Log in Start free

Vulnerability · Published Oct 16, 2020 · Assigned by juniper

CVE-2020-1665Junos OS: MX series/EX9200 Series: IPv6 DDoS protection does not work as expected.

Medium 5.3

In plain English

A medium-severity security flaw in Junos OS from Juniper Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.3%top 29.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

On Juniper Networks MX Series and EX9200 Series, in a certain condition the IPv6 Distributed Denial of Service (DDoS) protection might not take affect when it reaches the threshold condition. The DDoS protection allows the device to continue to function while it is under DDoS attack, protecting both the Routing Engine (RE) and the Flexible PIC Concentrator (FPC) during the DDoS attack. When this issue occurs, the RE and/or the FPC can become overwhelmed, which could disrupt network protocol operations and/or interrupt traffic. This issue does not affect IPv4 DDoS protection. This issue affects MX Series and EX9200 Series with Trio-based PFEs (Packet Forwarding Engines). Please refer to https://kb.juniper.net/KB25385 for the list of Trio-based PFEs. This issue affects Juniper Networks Junos OS on MX series and EX9200 Series: 17.2 versions prior to 17.2R3-S4; 17.2X75 versions prior to 17.2X75-D102, 17.2X75-D110; 17.3 versions prior to 17.3R3-S8; 17.4 versions prior to 17.4R2-S11, 17.4R3-S2; 18.2 versions prior to 18.2R2-S7, 18.2R3, 18.2R3-S3; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R2-S4, 18.3R3-S2.

Affected products (as reported)

VendorProductVersions
Juniper Networks Junos OS 17.2 – before 17.2R3-S417.2X75 – before 17.2X75-D102, 17.2X75-D11017.3 – before 17.3R3-S817.4 – before 17.4R2-S11, 17.4R3-S218.2 – before 18.2R2-S7, 18.2R3, 18.2R3-S318.2X75 – before 18.2X75-D3018.3 – before 18.3R2-S4, 18.3R3-S2

Weakness: CWE-794 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References