{"cve":"CVE-2024-39551","nvd":{"published":"2024-07-11T17:15:16.140","modified":"2026-06-17T07:42:12.130","status":"Analyzed","description":"An Uncontrolled Resource Consumption vulnerability in the H.323 ALG (Application Layer Gateway) of  Juniper Networks Junos OS on SRX Series and MX Series with SPC3 and MS-MPC/MIC, allows an unauthenticated network-based attacker to send specific packets causing traffic loss leading to Denial of Service (DoS). \n\nContinued receipt and processing of these specific packets will sustain the Denial of Service condition.\n\nThe memory usage can be monitored using the below command.\n\n  user@host> show usp memory segment sha data objcache jsf \nThis issue affects SRX Series and MX Series with SPC3 and MS-MPC/MIC: \n\n  *   20.4 before 20.4R3-S10, \n  *   21.2 before 21.2R3-S6, \n  *   21.3 before 21.3R3-S5, \n  *   21.4 before 21.4R3-S6, \n  *   22.1 before 22.1R3-S4, \n  *   22.2 before 22.2R3-S2, \n  *   22.3 before 22.3R3-S1, \n  *   22.4 before 22.4R3, \n  *   23.2 before 23.2R2.","cvss_v4":{"vector":"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","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://supportportal.juniper.net/JSA83013","https://supportportal.juniper.net/JSA83013"],"products":["juniper:junos"],"source":"nvd","synced_at":"2026-10-19T21:52:42.518321223+00:00"},"epss":{"cve":"CVE-2024-39551","score":0.00476,"percentile":0.41105,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}