CVE-2025-30651

Summary

A Buffer Access with Incorrect Length Value vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). When an attacker sends a specific ICMPv6 packet to an interface with "protocols router-advertisement" configured, rpd crashes and restarts. Continued receipt of this packet will cause a sustained DoS condition. 

This issue only affects systems configured with IPv6.

This issue affects Junos OS: 

  • All versions before 21.2R3-S9, 
  • from 21.4 before 21.4R3-S10,
  • from 22.2 before 22.2R3-S6,
  • from 22.4 before 22.4R3-S4,
  • from 23.2 before 23.2R2-S2,
  • from 23.4 before 23.4R2;

and Junos OS Evolved:

  • All versions before 21.2R3-S9-EVO,
  • from 21.4-EVO before 21.4R3-S10-EVO,
  • from 22.2-EVO before 22.2R3-S6-EVO,
  • from 22.4-EVO before 22.4R3-S4-EVO,
  • from 23.2-EVO before 23.2R2-S2-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-S10affected
Juniper NetworksJunos OS22.2 < 22.2R3-S6affected
Juniper NetworksJunos OS22.4 < 22.4R3-S4affected
Juniper NetworksJunos OS23.2 < 23.2R2-S2affected
Juniper NetworksJunos OS23.4 < 23.4R2affected
Juniper NetworksJunos OS Evolved0 < 21.2R3-S9-EVOaffected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R3-S10-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-S6-EVOaffected
Juniper NetworksJunos OS Evolved22.4-EVO < 22.4R3-S4-EVOaffected
Juniper NetworksJunos OS Evolved23.2-EVO < 23.2R2-S2-EVOaffected
Juniper NetworksJunos OS Evolved23.4-EVO < 23.4R2-EVOaffected

Weaknesses

  • CWE-805: CWE-805 Buffer Access with Incorrect Length Value

Workarounds

There are no known workarounds for this issue.

A firewall filter can be implemented to restrict ICMPv6 traffic.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References