01 Record

CVE-2021-0208

Junos OS and Junos OS Evolved: In bidirectional LSP configurations, on MPLS egress router RPD may core upon receipt of specific malformed RSVP packet.

HighPUBLISHEDCNA: juniper

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

Junos OS and Junos OS Evolved: In bidirectional LSP configurations, on MPLS egress router RPD may core upon receipt of specific malformed RSVP packet.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.65% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 51.1% of scored records. A rank, not a probability.
NVD base score: 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-01-15 17:35Z5 YR AGO

Last updated

2024-09-16 18:24Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

juniper

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

a36f45c88c757d1ca730aa8e9dcd135ef808890c87ed0c970c56dff6a8840144

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS< 17.3R3-S10, 17.4 to < 17.4R3-S2, 18.1 to < 18.1R3-S10, 18.2 to < 18.2R2-S7, 18.2R3-S4, 18.3 to < 18.3R3-S2, 18.4 to < 18.4R1-S8, 18.4R2-S6, 18.4R3-S2, 19.1 to < 19.1R1-S5, 19.1R3-S3, 19.2 to < 19.2R3, 19.3 to < 19.3R2-S5, 19.3R3, 19.4 to < 19.4R2-S2, 19.4R3-S1, 20.1 to < 20.1R1-S4, 20.1R2, 15.1X49 to < 15.1X49-D240SRX Series

Juniper NetworksJunos OS Evolved19.3 to < 19.3R2-S5-EVO, 19.4 to < 19.4R2-S2-EVO, 20.1 to < 20.1R1-S4-EVO—

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11098x_refsource_CONFIRM
www.juniper.nethttps://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/disable-edit-protocols-rsvp.htmlx_refsource_MISC
www.juniper.nethttps://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/corouted-bidirectional-edit-protocols-mpls.htmlx_refsource_MISC

07 Remediation

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.