Junos OS: SRX Series and MX Series: Receipt of specific SIP packets in a high utilization situation causes a flowd/mspmand crash

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-52960
StatePUBLISHED
Assignerjuniper
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-09 16:15:45 UTC
Updated2026-10-08 13:10:00 UTC
DescriptionA Buffer Copy without Checking Size of Input vulnerability in the Session Initialization Protocol (SIP) ALG of Juniper Networks Junos OS on MX Series and SRX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). When memory utilization is high, and specific SIP packets are received, flowd/mspmand crashes. While the system recovers automatically, the disruption can significantly impact service stability. Continuous receipt of these specific SIP packets, while high utilization is present, will cause a sustained DoS condition. The utilization is outside the attackers control, so they would not be able to deterministically exploit this. This issue affects Junos OS on SRX Series and MX Series:  * All versions before 22.4R3-S7, * from 23.2 before 23.2R2-S4, * from 23.4 before 23.4R2-S5, * from 24.2 before 24.2R2.

Risk And Classification

Primary CVSS: v4.0 8.2 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X

EPSS: 0.003310000 probability, percentile 0.243010000 (date 2026-10-08)

Problem Types: CWE-120 | CWE-120 CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/C...
4.0CNACVSS8.2HIGHCVSS: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/...
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
Low

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Juniper Junos All All All All
Operating System Juniper Junos 22.4 - All All
Operating System Juniper Junos 22.4 r1 All All
Operating System Juniper Junos 22.4 r1-s1 All All
Operating System Juniper Junos 22.4 r1-s2 All All
Operating System Juniper Junos 22.4 r2 All All
Operating System Juniper Junos 22.4 r2-s1 All All
Operating System Juniper Junos 22.4 r2-s2 All All
Operating System Juniper Junos 22.4 r3 All All
Operating System Juniper Junos 22.4 r3-s1 All All
Operating System Juniper Junos 22.4 r3-s2 All All
Operating System Juniper Junos 22.4 r3-s3 All All
Operating System Juniper Junos 22.4 r3-s4 All All
Operating System Juniper Junos 22.4 r3-s5 All All
Operating System Juniper Junos 22.4 r3-s6 All All
Operating System Juniper Junos 23.2 - All All
Operating System Juniper Junos 23.2 r1 All All
Operating System Juniper Junos 23.2 r1-s1 All All
Operating System Juniper Junos 23.2 r1-s2 All All
Operating System Juniper Junos 23.2 r2 All All
Operating System Juniper Junos 23.2 r2-s1 All All
Operating System Juniper Junos 23.2 r2-s2 All All
Operating System Juniper Junos 23.2 r2-s3 All All
Operating System Juniper Junos 23.4 - All All
Operating System Juniper Junos 23.4 r1 All All
Operating System Juniper Junos 23.4 r1-s1 All All
Operating System Juniper Junos 23.4 r1-s2 All All
Operating System Juniper Junos 23.4 r2 All All
Operating System Juniper Junos 23.4 r2-s1 All All
Operating System Juniper Junos 23.4 r2-s2 All All
Operating System Juniper Junos 23.4 r2-s3 All All
Operating System Juniper Junos 23.4 r2-s4 All All
Operating System Juniper Junos 24.2 - All All
Operating System Juniper Junos 24.2 r1 All All
Operating System Juniper Junos 24.2 r1-s1 All All
Operating System Juniper Junos 24.2 r1-s2 All All
Hardware Juniper Mx10004 - All All All
Hardware Juniper Mx10008 - All All All
Hardware Juniper Mx2008 - All All All
Hardware Juniper Mx2010 - All All All
Hardware Juniper Mx2020 - All All All
Hardware Juniper Mx204 - All All All
Hardware Juniper Mx240 - All All All
Hardware Juniper Mx304 - All All All
Hardware Juniper Mx480 - All All All
Hardware Juniper Mx960 - All All All
Hardware Juniper Srx1500 - All All All
Hardware Juniper Srx1600 - All All All
Hardware Juniper Srx2300 - All All All
Hardware Juniper Srx300 - All All All
Hardware Juniper Srx320 - All All All
Hardware Juniper Srx340 - All All All
Hardware Juniper Srx345 - All All All
Hardware Juniper Srx380 - All All All
Hardware Juniper Srx4100 - All All All
Hardware Juniper Srx4120 - All All All
Hardware Juniper Srx4200 - All All All
Hardware Juniper Srx4300 - All All All
Hardware Juniper Srx4600 - All All All
Hardware Juniper Srx4700 - All All All
Hardware Juniper Srx5400 - All All All
Hardware Juniper Srx5600 - All All All
Hardware Juniper Srx5800 - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Juniper Networks Junos OS affected 22.4R3-S7 semver SRX Series, MX Series
CNA Juniper Networks Junos OS affected 23.2 23.2R2-S4 semver SRX Series, MX Series
CNA Juniper Networks Junos OS affected 23.4 23.4R2-S5 semver SRX Series, MX Series
CNA Juniper Networks Junos OS affected 24.2 24.2R2 semver SRX Series, MX Series

References

ReferenceSourceLinkTags
supportportal.juniper.net/JSA103143 [email protected] supportportal.juniper.net Vendor Advisory
kb.juniper.net/JSA103143 [email protected] kb.juniper.net Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: The following software releases have been updated to resolve this specific issue: 22.4R3-S7, 23.2R2-S4, 23.4R2-S5, 24.2R2, 24.4R1, and all subsequent releases.

Workarounds

CNA: 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 ]

Exploits

CNA: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report