CVE-2025-52955

EUVD-2025-21163
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
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
juniperCNA
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: 12%
Affected Products (NVD)
VendorProductVersion
juniperjunos
𝑥
< 21.2
juniperjunos
21.2
juniperjunos
21.2:r1
juniperjunos
21.2:r1-s1
juniperjunos
21.2:r1-s2
juniperjunos
21.2:r2
juniperjunos
21.2:r2-s1
juniperjunos
21.2:r2-s2
juniperjunos
21.2:r3
juniperjunos
21.2:r3-s1
juniperjunos
21.2:r3-s2
juniperjunos
21.2:r3-s3
juniperjunos
21.2:r3-s4
juniperjunos
21.2:r3-s5
juniperjunos
21.2:r3-s6
juniperjunos
21.2:r3-s7
juniperjunos
21.2:r3-s8
juniperjunos
21.4
juniperjunos
22.2
juniperjunos
22.4
juniperjunos
22.4:r1
juniperjunos
22.4:r1-s1
juniperjunos
22.4:r1-s2
juniperjunos
22.4:r2
juniperjunos
22.4:r2-s1
juniperjunos
22.4:r2-s2
juniperjunos
22.4:r3
juniperjunos
22.4:r3-s1
juniperjunos
22.4:r3-s2
juniperjunos
22.4:r3-s3
juniperjunos
22.4:r3-s4
juniperjunos
22.4:r3-s5
juniperjunos
22.4:r3-s6
juniperjunos
23.2
juniperjunos
23.2:r1
juniperjunos
23.2:r1-s1
juniperjunos
23.2:r1-s2
juniperjunos
23.2:r2
juniperjunos
23.2:r2-s1
juniperjunos
23.2:r2-s2
juniperjunos
23.4
juniperjunos
23.4:r1
juniperjunos
23.4:r1-s1
juniperjunos
23.4:r1-s2
juniperjunos
23.4:r2
juniperjunos
23.4:r2-s1
juniperjunos
23.4:r2-s2
juniperjunos
23.4:r2-s3
juniperjunos
24.2
juniperjunos
24.2:r1
juniperjunos
24.2:r1-s1
juniperjunos
24.2:r1-s2
juniperjunos_os_evolved
21.2
juniperjunos_os_evolved
21.4
juniperjunos_os_evolved
22.2
juniperjunos_os_evolved
22.4
juniperjunos_os_evolved
22.4:r1
juniperjunos_os_evolved
22.4:r1-s1
juniperjunos_os_evolved
22.4:r1-s2
juniperjunos_os_evolved
22.4:r2
juniperjunos_os_evolved
22.4:r2-s1
juniperjunos_os_evolved
22.4:r2-s2
juniperjunos_os_evolved
22.4:r3
juniperjunos_os_evolved
22.4:r3-s1
juniperjunos_os_evolved
22.4:r3-s2
juniperjunos_os_evolved
22.4:r3-s3
juniperjunos_os_evolved
22.4:r3-s4
juniperjunos_os_evolved
22.4:r3-s5
juniperjunos_os_evolved
22.4:r3-s6
juniperjunos_os_evolved
23.2
juniperjunos_os_evolved
23.2:r1
juniperjunos_os_evolved
23.2:r1-s1
juniperjunos_os_evolved
23.2:r1-s2
juniperjunos_os_evolved
23.2:r2
juniperjunos_os_evolved
23.2:r2-s1
juniperjunos_os_evolved
23.2:r2-s2
juniperjunos_os_evolved
23.4
juniperjunos_os_evolved
23.4:r1
juniperjunos_os_evolved
23.4:r1-s1
juniperjunos_os_evolved
23.4:r1-s2
juniperjunos_os_evolved
23.4:r2
juniperjunos_os_evolved
23.4:r2-s1
juniperjunos_os_evolved
23.4:r2-s2
juniperjunos_os_evolved
23.4:r2-s3
juniperjunos_os_evolved
24.2
juniperjunos_os_evolved
24.2:r1
juniperjunos_os_evolved
24.2:r1-s2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://supportportal.juniper.net/JSA100062