Riskcovery

CVE-2021-31367

Junos OS: PTX Series: An FPC heap memory leak will be triggered by certain Flowspec route operations which can lead to an FPC crash

State
Published
Severity
6.5 Medium
Published
Oct 19, 2021
Updated
Sep 16, 2024
Reserved
Apr 15, 2021

Read the record on cve.org

Description

A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows an adjacent attacker to cause a Denial of Service (DoS) by sending genuine BGP flowspec packets which cause an FPC heap memory leak. Once having run out of memory the FPC will crash and restart along with a core dump. Continued receipted of these packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All 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-S3; 19.4 versions prior to 19.4R1-S4, 19.4R3-S6; 20.1 versions prior to 20.1R2-S2, 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. Juniper Networks Junos Evolved is not affected.

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-401 Improper Release of Memory Before Removing Last Reference

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 18.4R3-S9Affected
  • 19.1 to before 19.1R3-S7Affected
  • 19.2 to before 19.2R1-S7, 19.2R3-S3Affected
  • 19.3 to before 19.3R2-S6, 19.3R3-S3Affected
  • 19.4 to before 19.4R1-S4, 19.4R3-S6Affected
  • 20.1 to before 20.1R2-S2, 20.1R3Affected
  • 20.2 to before 20.2R3-S1Affected
  • 20.3 to before 20.3R3Affected
  • 20.4 to before 20.4R3Affected
  • 21.1 to before 21.1R2Affected

References

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