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CVE PROGRAM SOURCE RECORD6.5 Medium

CVE-2021-31362

Junos OS and Junos OS Evolved: An IS-IS adjacency might be taken down if a bad hello PDU is received for an existing adjacency causing a DoS

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Status
Published
Published
Updated
Assigning organization
juniper

Description

A Protection Mechanism Failure vulnerability in RPD (routing protocol daemon) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause established IS-IS adjacencies to go down by sending a spoofed hello PDU leading to a Denial of Service (DoS) condition. Continued receipted of these spoofed PDUs will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All 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-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.

Affected products

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

Juniper Networks Junos OS

  • unspecified to < 18.2R3-S8affected
  • 18.3 to < 18.3R3-S5affected
  • 18.4 to < 18.4R3-S9affected
  • 19.1 to < 19.1R3-S7affected
  • 19.2 to < 19.2R1-S7, 19.2R3-S3affected
  • 19.3 to < 19.3R2-S6, 19.3R3-S2affected
  • 19.4 to < 19.4R3-S3affected
  • 20.1 to < 20.1R3affected
  • 20.2 to < 20.2R3affected
  • 20.3 to < 20.3R3affected
  • 20.4 to < 20.4R2affected

Juniper Networks Junos OS Evolved

  • unspecified to < 20.4R2-EVOaffected
  • 21.1 to < 21.1R2-EVOaffected

References