PT-2021-19275 · Juniper Networks · Junos

Published 2021-10-19 · Updated 2021-10-25 · CVE-2021-31378

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions prior to 17.3R3-S12 Juniper Networks Junos OS versions prior to 17.4R3-S5 Juniper Networks Junos OS versions prior to 18.1R3-S13 Juniper Networks Junos OS versions prior to 18.2R3-S8 Juniper Networks Junos OS versions prior to 18.3R3-S5 Juniper Networks Junos OS versions prior to 18.4R2-S8 Juniper Networks Junos OS versions prior to 18.4R3-S9 Juniper Networks Junos OS versions prior to 19.1R3-S6 Juniper Networks Junos OS versions prior to 19.2R1-S7 Juniper Networks Junos OS versions prior to 19.2R3-S3 Juniper Networks Junos OS versions prior to 19.3R2-S6 Juniper Networks Junos OS versions prior to 19.3R3-S3 Juniper Networks Junos OS versions prior to 19.4R1-S4 Juniper Networks Junos OS versions prior to 19.4R3-S3 Juniper Networks Junos OS versions prior to 20.1R3 Juniper Networks Junos OS versions prior to 20.2R3-S1 Juniper Networks Junos OS versions prior to 20.3R3 Juniper Networks Junos OS versions prior to 20.4R3 Juniper Networks Junos OS versions prior to 21.1R2

Description In broadband environments, an attacker can send spoofed messages appearing to originate from trusted RADIUS servers to force a subscriber into a "Terminating" state, causing a Denial of Service (DoS) to the endpoint device. The Junos OS General Authentication Service (authd) daemon is affected by these spoofed messages. Once in the "Terminating" state, the endpoint subscriber will no longer be able to access the network. An indicator of compromise may be seen by displaying the output of "show subscribers summary", which may show subscribers in the "Terminating" state.

Recommendations For Juniper Networks Junos OS versions prior to 17.3R3-S12, update to version 17.3R3-S12 or later. For Juniper Networks Junos OS versions prior to 17.4R3-S5, update to version 17.4R3-S5 or later. For Juniper Networks Junos OS versions prior to 18.1R3-S13, update to version 18.1R3-S13 or later. For Juniper Networks Junos OS versions prior to 18.2R3-S8, update to version 18.2R3-S8 or later. For Juniper Networks Junos OS versions prior to 18.3R3-S5, update to version 18.3R3-S5 or later. For Juniper Networks Junos OS versions prior to 18.4R2-S8, update to version 18.4R2-S8 or later. For Juniper Networks Junos OS versions prior to 18.4R3-S9, update to version 18.4R3-S9 or later. For Juniper Networks Junos OS versions prior to 19.1R3-S6, update to version 19.1R3-S6 or later. For Juniper Networks Junos OS versions prior to 19.2R1-S7, update to version 19.2R1-S7 or later. For Juniper Networks Junos OS versions prior to 19.2R3-S3, update to version 19.2R3-S3 or later. For Juniper Networks Junos OS versions prior to 19.3R2-S6, update to version 19.3R2-S6 or later. For Juniper Networks Junos OS versions prior to 19.3R3-S3, update to version 19.3R3-S3 or later. For Juniper Networks Junos OS versions prior to 19.4R1-S4, update to version 19.4R1-S4 or later. For Juniper Networks Junos OS versions prior to 19.4R3-S3, update to version 19.4R3-S3 or later. For Juniper Networks Junos OS versions prior to 20.1R3, update to version 20.1R3 or later. For Juniper Networks Junos OS versions prior to 20.2R3-S1, update to version 20.2R3-S1 or later. For Juniper Networks Junos OS versions prior to 20.3R3, update to version 20.3R3 or later. For Juniper Networks Junos OS versions prior to 20.4R3, update to version 20.4R3 or later. For Juniper Networks Junos OS versions prior to 21.1R2, update to version 21.1R2 or later. As a temporary workaround, consider restarting the authd daemon on the Junos OS device to clear the subscribers out of the "Terminating" state.

Fix

DoS

Missing Release of Resource after Effective Lifetime

Weakness Enumeration

CWE-772

Related Identifiers

CVE-2021-31378

Affected Products

Junos

References · 4

• https://juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/topic-map/general-authentication-service-events-tracing.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-31378 · Vendor Advisory
• https://kb.juniper.net/JSA11246 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31378 · Security Note