title: Junos OS and Junos OS Evolved: In bidirectional LSP configurations, on MPLS egress router RPD may core upon receipt of specific malformed RSVP packet.
description: An improper input validation vulnerability in the Routing Protocol Daemon (RPD) service of Juniper Networks Junos OS allows an attacker to send a malformed RSVP packet when bidirectional LSPs are in use, which when received by an egress router crashes the RPD causing a Denial of Service (DoS) condition. Continued receipt of the packet will sustain the Denial of Service. This issue affects: Juniper Networks Junos OS: All versions prior to 17.3R3-S10 except 15.1X49-D240 for SRX series; 17.4 versions prior to 17.4R3-S2; 18.1 versions prior to 18.1R3-S10; 18.2 versions prior to 18.2R2-S7, 18.2R3-S4; 18.3 versions prior to 18.3R3-S2; 18.4 versions prior to 18.4R1-S8, 18.4R2-S6, 18.4R3-S2; 19.1 versions prior to 19.1R1-S5, 19.1R3-S3; 19.2 versions prior to 19.2R3; 19.3 versions prior to 19.3R2-S5, 19.3R3; 19.4 versions prior to 19.4R2-S2, 19.4R3-S1; 20.1 versions prior to 20.1R1-S4, 20.1R2; 15.1X49 versions prior to 15.1X49-D240 on SRX Series. Juniper Networks Junos OS Evolved: 19.3 versions prior to 19.3R2-S5-EVO; 19.4 versions prior to 19.4R2-S2-EVO; 20.1 versions prior to 20.1R1-S4-EVO.
problem types: CWE-20: Improper Input Validation
affected:
{
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 17.3R3-S10, status: affected, version: unspecified, versionType: custom
lessThan: 17.4R3-S2, status: affected, version: 17.4, versionType: custom
lessThan: 18.1R3-S10, status: affected, version: 18.1, versionType: custom
lessThan: 18.2R2-S7, 18.2R3-S4, status: affected, version: 18.2, versionType: custom
lessThan: 18.3R3-S2, status: affected, version: 18.3, versionType: custom
lessThan: 18.4R1-S8, 18.4R2-S6, 18.4R3-S2, status: affected, version: 18.4, versionType: custom
lessThan: 19.1R1-S5, 19.1R3-S3, status: affected, version: 19.1, versionType: custom
lessThan: 19.2R3, status: affected, version: 19.2, versionType: custom
lessThan: 19.3R2-S5, 19.3R3, status: affected, version: 19.3, versionType: custom
lessThan: 19.4R2-S2, 19.4R3-S1, status: affected, version: 19.4, versionType: custom
lessThan: 20.1R1-S4, 20.1R2, status: affected, version: 20.1, versionType: custom
}
{
platforms: SRX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 15.1X49-D240, status: affected, version: 15.1X49, versionType: custom
}
{
product: Junos OS Evolved
vendor: Juniper Networks
versions:
lessThan: 19.3R2-S5-EVO, status: affected, version: 19.3, versionType: custom
lessThan: 19.4R2-S2-EVO, status: affected, version: 19.4, versionType: custom
lessThan: 20.1R1-S4-EVO, status: affected, version: 20.1, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 8.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
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: 15.1X49-D240, 17.3R3-S10, 17.4R3-S2, 18.1R3-S10, 18.2R2-S7, 18.2R3-S4, 18.3R3-S2, 18.4R1-S8, 18.4R2-S6, 18.4R3-S2, 19.1R1-S5, 19.1R3-S3, 19.2R3, 19.3R2-S5, 19.3R3, 19.4R2-S2, 19.4R3-S1, 20.1R1-S4, 20.1R2, 20.2R1, and all subsequent releases.
Note: With the exception of SRX Series products using version 15.1X49-D240, all products using Junos OS prior to 17.3R3-S10 are affected and will not be fixed by Juniper Networks, Inc.
Junos OS Evolved: 19.3R2-S5-EVO, 19.4R2-S2-EVO, 20.1R1-S4-EVO, and all subsequent releases.
workarounds: If bidirectional LSPs are running in the network, when changing family mpls maximum-labels on an interface, first disable RSVP for this interface.
You can include the disable statement at the following hierarchy levels:
[edit protocols rsvp interface interface-name ]
[edit logical-systems logical-system-name protocols rsvp interface interface-name ]
See the MPLS RSVP disable configuration guide for further details.