What is CVE-2021-31384?

CVE-2021-31384 is a high-severity vulnerability in Juniper Junos, classified under Improper Authorization. CVSS score: 7.2/10. Published 2021-10-19.

How severe is CVE-2021-31384?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2021-31384 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Juniper Junos

CVE-2021-31384

Due to a Missing Authorization weakness and Insufficient Granularity of Access Control in a specific device configuration, a vulnerability exists in Juniper Networks Junos OS on SRX Series whereby an attacker who attempts to access J-Web administrative interfaces can successfully do so from any device interface regardless of the web-management configuration and filter rules which may otherwise protect access to J-Web. This issue affects: Juniper Networks Junos OS SRX Series 20.4 version 20.4R1 and later versions prior to 20.4R2-S1, 20.4R3; 21.1 versions prior to 21.1R1-S1, 21.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.4R1.

EPSS: 0.012 (65.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

sirt@juniper.net (Permissions Required, x_refsource_MISC)
nvd@nist.gov (Vendor Advisory)

Frequently asked questions

What is CVE-2021-31384?: CVE-2021-31384 is a high-severity vulnerability in Juniper Junos, classified under Improper Authorization. CVSS score: 7.2/10. Published 2021-10-19.
How severe is CVE-2021-31384?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2021-31384 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.