CVE-2025-30648

Summary

An Improper Input Validation vulnerability in the Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause the jdhcpd process to crash resulting in a Denial of Service (DoS).

When a specifically malformed DHCP packet is received from a DHCP client, the jdhcpd process crashes, which will lead to the unavailability of the DHCP service and thereby resulting in a sustained DoS. The DHCP process will restart automatically to recover the service.

This issue will occur when dhcp-security is enabled.  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-S6, 
  • from 23.2 before 23.2R2-S3, 
  • from 23.4 before 23.4R2-S4, 
  • from 24.2 before 24.2R2; 

Junos OS Evolved:  * 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 < 21.2R3-S9affected
Juniper NetworksJunos OS21.4 < 21.4R3-S10affected
Juniper NetworksJunos OS22.2 < 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 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-20: CWE-20 Improper Input Validation

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CISA ADP Vulnrichment

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

References