{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-39554", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-39554", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-07-10T22:32:34.310Z", "updatedAt": "2024-08-02T04:26:15.931Z", "importedAt": "2026-10-24T01:57:16.009Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Junos OS and Junos OS Evolved: BGP multipath incremental calculation is resulting in an rpd crash", "summary": "A Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability the \n\nRouting Protocol Daemon (rpd)\n\n of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to inject incremental routing updates when BGP multipath is enabled, causing rpd to crash and restart, resulting in a Denial of Service (DoS). Since this is a timing issue (race condition), the successful exploitation of this vulnerability is outside the attacker's control.  However, continued receipt and processing of this packet may create a sustained Denial of Service (DoS) condition.\n\nOn all Junos OS and Junos OS Evolved platforms with BGP multipath enabled, a specific multipath calculation removes the original next hop from the multipath lead routes nexthop-set. When this change happens, multipath relies on certain internal timing to record the update.  Under certain circumstance and with specific timing, this could result in an rpd crash.\n\nThis issue only affects systems with BGP multipath enabled.\n\n\nThis issue affects:\n\nJunos OS: \n\n\n * All versions of 21.1\n * from 21.2 before 21.2R3-S7, \n * from 21.4 before 21.4R3-S6, \n * from 22.1 before 22.1R3-S5, \n * from 22.2 before 22.2R3-S3, \n * from 22.3 before 22.3R3-S2, \n * from 22.4 before 22.4R3, \n * from 23.2 before 23.2R2.\n\n\n\n\nJunos OS Evolved: \n\n\n * All versions of 21.1-EVO,\n * All versions of 21.2-EVO,\n * from 21.4-EVO before 21.4R3-S6-EVO, \n * from 22.1-EVO before 22.1R3-S5-EVO, \n * from 22.2-EVO before 22.2R3-S3-EVO, \n * from 22.3-EVO before 22.3R3-S2-EVO, \n * from 22.4-EVO before 22.4R3-EVO, \n * from 23.2-EVO before 23.2R2-EVO.\n\n\n\nVersions of Junos OS before 21.1R1 are unaffected by this vulnerability.\nVersions of Junos OS Evolved before 21.1R1-EVO are unaffected by this vulnerability.", "affected": [ { "vendor": "Juniper Networks", "product": "Junos OS", "defaultStatus": "unaffected", "versions": [ { "version": "21.1", "status": "affected", "versionType": "semver", "lessThan": "21.1*" }, { "version": "21.2", "status": "affected", "versionType": "semver", "lessThan": "21.2R3-S7" }, { "version": "21.4", "status": "affected", "versionType": "semver", "lessThan": "21.4R3-S6" }, { "version": "22.1", "status": "affected", "versionType": "semver", "lessThan": "22.1R3-S5" }, { "version": "22.2", "status": "affected", "versionType": "semver", "lessThan": "22.2R3-S3" }, { "version": "22.3", "status": "affected", "versionType": "semver", "lessThan": "22.3R3-S2" }, { "version": "22.4", "status": "affected", "versionType": "semver", "lessThan": "22.4R3" }, { "version": "23.2", "status": "affected", "versionType": "semver", "lessThan": "23.2R2" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "21.1R1" } ] }, { "vendor": "Juniper Networks", "product": "Junos OS Evolved", "defaultStatus": "unaffected", "versions": [ { "version": "21.1-EVO", "status": "affected", "versionType": "semver", "lessThan": "21.1*-EVO" }, { "version": "21.2-EVO", "status": "affected", "versionType": "semver", "lessThan": "21.2*-EVO" }, { "version": "21.4-EVO", "status": "affected", "versionType": "semver", "lessThan": "21.4R3-S6-EVO" }, { "version": "22.1-EVO", "status": "affected", "versionType": "semver", "lessThan": "22.1R3-S5-EVO" }, { "version": "22.2-EVO", "status": "affected", "versionType": "semver", "lessThan": "22.2R3-S3-EVO" }, { "version": "22.3-EVO", "status": "affected", "versionType": "semver", "lessThan": "22.3R3-S2-EVO" }, { "version": "22.4-EVO", "status": "affected", "versionType": "semver", "lessThan": "22.4R3-EVO" }, { "version": "23.2-EVO", "status": "affected", "versionType": "semver", "lessThan": "23.2R2-EVO" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "21.1R1-EVO" } ] } ] } } }