CVE-2025-52953

EUVD-2025-21156

11.07.2025, 15:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.5 MEDIUM	ADJACENT_NETWORK	LOW	NONE	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
juniper	CNA	6.5 MEDIUM	ADJACENT_NETWORK	LOW	NONE	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 13%

Affected Products (NVD)

Vendor	Product	Version
juniper	junos	𝑥 < 21.2
juniper	junos	21.2
juniper	junos	21.2:r1
juniper	junos	21.2:r1-s1
juniper	junos	21.2:r1-s2
juniper	junos	21.2:r2
juniper	junos	21.2:r2-s1
juniper	junos	21.2:r2-s2
juniper	junos	21.2:r3
juniper	junos	21.2:r3-s1
juniper	junos	21.2:r3-s2
juniper	junos	21.2:r3-s3
juniper	junos	21.2:r3-s4
juniper	junos	21.2:r3-s5
juniper	junos	21.2:r3-s6
juniper	junos	21.2:r3-s7
juniper	junos	21.2:r3-s8
juniper	junos	21.4
juniper	junos	21.4:r1
juniper	junos	21.4:r1-s1
juniper	junos	21.4:r1-s2
juniper	junos	21.4:r2
juniper	junos	21.4:r2-s1
juniper	junos	21.4:r2-s2
juniper	junos	21.4:r3
juniper	junos	21.4:r3-s1
juniper	junos	21.4:r3-s10
juniper	junos	21.4:r3-s2
juniper	junos	21.4:r3-s3
juniper	junos	21.4:r3-s4
juniper	junos	21.4:r3-s5
juniper	junos	21.4:r3-s6
juniper	junos	21.4:r3-s7
juniper	junos	21.4:r3-s8
juniper	junos	21.4:r3-s9
juniper	junos	22.2
juniper	junos	22.2:r1
juniper	junos	22.2:r1-s1
juniper	junos	22.2:r1-s2
juniper	junos	22.2:r2
juniper	junos	22.2:r2-s1
juniper	junos	22.2:r2-s2
juniper	junos	22.2:r3
juniper	junos	22.2:r3-s1
juniper	junos	22.2:r3-s2
juniper	junos	22.2:r3-s3
juniper	junos	22.2:r3-s4
juniper	junos	22.2:r3-s5
juniper	junos	22.2:r3-s6
juniper	junos	22.4
juniper	junos	22.4:r1
juniper	junos	22.4:r1-s1
juniper	junos	22.4:r1-s2
juniper	junos	22.4:r2
juniper	junos	22.4:r2-s1
juniper	junos	22.4:r2-s2
juniper	junos	22.4:r3
juniper	junos	22.4:r3-s1
juniper	junos	22.4:r3-s2
juniper	junos	22.4:r3-s3
juniper	junos	22.4:r3-s4
juniper	junos	22.4:r3-s5
juniper	junos	22.4:r3-s6
juniper	junos	23.2
juniper	junos	23.2:r1
juniper	junos	23.2:r1-s1
juniper	junos	23.2:r1-s2
juniper	junos	23.2:r2
juniper	junos	23.2:r2-s1
juniper	junos	23.2:r2-s2
juniper	junos	23.2:r2-s3
juniper	junos	23.4
juniper	junos	23.4:r1
juniper	junos	23.4:r1-s1
juniper	junos	23.4:r1-s2
juniper	junos	23.4:r2
juniper	junos	23.4:r2-s1
juniper	junos	23.4:r2-s2
juniper	junos	23.4:r2-s3
juniper	junos	24.2
juniper	junos	24.2:r1
juniper	junos	24.2:r1-s1
juniper	junos	24.2:r1-s2
juniper	junos	24.4
juniper	junos	24.4:r1
juniper	junos	24.4:r1-s2
juniper	junos	24.4:r2
juniper	junos_os_evolved	𝑥 < 22.2
juniper	junos_os_evolved	22.2
juniper	junos_os_evolved	22.2:r1
juniper	junos_os_evolved	22.2:r1-s1
juniper	junos_os_evolved	22.2:r1-s2
juniper	junos_os_evolved	22.2:r2
juniper	junos_os_evolved	22.2:r2-s1
juniper	junos_os_evolved	22.2:r2-s2
juniper	junos_os_evolved	22.2:r3
juniper	junos_os_evolved	22.2:r3-s1
juniper	junos_os_evolved	22.2:r3-s2
juniper	junos_os_evolved	22.2:r3-s3
juniper	junos_os_evolved	22.2:r3-s4
juniper	junos_os_evolved	22.2:r3-s5
juniper	junos_os_evolved	22.2:r3-s6
juniper	junos_os_evolved	22.4
juniper	junos_os_evolved	22.4:r1
juniper	junos_os_evolved	22.4:r1-s1
juniper	junos_os_evolved	22.4:r1-s2
juniper	junos_os_evolved	22.4:r2
juniper	junos_os_evolved	22.4:r2-s1
juniper	junos_os_evolved	22.4:r2-s2
juniper	junos_os_evolved	22.4:r3
juniper	junos_os_evolved	22.4:r3-s1
juniper	junos_os_evolved	22.4:r3-s2
juniper	junos_os_evolved	22.4:r3-s3
juniper	junos_os_evolved	22.4:r3-s4
juniper	junos_os_evolved	22.4:r3-s5
juniper	junos_os_evolved	22.4:r3-s6
juniper	junos_os_evolved	23.2
juniper	junos_os_evolved	23.2:r1
juniper	junos_os_evolved	23.2:r1-s1
juniper	junos_os_evolved	23.2:r1-s2
juniper	junos_os_evolved	23.2:r2
juniper	junos_os_evolved	23.2:r2-s1
juniper	junos_os_evolved	23.2:r2-s2
juniper	junos_os_evolved	23.2:r2-s3
juniper	junos_os_evolved	23.4
juniper	junos_os_evolved	23.4:r1
juniper	junos_os_evolved	23.4:r1-s1
juniper	junos_os_evolved	23.4:r1-s2
juniper	junos_os_evolved	23.4:r2
juniper	junos_os_evolved	23.4:r2-s1
juniper	junos_os_evolved	23.4:r2-s2
juniper	junos_os_evolved	23.4:r2-s3
juniper	junos_os_evolved	24.2
juniper	junos_os_evolved	24.2:r1
juniper	junos_os_evolved	24.2:r1-s2
juniper	junos_os_evolved	24.4
juniper	junos_os_evolved	24.4:r1
juniper	junos_os_evolved	24.4:r1-s2
juniper	junos_os_evolved	24.4:r2

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-440 - Expected Behavior Violation
A feature, API, or function does not perform according to its specification.

References

https://supportportal.juniper.net/JSA100059

https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/task/routing-protocol-bgp-security-configuring.html