Riskcovery

CVE-2025-52949

Junos OS and Junos OS Evolved: In an EVPN environment, receipt of specifically malformed BGP update causes RPD crash

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 Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

Only systems configured for Ethernet Virtual Private Networking (EVPN) signaling are vulnerable to this issue.

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

Junos OS:

* all versions before 21.4R3-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-S5,  * from 24.2 before 24.2R2-S1,  * 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-S5-EVO,  * from 24.2-EVO before 24.2R2-S1-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-130 Improper Handling of Length Parameter Inconsistency

Affected Products

ProductVersions
Junos OSJuniper Networks
  • 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-S5Affected
  • 24.2 to before 24.2R2-S1Affected
  • 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-S5-EVOAffected
  • 24.2-EVO to before 24.2R2-S1-EVOAffected
  • 24.4-EVO to before 24.4R1-S3-EVO, 24.4R2-EVOAffected

References

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