{"id":"CVE-2024-21598","aliases":["EUVD-2024-19246","GHSA-p5h3-wwqf-f5rv"],"status":"published","title":"Junos OS and Junos OS Evolved: A malformed BGP tunnel encapsulation attribute will lead to an rpd crash","description":"An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.\n\nThis issue affects Juniper Networks\nJunos OS:\n  *  20.4 versions 20.4R1 and later 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-S5;\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-S1;\n  *  22.4 versions earlier than 22.4R3;\n  *  23.2 versions earlier than 23.2R1-S2, 23.2R2;\n\n\n\nJunos OS Evolved:\n  *  20.4-EVO versions 20.4R1-EVO and later versions earlier than 20.4R3-S9-EVO;\n  *  21.2-EVO versions earlier than 21.2R3-S7-EVO;\n  *  21.3-EVO versions earlier than 21.3R3-S5-EVO;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S4-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-S3-EVO;\n  *  22.3-EVO versions earlier than 22.3R3-S1-EVO;\n  *  22.4-EVO versions earlier than 22.4R3-EVO;\n  *  23.2-EVO versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO;\n\n\n\nThis issue does not affect Juniper Networks\n  *  Junos OS versions earlier than 20.4R1;\n  *  Junos OS Evolved versions earlier than 20.4R1-EVO.\n\n\n\nThis is a related but separate issue than the one described in JSA79095.","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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00571,"percentile":0.47711,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1286"],"published":"2024-04-12T14:54:23Z","modified":"2026-06-17T07:09:47Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper","product":"junos_os_evolved"},{"vendor":"juniper networks","product":"junos os"},{"vendor":"juniper networks","product":"junos os evolved"},{"vendor":"juniper_networks","product":"junos_os"}],"references":[{"url":"http://supportportal.juniper.net/JSA75739","tags":["vendor-advisory","x_transferred","Vendor Advisory"]},{"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:L","tags":["technical-description","x_transferred","Not Applicable"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21598"},{"url":"http://supportportal.juniper.netJSA75739"},{"url":"https://github.com/advisories/GHSA-p5h3-wwqf-f5rv"}],"sources":{"cve":[{"id":"CVE-2024-21598","title":"Junos OS and Junos OS Evolved: A malformed BGP tunnel encapsulation attribute will lead to an rpd crash","description":"An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.\n\nThis issue affects Juniper Networks\nJunos OS:\n  *  20.4 versions 20.4R1 and later 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-S5;\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-S1;\n  *  22.4 versions earlier than 22.4R3;\n  *  23.2 versions earlier than 23.2R1-S2, 23.2R2;\n\n\n\nJunos OS Evolved:\n  *  20.4-EVO versions 20.4R1-EVO and later versions earlier than 20.4R3-S9-EVO;\n  *  21.2-EVO versions earlier than 21.2R3-S7-EVO;\n  *  21.3-EVO versions earlier than 21.3R3-S5-EVO;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S4-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-S3-EVO;\n  *  22.3-EVO versions earlier than 22.3R3-S1-EVO;\n  *  22.4-EVO versions earlier than 22.4R3-EVO;\n  *  23.2-EVO versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO;\n\n\n\nThis issue does not affect Juniper Networks\n  *  Junos OS versions earlier than 20.4R1;\n  *  Junos OS Evolved versions earlier than 20.4R1-EVO.\n\n\n\nThis is a related but separate issue than the one described in JSA79095.","status":"published","published":"2024-04-12T14:54:23.761Z","modified":"2024-08-01T22:27:36.007Z","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","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-1286"],"updated_at":"2026-11-02T14:34:05.077718Z"}],"euvd":[{"id":"EUVD-2024-19246","description":"An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.\n\nThis issue affects Juniper Networks\nJunos OS:\n  *  20.4 versions 20.4R1 and later 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-S5;\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-S1;\n  *  22.4 versions earlier than 22.4R3;\n  *  23.2 versions earlier than 23.2R1-S2, 23.2R2;\n\n\n\nJunos OS Evolved:\n  *  20.4-EVO versions 20.4R1-EVO and later versions earlier than 20.4R3-S9-EVO;\n  *  21.2-EVO versions earlier than 21.2R3-S7-EVO;\n  *  21.3-EVO versions earlier than 21.3R3-S5-EVO;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S4-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-S3-EVO;\n  *  22.3-EVO versions earlier than 22.3R3-S1-EVO;\n  *  22.4-EVO versions earlier than 22.4R3-EVO;\n  *  23.2-EVO versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO;\n\n\n\nThis issue does not affect Juniper Networks\n  *  Junos OS versions earlier than 20.4R1;\n  *  Junos OS Evolved versions earlier than 20.4R1-EVO.\n\n\n\nThis is a related but separate issue than the one described in JSA79095.","status":"published","published":"2024-04-12T14:54:23Z","modified":"2024-08-01T22:27:36Z","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","level":"high"}],"updated_at":"2026-11-03T03:50:29.983832Z"}],"ghsa":[{"id":"GHSA-p5h3-wwqf-f5rv","title":"An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol...","description":"An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.\n\nThis issue affects Juniper Networks\nJunos OS:\n  *  20.4 versions 20.4R1 and later 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-S5;\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-S1;\n  *  22.4 versions earlier than 22.4R3;\n  *  23.2 versions earlier than 23.2R1-S2, 23.2R2;\n\n\n\nJunos OS Evolved:\n  *  20.4-EVO versions 20.4R1-EVO and later versions earlier than 20.4R3-S9-EVO;\n  *  21.2-EVO versions earlier than 21.2R3-S7-EVO;\n  *  21.3-EVO versions earlier than 21.3R3-S5-EVO;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S4-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-S3-EVO;\n  *  22.3-EVO versions earlier than 22.3R3-S1-EVO;\n  *  22.4-EVO versions earlier than 22.4R3-EVO;\n  *  23.2-EVO versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO;\n\n\n\nThis issue does not affect Juniper Networks\n  *  Junos OS versions earlier than 20.4R1;\n  *  Junos OS Evolved versions earlier than 20.4R1-EVO.\n\n\n\nThis is a related but separate issue than the one described in JSA79095.","status":"published","published":"2024-04-12T15:37:21Z","modified":"2025-02-06T18:31:01Z","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:X/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-1286"],"updated_at":"2026-11-02T14:59:48.779987Z"}],"nvd":[{"id":"CVE-2024-21598","description":"An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).\n\nIf a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.\n\nThis issue affects Juniper Networks\nJunos OS:\n  *  20.4 versions 20.4R1 and later 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-S5;\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-S1;\n  *  22.4 versions earlier than 22.4R3;\n  *  23.2 versions earlier than 23.2R1-S2, 23.2R2;\n\n\n\nJunos OS Evolved:\n  *  20.4-EVO versions 20.4R1-EVO and later versions earlier than 20.4R3-S9-EVO;\n  *  21.2-EVO versions earlier than 21.2R3-S7-EVO;\n  *  21.3-EVO versions earlier than 21.3R3-S5-EVO;\n  *  21.4-EVO versions earlier than 21.4R3-S5-EVO;\n  *  22.1-EVO versions earlier than 22.1R3-S4-EVO;\n  *  22.2-EVO versions earlier than 22.2R3-S3-EVO;\n  *  22.3-EVO versions earlier than 22.3R3-S1-EVO;\n  *  22.4-EVO versions earlier than 22.4R3-EVO;\n  *  23.2-EVO versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO;\n\n\n\nThis issue does not affect Juniper Networks\n  *  Junos OS versions earlier than 20.4R1;\n  *  Junos OS Evolved versions earlier than 20.4R1-EVO.\n\n\n\nThis is a related but separate issue than the one described in JSA79095.","status":"published","published":"2024-04-12T15:15:23.377Z","modified":"2026-06-17T07:09:47.837Z","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:X/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-1286"],"updated_at":"2026-11-02T14:09:50.299382Z"}]}}