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CVE-2022-22202— Junos OS: PTX Series: FPCs may restart unexpectedly upon receipt of specific MPLS packets with certain multi-unit interface configurations

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 PTX 存在安全漏洞，该漏洞源于异常条件处理不当允许未经身份验证的基于 MPLS 的攻击者导致拒绝服务 (DoS) 通过触发 FPC 崩溃并重新启动，以下产品和版本受到影响：Junos OS 的所有版本、PTX 系列版本。

CVSS 6.5 · Medium EPSS 0.54% · P43

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-22202

Vulnerability Information
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Vulnerability Title
Junos OS: PTX Series: FPCs may restart unexpectedly upon receipt of specific MPLS packets with certain multi-unit interface configurations
Source: CVE Program / CVE List V5
Vulnerability Description
An Improper Handling of Exceptional Conditions vulnerability on specific PTX Series devices, including the PTX1000, PTX3000 (NextGen), PTX5000, PTX10002-60C, PTX10008, and PTX10016 Series, in Juniper Networks Junos OS allows an unauthenticated MPLS-based attacker to cause a Denial of Service (DoS) by triggering the dcpfe process to crash and FPC to restart. On affected PTX Series devices, processing specific MPLS packets received on an interface with multiple units configured may cause FPC to restart unexpectedly. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue only affects PTX Series devices utilizing specific FPCs found on PTX1000, PTX3000 (NextGen), PTX5000, PTX10002-60C, PTX10008, and PTX10016 Series devices, only if multiple units are configured on the ingress interface, and at least one unit has 'family mpls' *not* configured. See the configuration sample below for more information. No other platforms are affected by this vulnerability. This issue affects: Juniper Networks Junos OS on PTX Series: All versions prior to 19.1R3-S9; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S6; 19.4 versions prior to 19.4R3-S8; 20.1 versions prior to 20.1R3-S4; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S4; 20.4 versions prior to 20.4R3-S4; 21.1 versions prior to 21.1R3-S2; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R2.
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
对异常条件的处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS PTX 安全漏洞
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 PTX 存在安全漏洞，该漏洞源于异常条件处理不当允许未经身份验证的基于 MPLS 的攻击者导致拒绝服务 (DoS) 通过触发 FPC 崩溃并重新启动，以下产品和版本受到影响：Junos OS 的所有版本、PTX 系列版本。
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 unspecified ~ 19.1R3-S9 -

II. Public POCs for CVE-2022-22202

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III. Intelligence Information for CVE-2022-22202

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Vendor Advisories for CVE-2022-22202 (1)

Same Patch Batch · Juniper Networks · 2022-07-20 · 15 CVEs total

CVE-2022-22221 7.8 HIGH Junos OS: SRX and EX Series: Local privilege escalation flaw in "download" functionality
CVE-2022-22205 7.5 HIGH Junos OS: SRX Series: An FPC memory leak can occur in an APBR scenario
CVE-2022-22206 7.5 HIGH Junos OS: SRX series: The PFE will crash when specific traffic is scanned by Enhanced Web
CVE-2022-22207 7.5 HIGH Junos OS: MX Series with MPC11: In a GNF / node slicing scenario gathering AF interface st
CVE-2022-22209 7.5 HIGH Junos OS: RIB and PFEs can get out of sync due to a memory leak caused by interface flaps
CVE-2022-22212 7.5 HIGH Junos OS Evolved: A high rate of specific hostbound traffic will cause unexpected hostboun
CVE-2022-22203 6.5 MEDIUM Junos OS: EX4600 Series and QFX5000 Series: Receipt of specific traffic will lead to an fx
CVE-2022-22210 6.5 MEDIUM Junos OS: QFX5000 Series and MX Series: An l2alm crash leading to an FPC crash can be obse
CVE-2022-22214 6.5 MEDIUM Junos OS and Junos OS Evolved: In an MPLS scenario upon receipt of a specific IPv6 packet
CVE-2022-22215 6.5 MEDIUM Junos OS and Junos OS Evolved: /var/run/<pid>.env files are potentially not deleted during
CVE-2022-22217 6.1 MEDIUM Junos OS: QFX10K Series: Denial of Service (DoS) upon receipt of crafted MLD packets on mu
CVE-2022-22213 5.9 MEDIUM Junos OS and Junos OS Evolved: Denial of Service (DoS) vulnerability in RPD upon receipt o
CVE-2022-22204 5.3 MEDIUM Junos OS: MX Series and SRX Series: When receiving a specific SIP packets stale call table
CVE-2022-22216 4.3 MEDIUM Junos OS: PTX Series and QFX10000 Series: 'Etherleak' memory disclosure in Ethernet paddin

IV. Related Vulnerabilities

Same product: Junos OS
Same vendor: Juniper Networks
Same weakness: CWE-755

V. Comments for CVE-2022-22202

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