{"cve":"CVE-2024-39552","nvd":{"published":"2024-07-11T17:15:16.370","modified":"2026-06-17T07:42:12.327","status":"Analyzed","description":"An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).\n\nWhen a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.\n\nContinuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.\n\nThis issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations.  This issue requires a remote attacker to have at least one established BGP session.\n\nThis issue affects:\n \nJuniper Networks Junos OS:\n  *  All versions earlier than 20.4R3-S9;\n  *  21.2 versions earlier than 21.2R3-S7;\n  *  21.3 versions earlier than 21.3R3-S5;\n  *  21.4 versions earlier than 21.4R3-S6;\n  *  22.1 versions earlier than 22.1R3-S4;\n  *  22.2 versions earlier than 22.2R3-S3;\n  *  22.3 versions earlier than 22.3R3-S2;\n  *  22.4 versions earlier than 22.4R3;\n  *  23.2 versions earlier than 23.2R2.\n\n\n\nJuniper Networks Junos OS Evolved:\n  *  All versions earlier than 21.2R3-S7;\n  *  21.3-EVO versions earlier than 21.3R3-S5;\n  *  21.4-EVO versions earlier than 21.4R3-S8;\n  *  22.1-EVO versions earlier than 22.1R3-S4;\n  *  22.2-EVO versions earlier than 22.2R3-S3;\n  *  22.3-EVO versions earlier than 22.3R3-S2;\n  *  22.4-EVO versions earlier than 22.4R3;\n  *  23.2-EVO versions earlier than 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/R:A","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-755"],"references":["https://supportportal.juniper.net/JSA75726","https://supportportal.juniper.net/JSA75726"],"products":["juniper:junos","juniper:junos_os_evolved"],"source":"nvd","synced_at":"2026-10-19T21:52:42.518321223+00:00"},"epss":{"cve":"CVE-2024-39552","score":0.00593,"percentile":0.48375,"date":"2026-10-31"},"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."]}