CVE-2025-30655

Summary

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to cause a Denial-of-Service (DoS).

When a specific "show bgp neighbor" CLI command is run, the rpd cpu utilization rises and eventually causes a crash and restart. Repeated use of this command will cause a sustained DoS condition. 

The device is only affected if BGP RIB sharding and update-threading is enabled. This issue affects Junos OS: 

  • All versions before 21.2R3-S9, 
  • from 21.4 before 21.4R3-S8,
  • from 22.2 before 22.2R3-S6, 
  • from 22.4 before 22.4R3-S2, 
  • from 23.2 before 23.2R2-S3, 
  • from 23.4 before 23.4R2.

and Junos OS Evolved: 

  • All versions before 21.2R3-S9-EVO, 
  • from 21.4-EVO before 21.4R3-S8-EVO, 
  • from 22.2-EVO before 22.2R3-S6-EVO, 
  • from 22.4-EVO before 22.4R3-S2-EVO, 
  • from 23.2-EVO before 23.2R2-S3-EVO, 
  • from 23.4-EVO before 23.4R2-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS0 < 21.2R3-S9affected
Juniper NetworksJunos OS21.4 < 21.4R3-S8affected
Juniper NetworksJunos OS22.2 < 22.2R3-S6affected
Juniper NetworksJunos OS22.4 < 22.4R3-S2affected
Juniper NetworksJunos OS23.2 < 23.2R2-S3affected
Juniper NetworksJunos OS23.4 < 23.4R2affected
Juniper NetworksJunos OS Evolved0 < 21.2R3-S9-EVOaffected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R3-S8-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-S6-EVOaffected
Juniper NetworksJunos OS Evolved22.4-EVO < 22.4R3-S2-EVOaffected
Juniper NetworksJunos OS Evolved23.2-EVO < 23.2R2-S3-EVOaffected
Juniper NetworksJunos OS Evolved23.4-EVO < 23.4R2-EVOaffected

Weaknesses

  • CWE-754: CWE-754 Improper Check for Unusual or Exceptional Conditions

Workarounds

There are no known workarounds for this issue. Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.

ADP Enrichment

CISA ADP Vulnrichment

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

References