title: Junos OS and Junos OS Evolved: An FPC crash might be seen due to an EVPN MAC entry moving from local to remote
description: An Improper Control of a Resource Through its Lifetime vulnerability in Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows unauthenticated adjacent attacker to cause a Denial of Service (DoS). In an EVPN-MPLS scenario, if MAC is learned locally on an access interface but later a request to delete is received indicating that the MAC was learnt remotely, this can lead to memory corruption which can result in line card crash and reload. This issue affects: Juniper Networks Junos OS All versions 17.3R1 and later versions prior to 19.2R3-S5; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S8; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S3; 21.1 versions prior to 21.1R3-S1; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R2; 21.4 versions prior to 21.4R1-S1, 21.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S3-EVO; 21.1-EVO version 21.1R1-EVO and later versions; 21.2-EVO versions prior to 21.2R3-EVO; 21.3-EVO versions prior to 21.3R2-EVO; 21.4-EVO versions prior to 21.4R1-S1-EVO, 21.4R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 17.3R1.
problem types: Denial of Service (DoS)
affected:
{
vendor: Juniper Networks
product: Junos OS
versions:
version: 17.3R1, status: affected, lessThan: unspecified, versionType: custom
version: unspecified, lessThan: 17.3R1, status: unaffected, versionType: custom
version: 19.2, status: affected, lessThan: 19.2R3-S5, versionType: custom
version: 19.3, status: affected, lessThan: 19.3R3-S5, versionType: custom
version: 19.4, status: affected, lessThan: 19.4R2-S6, 19.4R3-S8, versionType: custom
version: 20.1R1, status: affected, lessThan: 20.1*, versionType: custom
version: 20.2, status: affected, lessThan: 20.2R3-S4, versionType: custom
version: 20.3, status: affected, lessThan: 20.3R3-S3, versionType: custom
version: 20.4, status: affected, lessThan: 20.4R3-S3, versionType: custom
version: 21.1, status: affected, lessThan: 21.1R3-S1, versionType: custom
version: 21.2, status: affected, lessThan: 21.2R3, versionType: custom
version: 21.3, status: affected, lessThan: 21.3R2, versionType: custom
version: 21.4, status: affected, lessThan: 21.4R1-S1, 21.4R2, versionType: custom
}
{
vendor: Juniper Networks
product: Junos OS Evolved
versions:
version: unspecified, lessThan: 20.4R3-S3-EVO, status: affected, versionType: custom
version: 21.1R1-EVO, status: affected, lessThan: 21.1-EVO*, versionType: custom
version: 21.2-EVO, status: affected, lessThan: 21.2R3-EVO, versionType: custom
version: 21.3-EVO, status: affected, lessThan: 21.3R2-EVO, versionType: custom
version: 21.4-EVO, status: affected, lessThan: 21.4R1-S1-EVO, 21.4R2-EVO, versionType: custom
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: ADJACENT_NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
baseScore: 6.5
baseSeverity: MEDIUM
]
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue:
Junos OS: 19.2R3-S5, 19.3R3-S5, 19.4R2-S6, 19.4R3-S8, 20.2R3-S4, 20.3R3-S3, 20.4R3-S3, 21.1R3-S1, 21.2R3, 21.3R2, 21.4R1-S1, 21.4R2, 22.1R1, and all subsequent releases;
Junos OS Evolved: 20.4R3-S3-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-S1-EVO, 21.4R2-EVO, 22.1R1-EVO, and all subsequent releases
workarounds: There are no viable workarounds for this issue.