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CVE-2020-1668— Junos OS: EX2300 Series: High CPU load due to receipt of specific multicast packets on layer 2 interface

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 EX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。 Junos OS EX2300版本存在安全漏洞，攻击者可利用该漏洞可以触发致命错误通过层2接口组播数据包，以触发拒绝服务。

CVSS 6.5 · Medium EPSS 0.51% · P41
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I. Basic Information for CVE-2020-1668

Vulnerability Information
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Vulnerability Title
Junos OS: EX2300 Series: High CPU load due to receipt of specific multicast packets on layer 2 interface
Source: CVE Program / CVE List V5
Vulnerability Description
On Juniper Networks EX2300 Series, receipt of a stream of specific multicast packets by the layer2 interface can cause high CPU load, which could lead to traffic interruption. This issue occurs when multicast packets are received by the layer 2 interface. To check if the device has high CPU load due to this issue, the administrator can issue the following command: user@host> show chassis routing-engine Routing Engine status: ... Idle 2 percent the "Idle" value shows as low (2 % in the example above), and also the following command: user@host> show system processes summary ... PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND 11639 root 52 0 283M 11296K select 12:15 44.97% eventd 11803 root 81 0 719M 239M RUN 251:12 31.98% fxpc{fxpc} the eventd and the fxpc processes might use higher WCPU percentage (respectively 44.97% and 31.98% in the above example). This issue affects Juniper Networks Junos OS on EX2300 Series: 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S5; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S1, 19.4R3; 20.1 versions prior to 20.1R1-S2, 20.1R2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS EX 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS EX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。 Junos OS EX2300版本存在安全漏洞，攻击者可利用该漏洞可以触发致命错误通过层2接口组播数据包，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

Vendor Product Affected Versions CPE Subscribe
Juniper Networks Junos OS 18.1 ~ 18.1R3-S11 -

II. Public POCs for CVE-2020-1668

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III. Intelligence Information for CVE-2020-1668

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Vendor Advisories for CVE-2020-1668 (1)

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

CVE-2020-1656 8.8 HIGH Junos OS: When a DHCPv6 Relay-Agent is configured upon receipt of a specific DHCPv6 client
CVE-2020-1673 8.8 HIGH Junos OS: Reflected Cross-site Scripting vulnerability in J-Web and web based (HTTP/HTTPS)
CVE-2020-1660 8.3 HIGH Junos OS: MX Series: Receipt of specific packets can cause services card to restart when D
CVE-2020-1667 8.3 HIGH Junos OS: MX Series: Services card might restart due to a race condition when DNS filterin
CVE-2020-1675 8.3 HIGH Juniper Networks Mist Cloud UI: SAML authentication certificate vulnerability.
CVE-2020-1664 7.8 HIGH Junos OS: Buffer overflow vulnerability in device control daemon
CVE-2020-1657 7.5 HIGH Junos OS: SRX Series: An attacker sending spoofed packets to IPSec peers may cause a Denia
CVE-2020-1686 7.5 HIGH Junos OS: Kernel crash (vmcore) upon receipt of a malformed IPv6 packet.
CVE-2020-1684 7.5 HIGH Junos OS: SRX Series: High CPU load due to processing for HTTP traffic when Application Id
CVE-2020-1683 7.5 HIGH Junos OS: Memory leak leads to kernel crash (vmcore) due to SNMP polling
CVE-2020-1679 7.5 HIGH Junos OS: PTX/QFX Series: Kernel Routing Table (KRT) queue stuck after packet sampling a m
CVE-2020-1672 7.5 HIGH Junos OS: jdhcpd process crash when processing a specific DHCPDv6 packet in DHCPv6 relay c
CVE-2020-1662 7.5 HIGH Junos OS and Junos OS Evolved: RPD crash due to BGP session flapping.
CVE-2020-1671 7.5 HIGH Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash.
CVE-2020-1676 7.2 HIGH Juniper Networks Mist Cloud UI: SAML authentication response handling vulnerability.
CVE-2020-1677 7.2 HIGH Juniper Networks Mist Cloud UI: SAML authentication attribute elements handling vulnerabil
CVE-2020-1666 6.6 MEDIUM Junos OS Evolved: 'console log-out-on-disconnect' fails to terminate session on console ca
CVE-2020-1681 6.5 MEDIUM Junos OS Evolved: Receipt of a specifically malformed NDP packet could lead to Denial of S
CVE-2020-1689 6.5 MEDIUM Junos OS: EX4300-MP/EX4600/QFX5K Series: High CPU load due to receipt of specific layer 2
CVE-2020-1688 6.5 MEDIUM Junos 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-400

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