CVE-2021-0259
Assigner: juniper
Published: 2021-04-14T00:00:00
State: PUBLISHED
affected: platforms: QFX5K Series
product: Junos OS
vendor: Juniper Networks
versions: lessThan: 17.3R3-S11
status: affected
version: 17.3
versionType: custom
lessThan: 17.4R3-S5
status: affected
version: 17.4
versionType: custom
lessThan: 18.1R3-S13
status: affected
version: 18.1
versionType: custom
lessThan: 18.2R2-S8, 18.2R3-S8
status: affected
version: 18.2
versionType: custom
lessThan: 18.3R3-S5
status: affected
version: 18.3
versionType: custom
lessThan: 18.4R1-S8, 18.4R2-S6, 18.4R3-S6
status: affected
version: 18.4
versionType: custom
lessThan: 19.1R3-S4
status: affected
version: 19.1
versionType: custom
lessThan: 19.2R1-S6, 19.2R3-S2
status: affected
version: 19.2
versionType: custom
lessThan: 19.3R3-S2
status: affected
version: 19.3
versionType: custom
lessThan: 19.4R2-S4, 19.4R3-S1
status: affected
version: 19.4
versionType: custom
lessThan: 20.1R2
status: affected
version: 20.1
versionType: custom
lessThan: 20.2R2
status: affected
version: 20.2
versionType: custom
lessThan: 20.3R1-S2, 20.3R2
status: affected
version: 20.3
versionType: custom
platforms: QFX5220
product: Junos OS Evolved
vendor: Juniper Networks
versions: lessThan: 20.3R2-EVO
status: affected
version: unspecified
versionType: custom
configurations: value: An example of a configuration affected by this issue is shown below:

  routing-instance evpn10 {
     vtep-source-interface lo0.0;
     instance-type evpn;
     vlan-id 10;
     interface xe-0/0/2.10;
     vxlan {
        vni 10;
     }
     route-distinguisher 10.255.181.13:10;
     vrf-target target:10:10;
     protocols {
        evpn;
     }
  }

datePublic: 2021-04-14T00:00:00
descriptions: value: Due to a vulnerability in DDoS protection in Juniper Networks Junos OS and Junos OS Evolved on QFX5K Series switches in a VXLAN configuration, instability might be experienced in the underlay network as a consequence of exceeding the default ddos-protection aggregate threshold. If an attacker on a client device on the overlay network sends a high volume of specific, legitimate traffic in the overlay network, due to an improperly detected DDoS violation, the leaf might not process certain L2 traffic, sent by spines in the underlay network. Continued receipt and processing of the high volume traffic will sustain the Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS on QFX5K Series: 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R2-S8, 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6, 19.2R3-S2; 19.3 versions prior to 19.3R3-S2; 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; 20.3 versions prior to 20.3R1-S2, 20.3R2. Juniper Networks Junos OS Evolved on QFX5220: All versions prior to 20.3R2-EVO.
exploits: value: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
metrics: cvssV3_1: attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 7.4
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.1
problemTypes: descriptions: cweId: CWE-755
description: CWE-755 Improper Handling of Exceptional Conditions
type: CWE
descriptions: description: Denial of Service (DoS)
type: text
solutions: value: The following software releases have been updated to resolve this specific issue:

Junos OS: 17.3R3-S11, 17.4R3-S5, 18.1R3-S13, 18.2R2-S8, 18.2R3-S8, 18.3R3-S5, 18.4R1-S8, 18.4R2-S6, 18.4R3-S6, 19.1R3-S4, 19.2R1-S6, 19.2R3-S2, 19.3R3-S2, 19.4R2-S4, 19.4R3-S1, 20.1R2, 20.2R2, 20.3R1-S2, 20.3R2, 20.4R1, and all subsequent releases.

Junos OS Evolved: 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.

source: advisory: JSA11150
defect: 1499681
discovery: USER
title: Junos OS and Junos OS Evolved: QFX5K Series: Underlay network traffic might not be processed upon receipt of high rate of specific genuine overlay packets in VXLAN scenario
workarounds: value: There are no available workarounds for this issue.
x_generator: engine: Vulnogram 0.0.9