An Improper Resource Shutdown or Release vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series with MS-MPC allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

When an MX Series device with an MS-MPC is configured with two or more service sets which are both processing SIP calls, a specific sequence of call events will lead to a crash and restart of the MS-MPC.
This issue affects Junos OS:



* all versions before 21.2R3-S9,
* 21.4 versions from 21.4R1,
* 22.2 versions before 22.2R3-S6,
* 22.4 versions before 22.4R3-S6.




As the MS-MPC is EoL after Junos OS 22.4, later versions are not affected.

This issue does not affect MX-SPC3 or SRX Series devices.
Advisories
Source ID Title
EUVD EUVD EUVD-2025-21148 An Improper Resource Shutdown or Release vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series with MS-MPC allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an MX Series device with an MS-MPC is configured with two or more service sets which are both processing SIP calls, a specific sequence of call events will lead to a crash and restart of the MS-MPC. This issue affects Junos OS: * all versions before 21.2R3-S9, * 21.4 versions from 21.4R1, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6. As the MS-MPC is EoL after Junos OS 22.4, later versions are not affected. This issue does not affect MX-SPC3 or SRX Series devices.
Fixes

Solution

The following software releases have been updated to resolve this specific issue: 21.2R3-S9, 22.2R3-S6, 22.4R3-S6, and all subsequent releases.


Workaround

There are no known workarounds for this issue. To reduce the risk of exploitation customers not requiring the SIP ALG functionality could explicitly disable it (in case it's by default enabled) by configuring: [ security alg sip disable ]

History

Tue, 15 Jul 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.0004}


Fri, 11 Jul 2025 15:30:00 +0000

Type Values Removed Values Added
Description An Improper Resource Shutdown or Release vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series with MS-MPC allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an MX Series device with an MS-MPC is configured with two or more service sets which are both processing SIP calls, a specific sequence of call events will lead to a crash and restart of the MS-MPC. This issue affects Junos OS: * all versions before 21.2R3-S9, * 21.4 versions from 21.4R1, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6. As the MS-MPC is EoL after Junos OS 22.4, later versions are not affected. This issue does not affect MX-SPC3 or SRX Series devices.
Title Junos OS: MX Series: When specific SIP packets are processed the MS-MPC will crash
Weaknesses CWE-404
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M'}


cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published:

Updated: 2025-07-15T19:55:34.678Z

Reserved: 2025-06-23T18:23:44.546Z

Link: CVE-2025-52982

cve-icon Vulnrichment

Updated: 2025-07-11T16:05:05.193Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-07-11T16:15:25.367

Modified: 2025-07-15T13:14:49.980

Link: CVE-2025-52982

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.