Junos OS (SRX firewalls)
CVE-2025-59961: Unix socket used to control the jdhcpd process is world-writable
An Incorrect Permission Assignment for Critical Resource vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged user to write to the Unix socket used to manage the jdhcpd process, resulting in complete control over the resource.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS 0 | 21.2R3-S10 or later |
| Junos OS 21.4 | 21.4R3-S12 or later |
| Junos OS 22.2 | 22.2* or later |
| Junos OS 22.4 | 22.4R3-S8 or later |
| Junos OS 23.2 | 23.2R2-S5 or later |
| Junos OS 23.4 | 23.4R2-S6 or later |
| Junos OS 24.2 | 24.2R2-S2 or later |
| Junos OS 24.4 | 24.4R2 or later |
| Junos OS 25.2 | 25.2R1-S1, 25.2R2 or later |
| Junos OS Evolved 0 | 22.4R3-S8-EVO or later |
| Junos OS Evolved 23.2 | 23.2R2-S5-EVO or later |
| Junos OS Evolved 23.4 | 23.4R2-S6-EVO or later |
| Junos OS Evolved 24.2 | 24.2R2-S2-EVO or later |
| Junos OS Evolved 24.4 | 24.4R2-EVO or later |
| Junos OS Evolved 25.2 | 25.2R1-S1-EVO, 25.2R2-EVO or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An Incorrect Permission Assignment for Critical Resource vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged user to write to the Unix socket used to manage the jdhcpd process, resulting in complete control over the resource.
This vulnerability allows any low-privileged user logged into the system to connect to the Unix socket and issue commands to manage the DHCP service, in essence, taking administrative control of the local DHCP server or DHCP relay.
This issue affects: Junos OS: * all versions before 21.2R3-S10, * all versions of 22.2, * from 21.4 before 21.4R3-S12, * from 22.4 before 22.4R3-S8, * from 23.2 before 23.2R2-S5, * from 23.4 before 23.4R2-S6, * from 24.2 before 24.2R2-S2, * from 24.4 before 24.4R2, * from 25.2 before 25.2R1-S1, 25.2R2;
Junos OS Evolved: * all versions before 22.4R3-S8-EVO, * from 23.2 before 23.2R2-S5-EVO, * from 23.4 before 23.4R2-S6-EVO, * from 24.2 before 24.2R2-S2-EVO, * from 24.4 before 24.4R2-EVO, * from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
Am I affected?
To be affected by this issue, a device must be configured with either:
[ forwarding-options dhcp-relay group <group-name> interface ... ] or
[ system services dhcp-local-server group <group-name> interface ... ]
Workarounds
Manually change permissions of the Unix socket used to control the jdhcpd server to only allow root access. For example:
root@junos> file change-permission filename /mfs/var/run/jdhcpd_mgmt permission 4700
Note: This change will not be persistent across reboots.
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.