CVE-2025-52958

Summary

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).On all Junos OS and Junos OS Evolved devices, when route validation is enabled, a rare condition during BGP initial session establishment can lead to an rpd crash and restart. This occurs specifically when the connection request fails during error-handling scenario.

Continued session establishment failures leads to a sustained DoS condition. 

This issue affects Junos OS:

  • All versions before 22.2R3-S6,
  • from 22.4 before 22.4R3-S6,
  • 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 before 22.2R3-S6-EVO,
  • from 22.4 before 22.4R3-S6-EVO,
  • from 23.2 before 23.2R2-S3-EVO,
  • from 23.4 before 23.4R2-S4-EVO,
  • from 24.2 before 24.2R2-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS0 < 22.2R3-S6affected
Juniper NetworksJunos OS22.4 < 22.4R3-S6affected
Juniper NetworksJunos OS23.2 < 23.2R2-S3affected
Juniper NetworksJunos OS23.4 < 23.4R2-S4affected
Juniper NetworksJunos OS24.2 < 24.2R2affected
Juniper NetworksJunos OS Evolved0 < 22.2R3-S6-EVOaffected
Juniper NetworksJunos OS Evolved22.4 < 22.4R3-S6-EVOaffected
Juniper NetworksJunos OS Evolved23.2 < 23.2R2-S3-EVOaffected
Juniper NetworksJunos OS Evolved23.4 < 23.4R2-S4-EVOaffected
Juniper NetworksJunos OS Evolved24.2 < 24.2R2-EVOaffected

Weaknesses

  • CWE-617: CWE-617 Reachable Assertion

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References