Junos OS: MX Series: In subscriber management / BBE configuration authd can crash if a subscriber with a specific username tries to login leading to a DoS

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 attacker 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 prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R3-S5; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 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 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2.

Timeline

1. Oct 19, 2021, 6:16 PM UTCCVE published
2. Sep 17, 2024, 4:25 AM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  From 15.1 · fixed in 15.1R7-S9; From 17.3 · fixed in 17.3R3-S12; From 17.4 · fixed in 17.4R3-S5; From 18.1 · fixed in 18.1R3-S13; From 18.2 · fixed in 18.2R3-S8; From 18.3 · fixed in 18.3R3-S5; From 18.4 · fixed in 18.4R3-S9; From 19.1 · fixed in 19.1R3-S6; From 19.4 · fixed in 19.4R3-S3; From 20.1 · fixed in 20.1R3; From 20.2 · fixed in 20.2R3-S1; From 20.3 · fixed in 20.3R3; From 20.4 · fixed in 20.4R3; From 21.1 · fixed in 21.1R2

References 1