What is CVE-2021-31372?

CVE-2021-31372 is a high-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2021-10-19.

How severe is CVE-2021-31372?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Juniper Junos

CVE-2021-31372

An Improper Input Validation vulnerability in J-Web of Juniper Networks Junos OS allows a locally authenticated J-Web attacker to escalate their privileges to root over the target device. This issue affects: Juniper Networks Junos OS All versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S6; 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S3; 19.4 versions prior to 19.4R3-S5; 20.1 versions prior to 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2, 21.1R3; 21.2 versions prior to 21.2R1-S1, 21.2R2;

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.012 (66.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Juniper Junos — versions 18.3, 18.4, 19.1
Juniper Networks Junos Os — versions unspecified, 18.4, 19.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

sirt@juniper.net (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-31372?: CVE-2021-31372 is a high-severity vulnerability in Juniper Junos, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2021-10-19.
How severe is CVE-2021-31372?: High severity. CVSS v3 base score is 8.8 out of 10.