{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-30656","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","state":"PUBLISHED","assignerShortName":"juniper","dateReserved":"2025-03-24T19:34:11.322Z","datePublished":"2025-04-09T20:01:48.339Z","dateUpdated":"2025-04-10T14:23:32.306Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["MX Series","SRX Series"],"product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"21.2R3-S9","status":"affected","version":"0","versionType":"semver"},{"lessThan":"21.4R3-S10","status":"affected","version":"21.4","versionType":"semver"},{"lessThan":"22.2R3-S6","status":"affected","version":"22.2","versionType":"semver"},{"lessThan":"22.4R3-S5","status":"affected","version":"22.4","versionType":"semver"},{"lessThan":"23.2R2-S3","status":"affected","version":"23.2","versionType":"semver"},{"lessThan":"23.4R2-S3","status":"affected","version":"23.4","versionType":"semver"},{"lessThan":"24.2R1-S2, 24.2R2","status":"affected","version":"24.2","versionType":"semver"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"

To be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. Please verify on SRX, and MX with SPC3 with:

user@host> show security alg status | match sip
SIP : Enabled


Please verify on MX whether the following is configured:

[ services ... rule <rule-name> (term <term-name> ) from/match application/application-set <name> ]

where either

a. name = junos-sip or

an application or application-set refers to SIP:

b. [ applications application <name> application-protocol sip ] or
c. [ applications application-set <name> application junos-sip ]\n\n
"}],"value":"To be affected the SIP ALG needs to be enabled, either implicitly / by default or by way of configuration. Please verify on SRX, and MX with SPC3 with:\n\nuser@host> show security alg status | match sip\nSIP : Enabled\n\n\n\nPlease verify on MX whether the following is configured:\n\n[ services ... rule (term ) from/match application/application-set ]\nwhere either\n\na. name = junos-sip or\nan application or application-set refers to SIP:\n\nb. [ applications application application-protocol sip ] or\nc. [ applications application-set application junos-sip ]"}],"datePublic":"2025-04-09T16:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"An Improper Handling of Additional Special Element vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MS-MPC, MS-MIC and SPC3, and SRX Series, allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

\n\nIf the SIP ALG processes specifically formatted SIP invites, a memory corruption will occur which will lead to a crash of the FPC processing these packets. Although the system will automatically recover with the restart of the FPC, subsequent SIP invites will cause the crash again and lead to a sustained DoS.


This issue affects Junos OS on MX Series and SRX Series: 

  • all versions before 21.2R3-S9,
  • 21.4 versions before 21.4R3-S10,
  • 22.2 versions before 22.2R3-S6,
  • 22.4 versions before 22.4R3-S5,
  • 23.2 versions before 23.2R2-S3,
  • 23.4 versions before 23.4R2-S3,
  • 24.2 versions before 24.2R1-S2, 24.2R2.

"}],"value":"An Improper Handling of Additional Special Element vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX Series with MS-MPC, MS-MIC and SPC3, and SRX Series, allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nIf the SIP ALG processes specifically formatted SIP invites, a memory corruption will occur which will lead to a crash of the FPC processing these packets. Although the system will automatically recover with the restart of the FPC, subsequent SIP invites will cause the crash again and lead to a sustained DoS.\n\n\n\n\nThis issue affects Junos OS on MX Series and SRX Series: \n\n * all versions before 21.2R3-S9,\n * 21.4 versions before 21.4R3-S10,\n * 22.2 versions before 22.2R3-S6,\n * 22.4 versions before 22.4R3-S5,\n * 23.2 versions before 23.2R2-S3,\n * 23.4 versions before 23.4R2-S3,\n * 24.2 versions before 24.2R1-S2, 24.2R2."}],"exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"YES","Recovery":"AUTOMATIC","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"MODERATE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-167","description":"CWE-167 Improper Handling of Additional Special Element","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","shortName":"juniper","dateUpdated":"2025-04-09T20:01:48.339Z"},"references":[{"tags":["vendor-advisory"],"url":"https://supportportal.juniper.net/JSA96466"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The following software releases have been updated to resolve this specific issue: 21.2R3-S9, \n\n21.4R3-S10, 22.2R3-S6, 22.4R3-S5, 23.2R2-S3, 23.4R2-S3, 24.2R1-S2, 24.2R2, 24.4R1, and all subsequent releases."}],"value":"The following software releases have been updated to resolve this specific issue: 21.2R3-S9, \n\n21.4R3-S10, 22.2R3-S6, 22.4R3-S5, 23.2R2-S3, 23.4R2-S3, 24.2R1-S2, 24.2R2, 24.4R1, and all subsequent releases."}],"source":{"advisory":"JSA96466","defect":["1833097"],"discovery":"USER"},"timeline":[{"lang":"en","time":"2025-04-09T16:00:00.000Z","value":"Initial Publication"}],"title":"Junos OS: MX Series, SRX Series: Processing of specific SIP INVITE messages by the SIP ALG will lead to an FPC crash","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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\n\n\n\n]"}],"value":"There are no known workarounds for this issue.\n\nTo 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:\n\n[ security alg sip disable\n\n\n\n]"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-04-09T20:24:04.424419Z","id":"CVE-2025-30656","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-04-10T14:23:32.306Z"}}]}}