CVE detail

CVE-2021-0281 — CVE-2021-0281

Published 2021-07-15 · Modified 2026-06-17 · Vendor juniper · Product junos · Source nvd
MEDIUM
severity
CVSS-derived band
5.9
CVSS v3
0–10 scale
0.0082
EPSS probability
exploitation probability, 30d
54.0%
EPSS percentile
percentile vs all CVEs
NOT LISTED
CISA KEV
known exploited catalog

Description

On Juniper Networks Junos OS devices configured with BGP origin validation using Resource Public Key Infrastructure (RPKI) receipt of a specific packet from the RPKI cache server may cause routing process daemon (RPD) to crash and restart, creating a Denial of Service (DoS) condition. Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R2-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S5; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R2-S

Remediation

vendor remediation guidance

The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R3-S5, 18.1R3-S13, 18.2R3-S8, 18.3R3-S5, 18.4R2-S8, 18.4R3-S8, 19.1R3-S5, 19.2R3-S2, 19.3R2-S6, 19.3R3-S2, 19.4R2-S4, 19.4R3-S3, 20.1R3, 20.2R3, 20.3R2, 20.4R2, 21.1R1 and all subsequent releases. Junos OS Evolved: 20.4R2-S2-EVO, 21.1R1-EVO, and all subsequent releases.

workarounds

There are no viable workarounds for this issue.

ProductVulnerable rangeFixed versionAdvisory
Juniper Networks Junos OS>=17.3<17.3R3-S1217.3R3-S12advisory ↗
Juniper Networks Junos OS>=17.4<17.4R3-S517.4R3-S5advisory ↗
Juniper Networks Junos OS>=18.1<18.1R3-S1318.1R3-S13advisory ↗
Juniper Networks Junos OS>=18.2<18.2R3-S818.2R3-S8advisory ↗
Juniper Networks Junos OS>=18.3<18.3R3-S518.3R3-S5advisory ↗
Juniper Networks Junos OS>=18.4<18.4R2-S8, 18.4R3-S818.4R2-S8, 18.4R3-S8advisory ↗
Juniper Networks Junos OS>=19.1<19.1R3-S519.1R3-S5advisory ↗
Juniper Networks Junos OS>=19.2<19.2R3-S219.2R3-S2advisory ↗
Juniper Networks Junos OS>=19.3<19.3R2-S6, 19.3R3-S219.3R2-S6, 19.3R3-S2advisory ↗
Juniper Networks Junos OS>=19.4<19.4R2-S4, 19.4R3-S319.4R2-S4, 19.4R3-S3advisory ↗
Juniper Networks Junos OS>=20.1<20.1R320.1R3advisory ↗
Juniper Networks Junos OS>=20.2<20.2R320.2R3advisory ↗
Juniper Networks Junos OS>=20.3<20.3R220.3R2advisory ↗
Juniper Networks Junos OS>=20.4<20.4R220.4R2advisory ↗
Juniper Networks Junos OS Evolved>=All<20.4R2-S2-EVO20.4R2-S2-EVOadvisory ↗

References

cvedb.io · NVD · CISA KEV · FIRST EPSS · vendor advisories (CVE Program List v5). Informational only, no warranty — verify every remediation against the vendor advisory before acting on it. This product uses data from the NVD API but is not endorsed or certified by the NVD, CISA, FIRST.org or any vendor named. CVE® is a registered trademark of The MITRE Corporation.