title: Junos OS and Junos OS Evolved: In a BGP rib sharding scenario when a route is frequently updated an rpd memory leak will occur
description: A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS). In a BGP rib sharding scenario, when an attribute of an active BGP route is updated memory will leak. As rpd memory usage increases over time the rpd process will eventually run out of memory, crash, and restart. The memory utilization can be monitored with the following CLI commands: show task memory show system processes extensive | match rpd This issue affects: Juniper Networks Junos OS 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R2. Juniper Networks Junos OS Evolved 20.3-EVO version 20.3R1-EVO and later versions; 20.4-EVO versions prior to 20.4R3-S6-EVO; 21.2-EVO versions prior to 21.2R3-EVO; 21.3-EVO versions prior to 21.3R2-EVO.
problem types: CWE-401 Missing Release of Memory after Effective Lifetime
affected:
{
vendor: Juniper Networks
product: Junos OS
versions:
version: 20.3, status: affected, lessThan: 20.3R3-S2, versionType: custom
version: 20.4, status: affected, lessThan: 20.4R3-S6, versionType: custom
version: 21.1, status: affected, lessThan: 21.1R3, versionType: custom
version: 21.2, status: affected, lessThan: 21.2R3, versionType: custom
version: 21.3, status: affected, lessThan: 21.3R2, versionType: custom
}
{
vendor: Juniper Networks
product: Junos OS Evolved
versions:
version: 20.3R1-EVO, status: affected, lessThan: 20.3-EVO*, versionType: custom
version: 20.4-EVO, status: affected, lessThan: 20.4R3-S6-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
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
]
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 Evolved: 20.4R3-S6-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and all subsequent releases.
Junos OS: 20.3R3-S2, 20.4R3-S6, 21.1R3, 21.2R3, 21.3R2, 21.4R1, and all subsequent releases.
workarounds: There are no known workarounds for this issue.