HIGHJunos OS and Junos OS Evolved: RPD crash due to BGP session flapping.
CVE-2020-16767.2 HIGHJuniper Networks Mist Cloud UI: SAML authentication response handling vulnerability.
CVE-2020-16777.2 HIGHJuniper Networks Mist Cloud UI: SAML authentication attribute elements handling vulnerabil
CVE-2020-16666.6 MEDIUMJunos OS Evolved: 'console log-out-on-disconnect' fails to terminate session on console ca
CVE-2020-16706.5 MEDIUMJunos OS: EX4300 Series: High CPU load due to receipt of specific IPv4 packets
CVE-2020-16896.5 MEDIUMJunos OS: EX4300-MP/EX4600/QFX5K Series: High CPU load due to receipt of specific layer 2
CVE-2020-16886.5 MEDIUMJunos OS: SRX and NFX Series: Insufficient Web API private key protection

Showing top 20 of 30 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-203

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