Riskcovery

CVE-2025-52953

Junos OS and Junos OS Evolved: An unauthenticated adjacent attacker sending a valid BGP UPDATE packet forces a BGP session reset

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

Read the record on cve.org

Description

An Expected Behavior Violation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a valid BGP UPDATE packet to cause a BGP session reset, resulting in a Denial of Service (DoS).

Continuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

This issue affects iBGP and eBGP and both IPv4 and IPv6 are affected by this vulnerability.

This issue affects Junos OS:

* All versions before 21.2R3-S9, * from 21.4 before 21.4R3-S11, * from 22.2 before 22.2R3-S7, * from 22.4 before 22.4R3-S7, * from 23.2 before 23.2R2-S4, * from 23.4 before 23.4R2-S4, * from 24.2 before 24.2R2, * from 24.4 before 24.4R1-S3, 24.4R2

Junos OS Evolved:

* All versions before 22.2R3-S7-EVO, * from 22.4-EVO before 22.4R3-S7-EVO, * from 23.2-EVO before 23.2R2-S4-EVO, * from 23.4-EVO before 23.4R2-S4-EVO, * from 24.2-EVO before 24.2R2-EVO, * from 24.4-EVO before 24.4R1-S3-EVO, 24.4R2-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/AU:Y/R:A/V:C/RE:M/U:Amberjuniper
3.16.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-440 Expected Behavior Violation

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 21.2R3-S9Affected
  • 21.4 to before 21.4R3-S11Affected
  • 22.2 to before 22.2R3-S7Affected
  • 22.4 to before 22.4R3-S7Affected
  • 23.2 to before 23.2R2-S4Affected
  • 23.4 to before 23.4R2-S4Affected
  • 24.2 to before 24.2R2Affected
  • 24.4 to before 24.4R1-S3, 24.4R2Affected
Junos OS EvolvedJuniper Networks
  • before 22.2R3-S7-EVOAffected
  • 22.4-EVO to before 22.4R3-S7-EVOAffected
  • 23.2-EVO to before 23.2R2-S4-EVOAffected
  • 23.4-EVO to before 23.4R2-S4-EVOAffected
  • 24.2-EVO to before 24.2R2-EVOAffected
  • 24.4-EVO to before 24.4R1-S3-EVO, 24.4R2-EVOAffected

References

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