title: Junos OS and Junos OS Evolved: An rpd crash occurs when a specific L2VPN command is run
description: A Reachable Assertion vulnerability in Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a locally-based, low-privileged attacker to cause a Denial of Service (DoS).
On all Junos OS and Junos OS Evolved, when a specific L2VPN command is run, RPD will crash and restart. Continued execution of this specific command will create a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS
All versions prior to 19.3R3-S10;
20.1 versions prior to 20.1R3-S4;
20.2 versions prior to 20.2R3-S6;
20.3 versions prior to 20.3R3-S6;
20.4 versions prior to 20.4R3-S5;
21.1 versions prior to 21.1R3-S4;
21.2 versions prior to 21.2R3-S3;
21.3 versions prior to 21.3R3-S2;
21.4 versions prior to 21.4R3;
22.1 versions prior to 22.1R3;
22.2 versions prior to 22.2R2;
22.3 versions prior to 22.3R2;
Juniper Networks Junos OS Evolved
All versions prior to 20.4R3-S7-EVO;
21.1 versions prior to 21.1R3-S3-EVO;
21.2 versions prior to 21.2R3-S5-EVO;
21.3 versions prior to 21.3R3-S4-EVO;
21.4 versions prior to 21.4R3-EVO;
22.1 versions prior to 22.1R3-EVO;
22.2 versions prior to 22.2R2-EVO;
22.3 versions prior to 22.3R2-EVO;
problem types: CWE-617 Reachable Assertion
affected:
{
defaultStatus: unaffected
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 19.3R3-S10, status: affected, version: unspecified, versionType: custom
lessThan: 20.1R3-S4, status: affected, version: 20.1, versionType: custom
lessThan: 20.2R3-S6, status: affected, version: 20.2, versionType: custom
lessThan: 20.3R3-S6, status: affected, version: 20.3, versionType: custom
lessThan: 20.4R3-S5, status: affected, version: 20.4, versionType: custom
lessThan: 21.1R3-S4, status: affected, version: 21.1, versionType: custom
lessThan: 21.2R3-S3, status: affected, version: 21.2, versionType: custom
lessThan: 21.3R3-S2, status: affected, version: 21.3, versionType: custom
lessThan: 21.4R3, status: affected, version: 21.4, versionType: custom
lessThan: 22.1R3, status: affected, version: 22.1, versionType: custom
lessThan: 22.2R2, status: affected, version: 22.2, versionType: custom
lessThan: 22.3R2, status: affected, version: 22.3, versionType: custom
}
{
defaultStatus: unaffected
product: Junos OS Evolved
vendor: Juniper Networks
versions:
lessThan: 20.4R3-S7-EVO, status: affected, version: unspecified, versionType: custom
lessThan: 21.1R3-S3-EVO, status: affected, version: 21.1, versionType: custom
lessThan: 21.2R3-S5-EVO, status: affected, version: 21.2, versionType: custom
lessThan: 21.3R3-S4-EVO, status: affected, version: 21.3, versionType: custom
lessThan: 21.4R3-EVO, status: affected, version: 21.4, versionType: custom
lessThan: 22.1R3-EVO, status: affected, version: 22.1, versionType: custom
lessThan: 22.2R2-EVO, status: affected, version: 22.2, versionType: custom
lessThan: 22.3R2-EVO, status: affected, version: 22.3, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: LOCAL
availabilityImpact: HIGH
baseScore: 5.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
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: 19.3R3-S7, 19.4R3-S10, 20.2R3-S6, 20.4R3-S5, 21.1R3-S4, 21.2R3-S3, 21.3R3-S2, 21.4R3, 22.1R3, 22.2R2, 22.3R2, 22.4R1, and all subsequent releases;
Junos OS Evolved: 20.4R3-S7-EVO, 21.4R3-EVO, 22.1R3-EVO, 22.2R2-EVO, 22.3R2-EVO, 22.4R1-EVO, and all subsequent releases.
workarounds: This issue can be avoided by using access lists or firewall filters to limit access to the device to only trusted hosts, networks and administrators.