Riskcovery

CVE-2021-0287

Junos OS and Junos OS Evolved: RPD could crash in SR-ISIS/MPLS environment due to a flap of an ISIS link in the network

State
Published
Severity
6.5 Medium
Published
Jul 15, 2021
Updated
Sep 16, 2024
Reserved
Oct 27, 2020

Read the record on cve.org

Description

In a Segment Routing ISIS (SR-ISIS)/MPLS environment, on Juniper Networks Junos OS and Junos OS Evolved devices, configured with ISIS Flexible Algorithm for Segment Routing and sensor-based statistics, a flap of a ISIS link in the network, can lead to a routing process daemon (RPD) crash and restart, causing a Denial of Service (DoS). Continued link flaps will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 19.4 versions prior to 19.4R1-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R2-S2, 20.2R3; 20.3 versions prior to 20.3R2; Juniper Networks Junos OS Evolved: 20.3-EVO versions prior to 20.3R2-EVO; 20.4-EVO versions prior to 20.4R2-EVO. This issue does not affect: Juniper Networks Junos OS releases prior to 19.4R1. Juniper Networks Junos OS Evolved releases prior to 19.4R1-EVO.

Scores

CVSSScoreVectorSource
3.16.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 19.4R1Not affected
  • 19.4R1 to before 19.4*Affectedfrom 19.4R1-S4, 19.4R3-S2Not affected
  • 20.1 to before 20.1R2-S1, 20.1R3Affected
  • 20.2 to before 20.2R2-S2, 20.2R3Affected
  • 20.3 to before 20.3R2Affected
Junos OS EvolvedJuniper Networks
  • before 19.4R1-EVONot affected
  • 19.4R1-EVO to before 19.4*Affected
  • 20.1R1-EVO to before 20.1*Affected
  • 20.2R1-EVO to before 20.2*Affected
  • 20.3 to before 20.3R2-EVOAffected
  • 20.4 to before 20.4R2-EVOAffected

References

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