Skip to content
CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2021-31366

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

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Juniper Networks Junos OS

  • 15.1 to < 15.1R7-S9affected
  • 17.3 to < 17.3R3-S12affected
  • 17.4 to < 17.4R3-S5affected
  • 18.1 to < 18.1R3-S13affected
  • 18.2 to < 18.2R3-S8affected
  • 18.3 to < 18.3R3-S5affected
  • 18.4 to < 18.4R3-S9affected
  • 19.1 to < 19.1R3-S6affected
  • 19.2 to < 19.2R1-S7, 19.2R3-S3affected
  • 19.3 to < 19.3R2-S6, 19.3R3-S3affected
  • 19.4 to < 19.4R3-S3affected
  • 20.1 to < 20.1R3affected
  • 20.2 to < 20.2R3-S1affected
  • 20.3 to < 20.3R3affected
  • 20.4 to < 20.4R3affected
  • 21.1 to < 21.1R2affected

References