Riskcovery

CVE-2025-52955

Junos OS and Junos OS Evolved: When jflow/sflow is configured continuous logical interface flaps causes rpd crash and restart

State
Published
Severity
7.1 High
Published
Jul 11, 2025
Updated
Aug 20, 2025
Reserved
Jun 23, 2025

Read the record on cve.org

Description

An Incorrect Calculation of Buffer Size vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a memory corruption that leads to a rpd crash.

When the logical interface using a routing instance flaps continuously, specific updates are sent to the jflow/sflow modules. This results in memory corruption, leading to an rpd crash and restart.

Continued receipt of these specific updates will cause a sustained Denial of Service condition.

This issue affects Junos OS:

* All versions before 21.2R3-S9, * All versions of 21.4, * All versions of 22.2, * from 22.4 before 22.4R3-S7, * from 23.2 before 23.2R2-S3, * from 23.4 before 23.4R2-S4, * from 24.2 before 24.2R2.

Junos OS Evolved:

* All versions of 21.2-EVO,  * All versions of 21.4-EVO,  * All versions of 22.2-EVO,  * from 22.4 before 22.4R3-S7-EVO,  * from 23.2 before 23.2R2-S3-EVO,  * from 23.4 before 23.4R2-S4-EVO,  * from 24.2 before 24.2R2-EVO.

Scores

CVSSScoreVectorSource
4.07.1 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/U:Greenjuniper
3.16.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-131 Incorrect Calculation of Buffer Size

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 21.2R3-S9Affected
  • 21.4 to before 21.4*Affected
  • 22.2 to before 22.2*Affected
  • 22.4 to before 22.4R3-S7Affected
  • 23.2 to before 23.2R2-S3Affected
  • 23.4 to before 23.4R2-S4Affected
  • 24.2 to before 24.2R2Affected
Junos OS EvolvedJuniper Networks
  • before 21.2*-EVOAffected
  • 21.4 to before 21.4*-EVOAffected
  • 22.2 to before 22.2*-EVOAffected
  • 22.4 to before 22.4R3-S7-EVOAffected
  • 23.2 to before 23.2R2-S3-EVOAffected
  • 23.4 to before 23.4R2-S4-EVOAffected
  • 24.2 to before 24.2R2-EVOAffected

References

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