6.5

CVE-2021-0287: juniper networks junos os

CVSS: 6.5v3.1MediumModified
Published 15-07-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-0287 is a medium (CVSS 6.5) vulnerability in juniper networks junos os. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.8% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.37%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-07-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

In a Segment Routing ISIS (SR-ISIS)/MPLS environment, on Juniper Networks Junos OS and Junos OS Evolved devices, configured with ISIS Flexible Algorithm for Segment Routing and sensor-based statistics, a flap of a ISIS link in the network, can lead to a routing process daemon (RPD) crash and restart, causing a Denial of Service (DoS). Continued link flaps will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 19.4 versions prior to 19.4R1-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2-S2, 20.2R3; 20.3 versions prior to 20.3R2; Juniper Networks Junos OS Evolved: 20.3-EVO versions prior to 20.3R2-EVO; 20.4-EVO versions prior to 20.4R2-EVO. This issue does not affect: Juniper Networks Junos OS releases prior to 19.4R1. Juniper Networks Junos OS Evolved releases prior to 19.4R1-EVO.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

0.00 pp

From 0.37% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.37%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Juniper2 products
  • junos19.4:r1 | 19.4:r1-s1 | 19.4:r1-s2 | 19.4:r1-s3 | 19.4:r2 | 19.4:r2-s1 | 19.4:r2-s2 | 19.4:r2-s3 | 19.4:r3 | 19.4:r3-s1 | 20.1:r1 | 20.1:r1-s1 | 20.1:r1-s2 | 20.1:r1-s3 | 20.1:r1-s4 | 20.1:r2 | 20.2:r1 | 20.2:r1-s1 | 20.2:r1-s2 | 20.2:r1-s3 | 20.2:r2 | 20.2:r2-s1 | 20.3:r1 | 20.3:r1-s1
  • junos_os_evolved20.3 | 20.3:r1 | 20.4:r1-s1
Juniper networks2 products
  • junos os≥ 19.4R1, < 19.4* | ≥ 20.1, < 20.1R2-S1, 20.1R3 | ≥ 20.2, < 20.2R2-S2, 20.2R3 | ≥ 20.3, < 20.3R2
  • junos os evolved≥ 19.4R1-EVO, < 19.4* | ≥ 20.1R1-EVO, < 20.1* | ≥ 20.2R1-EVO, < 20.2* | ≥ 20.3, < 20.3R2-EVO | ≥ 20.4, < 20.4R2-EVO

2 vendors · 4 products

References

1 links