{“lastseen”:””,”description”:”A Loop with Unreachable Exit Condition (‘Infinite Loop’) vulnerability in the SIP application layer gateway (ALG) of Juniper Networks Junos OS on SRX Series and MX Series with MX-SPC3 or MS-MPC allows an unauthenticated network-based attacker sending specific SIP messages over TCP to crash the flow management process, leading to a Denial of Service (DoS).\\n\\nOn SRX Series, and MX Series with MX-SPC3 or MS-MPC service cards, receipt of multiple SIP messages causes the SIP headers to be parsed incorrectly, eventually causing a continuous loop and leading to a watchdog timer expiration, crashing the flowd process on SRX Series and MX Series with MX-SPC3, or mspmand process on MX Series with MS-MPC.\\n\\nThis issue only occurs over TCP. SIP messages sent over UDP cannot trigger this issue.\\n\\nThis issue affects Junos OS on SRX Series and MX Series with MX-SPC3 and MS-MPC:\\n\\n\\n\\n * all versions before 21.2R3-S10,\u00a0\\n * from 21.4 before 21.4R3-S12,\u00a0\\n * from 22.4 before 22.4R3-S8,\u00a0\\n * from 23.2 before 23.2R2-S5,\u00a0\\n * from 23.4 before 23.4R2-S6,\u00a0\\n * from 24.2 before 24.2R2-S3,\u00a0\\n * from 24.4 before 24.4R2-S1,\u00a0\\n * from 25.2 before 25.2R1-S1, 25.2R2.”,”published”:”2026-01-15T20:19:22.158Z”,”modified”:”2026-01-15T20:19:22.158Z”,”type”:”cve”,”title”:”Junos OS: SRX Series, MX Series with MX-SPC3 or MS-MPC: Receipt of multiple specific SIP messages results in flow management process crash”,”source”:”juniper”,”references”:”https:\/\/supportportal.juniper.net\/JSA106004\\nhttps:\/\/kb.juniper.net\/JSA106004″,”id”:”CVE-2026-21905″,”bulletinFamily”:””,”cwe”:[“CWE-835″],”cvelist”:null,”sourceData”:”Juniper Networks Junos OS 0\\nJuniper Networks Junos OS 21.4\\nJuniper Networks Junos OS 22.4\\nJuniper Networks Junos OS 23.2\\nJuniper Networks Junos OS 23.4\\nJuniper Networks Junos OS 24.2\\nJuniper Networks Junos OS 24.4\\nJuniper Networks Junos OS 25.2″,”sourceHref”:””,”cvss”:{“score”:7.5,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:N\/AC:L\/PR:N\/UI:N\/S:U\/C:N\/I:N\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Junos OS”,”version”:”0″,”vendor”:”Juniper Networks”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”A Loop with Unreachable Exit Condition (‘Infinite Loop’) vulnerability in the SIP application layer gateway (ALG) of Juniper Networks Junos OS on SRX Series and…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,16,12,15,13,7,11,5],"class_list":["post-35909","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-75","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n