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CVE-2021-0237— Junos OS: EX4300-MP/EX4600/EX4650/QFX5K Series: Packet Forwarding Engine manager (FXPC) process crashes when deployed in a Virtual Chassis (VC) configuration

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 EX4300和Juniper Networks EX4600都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks EX4300是一款4300系列企业级交换机。Juniper Networks EX4600是一款4600系列企业级交换机。 Juniper Networks EX4300-MP Series, EX4600 Series, EX4650 Series, QFX5K Series 存在输入验证错误漏洞，该漏洞允许远程攻

CVSS 6.5 · Medium EPSS 0.38% · P31
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I. Basic Information for CVE-2021-0237

Vulnerability Information
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Vulnerability Title
Junos OS: EX4300-MP/EX4600/EX4650/QFX5K Series: Packet Forwarding Engine manager (FXPC) process crashes when deployed in a Virtual Chassis (VC) configuration
Source: CVE Program / CVE List V5
Vulnerability Description
On Juniper Networks EX4300-MP Series, EX4600 Series, EX4650 Series, QFX5K Series deployed as a Virtual Chassis with a specific Layer 2 circuit configuration, Packet Forwarding Engine manager (FXPC) process may crash and restart upon receipt of specific layer 2 frames. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on EX4300-MP Series, EX4600 Series, EX4650 Series, QFX5K Series 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R2-S13, 17.4R3-S4, 17.4R3-S5; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R2-S7, 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R2-S4, 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2, 20.2R3; 20.3 versions prior to 20.3R1-S2, 20.3R2;
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
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper多款产品 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks EX4300和Juniper Networks EX4600都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks EX4300是一款4300系列企业级交换机。Juniper Networks EX4600是一款4600系列企业级交换机。 Juniper Networks EX4300-MP Series, EX4600 Series, EX4650 Series, QFX5K Series 存在输入验证错误漏洞，该漏洞允许远程攻
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 15.1 ~ 15.1R7-S9 -

II. Public POCs for CVE-2021-0237

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III. Intelligence Information for CVE-2021-0237

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Vendor Advisories for CVE-2021-0237 (1)

Same Patch Batch · Juniper Networks · 2021-04-22 · 53 CVEs total

CVE-2021-0248 10.0 CRITICAL NFX Series: Hard-coded credentials allow an attacker to take control of any instance throu
CVE-2021-0254 9.8 CRITICAL Junos OS: Remote code execution vulnerability in overlayd service
CVE-2021-0275 8.8 HIGH Junos OS: J-Web: Cross-site scripting attack allows an attacker to gain control of another
CVE-2021-0268 8.8 HIGH Junos OS: J-Web has an Improper Neutralization of CRLF Sequences in its HTTP Headers which
CVE-2021-0269 8.8 HIGH Junos OS: J-Web can be compromised through reflected client-side HTTP parameter pollution
CVE-2021-0251 8.6 HIGH Junos OS: MX Series with MS-PIC, MS-SPC3, MS-MIC or MS-MPC: The BRAS Subscriber Services s
CVE-2021-0249 8.1 HIGH Junos OS: SRX Series: A remote attacker may be able to cause a PFE buffer overflow to arbi
CVE-2021-0266 8.1 HIGH cSRX: Use of Hard-coded Cryptographic Keys allows an attacker to take control of the devic
CVE-2021-0265 8.1 HIGH Contrail Insights: The REST API implementation allows an unauthenticated remote attacker t
CVE-2021-0252 7.8 HIGH Junos OS: NFX Series: Local Code Execution Vulnerability in JDMD Leads to Privilege Escala
CVE-2021-0245 7.8 HIGH Junos OS: Junos Fusion: Hard-coded credentials on satellite devices allows a locally authe
CVE-2021-0253 7.8 HIGH Junos OS: NFX Series: Local Command Execution Vulnerability in JDMD Leads to Privilege Esc
CVE-2021-0270 7.5 HIGH Junos OS: PTX Series, QFX10K Series: A PTX/QFX FPC may restart unexpectedly with the "inli
CVE-2021-0227 7.5 HIGH Junos OS: SRX Series: Denial of Service in J-Web upon receipt of crafted HTTP packets
CVE-2021-0233 7.5 HIGH Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while process
CVE-2021-0230 7.5 HIGH Junos OS: SRX Series: Memory leak when querying Aggregated Ethernet (AE) interface statist
CVE-2021-0250 7.5 HIGH Junos OS and Junos OS Evolved: An attacker sending a specific crafted BGP update message w
CVE-2021-0261 7.5 HIGH Junos OS: Denial of Service vulnerability in J-Web and web based (HTTP/HTTPS) services cau
CVE-2021-0267 7.4 HIGH Junos OS: Receipt of a crafted DHCP packet will cause the jdhcpd DHCP service to core.
CVE-2021-0240 7.4 HIGH Junos OS: Receipt of malformed DHCPv6 packets causes jdhcpd to crash and restart.

Showing top 20 of 53 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks

V. Comments for CVE-2021-0237

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