{"id":"CVE-2024-39552","aliases":["EUVD-2024-38078","GHSA-3fgw-53wh-c98c"],"status":"published","title":"Junos OS and Junos OS Evolved: Malformed BGP UPDATE causes RPD crash","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.","severity":{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00593,"percentile":0.48697,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-755"],"published":"2024-07-11T16:30:36Z","modified":"2026-06-17T07:42:12Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper","product":"junos_os_evolved"},{"vendor":"juniper networks","product":"junos os"},{"vendor":"juniper networks","product":"junos os evolved"}],"references":[{"url":"https://supportportal.juniper.net/JSA75726","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39552"},{"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"url":"https://github.com/advisories/GHSA-3fgw-53wh-c98c"}],"sources":{"cve":[{"id":"CVE-2024-39552","title":"Junos OS and Junos OS Evolved: Malformed BGP UPDATE causes RPD crash","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.","status":"published","published":"2024-07-11T16:30:36.672Z","modified":"2024-08-02T04:26:15.942Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:34:18.951288Z"}],"euvd":[{"id":"EUVD-2024-38078","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.","status":"published","published":"2024-07-11T16:30:36Z","modified":"2024-08-02T04:26:15Z","cvss":[{"version":"4.0","score":8.7,"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","level":"high"}],"updated_at":"2026-11-03T03:50:18.019857Z"}],"ghsa":[{"id":"GHSA-3fgw-53wh-c98c","title":"An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD)...","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.","status":"published","published":"2024-07-11T18:31:14Z","modified":"2024-07-31T00:30:48Z","cvss":[{"version":"4.0","score":8.7,"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/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:X/R:A/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:57:45.165794Z"}],"nvd":[{"id":"CVE-2024-39552","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.","status":"published","published":"2024-07-11T17:15:16.37Z","modified":"2026-06-17T07:42:12.327Z","cvss":[{"version":"4.0","score":8.7,"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/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:X/R:A/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-755"],"updated_at":"2026-11-02T14:10:12.994089Z"}]}}