6.5
CVSSv3

CVE-2021-31366

Published: 19/10/2021 Updated: 25/10/2021
CVSS v2 Base Score: 3.3 | Impact Score: 2.9 | Exploitability Score: 6.5
CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8
VMScore: 294
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Summary

An Unchecked Return Value vulnerability in the authd (authentication daemon) of Juniper Networks Junos OS on MX Series configured for subscriber management / BBE allows an adjacent malicious user to cause a crash by sending a specific username. This impacts authentication, authorization, and accounting (AAA) services on the MX devices and leads to a Denial of Service (DoS) condition. Continued receipted of these PPP login request will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS 15.1 versions before 15.1R7-S9; 17.3 versions before 17.3R3-S12; 17.4 versions before 17.4R3-S5; 18.1 versions before 18.1R3-S13; 18.2 versions before 18.2R3-S8; 18.3 versions before 18.3R3-S5; 18.4 versions before 18.4R3-S9; 19.1 versions before 19.1R3-S6; 19.2 versions before 19.2R1-S7, 19.2R3-S3; 19.3 versions before 19.3R2-S6, 19.3R3-S3; 19.4 versions before 19.4R3-S3; 20.1 versions before 20.1R3; 20.2 versions before 20.2R3-S1; 20.3 versions before 20.3R3; 20.4 versions before 20.4R3; 21.1 versions before 21.1R2.

Vulnerability Trend

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juniper junos 15.1

juniper junos 17.3

juniper junos 17.4

juniper junos 18.1

juniper junos 18.2

juniper junos 18.3

juniper junos 18.4

juniper junos 19.1

juniper junos 19.2

juniper junos 19.3

juniper junos 19.4

juniper junos 20.1

juniper junos 20.2

juniper junos 20.3

juniper junos 20.4

juniper junos 21.1