CVE-2021-31362

Summary

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 Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OSunspecified < 18.2R3-S8affected
Juniper NetworksJunos OS18.3 < 18.3R3-S5affected
Juniper NetworksJunos OS18.4 < 18.4R3-S9affected
Juniper NetworksJunos OS19.1 < 19.1R3-S7affected
Juniper NetworksJunos OS19.2 < 19.2R1-S7, 19.2R3-S3affected
Juniper NetworksJunos OS19.3 < 19.3R2-S6, 19.3R3-S2affected
Juniper NetworksJunos OS19.4 < 19.4R3-S3affected
Juniper NetworksJunos OS20.1 < 20.1R3affected
Juniper NetworksJunos OS20.2 < 20.2R3affected
Juniper NetworksJunos OS20.3 < 20.3R3affected
Juniper NetworksJunos OS20.4 < 20.4R2affected
Juniper NetworksJunos OS Evolvedunspecified < 20.4R2-EVOaffected
Juniper NetworksJunos OS Evolved21.1 < 21.1R2-EVOaffected

Weaknesses

  • CWE-693: CWE-693 Protection Mechanism Failure
  • Denial of Service (DoS)

Workarounds

There are no viable workarounds for this issue.

ADP Enrichment

CVE Program Container

Additional References

References