What is CVE-2021-31351?

CVE-2021-31351 is a high-severity vulnerability in Juniper Junos, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2021-10-19.

How severe is CVE-2021-31351?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Juniper Junos

CVE-2021-31351

An Improper Check for Unusual or Exceptional Conditions in packet processing on the MS-MPC/MS-MIC utilized by Juniper Networks Junos OS allows a malicious attacker to send a specific packet, triggering the MS-MPC/MS-MIC to reset, causing a…

EPSS: 0.010 (57.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Juniper Junos — versions 17.3, 17.4, 18.1
Juniper Mx10
Juniper Mx10000
Juniper Mx10003
Juniper Mx10008
Juniper Mx10016
Juniper Mx104
Juniper Mx150
Juniper Mx2008
Juniper Mx2010

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

sirt@juniper.net (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-31351?: CVE-2021-31351 is a high-severity vulnerability in Juniper Junos, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2021-10-19.
How severe is CVE-2021-31351?: High severity. CVSS v3 base score is 7.5 out of 10.