CVE detail

CVE-2021-0297 — CVE-2021-0297

Published 2021-10-19 · Modified 2026-06-17 · Vendor juniper · Product junos_os_evolved · Source nvd

MEDIUM

severity

CVSS-derived band

6.5

CVSS v3

0–10 scale

0.0073

EPSS probability

exploitation probability, 30d

51.0%

EPSS percentile

percentile vs all CVEs

NOT LISTED

CISA KEV

known exploited catalog

Description

A vulnerability in the processing of TCP MD5 authentication in Juniper Networks Junos OS Evolved may allow a BGP or LDP session configured with MD5 authentication to succeed, even if the peer does not have TCP MD5 authentication enabled. This could lead to untrusted or unauthorized sessions being established, resulting in an impact on confidentiality or stability of the network. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.3R2-S1-EVO; 20.4 versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO. Juniper Networks Junos OS is not affected by this issue.

Remediation

vendor remediation guidance

The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.3R2-S1-EVO, 20.4R2-EVO, 21.1R2-EVO, 21.2R1-EVO, and all subsequent releases.

workarounds

There are no known workarounds for this issue.

Product	Vulnerable range	Fixed version	Advisory
Juniper Networks Junos OS Evolved	>=unspecified<20.3R2-S1-EVO	20.3R2-S1-EVO	advisory ↗
Juniper Networks Junos OS Evolved	>=20.4<20.4R2-EVO	20.4R2-EVO	advisory ↗
Juniper Networks Junos OS Evolved	>=21.1<21.1R2-EVO	21.1R2-EVO	advisory ↗

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.