{"id":"CVE-2024-47493","aliases":["EUVD-2024-42497","GHSA-fpxg-3hxf-5mvr"],"status":"published","title":"Junos OS: MX Series: Trio-based FPCs: Continuous physical Interface flaps causes local FPC to crash","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIn case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC  to eventually run out of memory and crash.  \n\nBelow CLI command can be used to check the memory usage over a period of time:\n\n  user@host\u003e show chassis fpc\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                Temp  CPU Utilization (%)   CPU Utilization (%)  Memory   \nUtilization (%)\n  Slot State      (C)  Total  Interrupt      1min   5min  \n15min DRAM (MB) Heap     Buffer\n\n  0 \nOnline       43     41         \n2                           2048       49         14\n\n  1 \nOnline       43     41         \n2                          \n2048       49         14\n\n  2 \nOnline       43     41         \n2                          \n2048       49         14\n\n\n\n\n\n\n\n\n\nThis issue affects Junos OS on MX Series: \n\n\n\n\n  *  All versions 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  *  from 23.4 before 23.4R2.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/U:Green","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0037,"percentile":0.31276,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-401"],"published":"2024-10-11T15:24:02Z","modified":"2026-06-17T07:57:10Z","products":[{"vendor":"juniper","product":"junos"},{"vendor":"juniper networks","product":"junos os"}],"references":[{"url":"https://supportportal.juniper.net/","tags":["vendor-advisory","Permissions Required"]},{"url":"https://www.juniper.net/documentation/us/en/software/junos/interfaces-link-multilink/topics/topic-map/link-multilink-services-understanding.html#id-multilink-interfaces-on-channelized-mics-overview","tags":["related","Technical Description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-47493"},{"url":"https://supportportal.juniper.net"},{"url":"https://github.com/advisories/GHSA-fpxg-3hxf-5mvr"}],"sources":{"cve":[{"id":"CVE-2024-47493","title":"Junos OS: MX Series: Trio-based FPCs: Continuous physical Interface flaps causes local FPC to crash","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIn case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC  to eventually run out of memory and crash.  \n\nBelow CLI command can be used to check the memory usage over a period of time:\n\n  user@host\u003e show chassis fpc\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                Temp  CPU Utilization (%)   CPU Utilization (%)  Memory   \nUtilization (%)\n  Slot State      (C)  Total  Interrupt      1min   5min  \n15min DRAM (MB) Heap     Buffer\n\n  0 \nOnline       43     41         \n2                           2048       49         14\n\n  1 \nOnline       43     41         \n2                          \n2048       49         14\n\n  2 \nOnline       43     41         \n2                          \n2048       49         14\n\n\n\n\n\n\n\n\n\nThis issue affects Junos OS on MX Series: \n\n\n\n\n  *  All versions 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  *  from 23.4 before 23.4R2.","status":"published","published":"2024-10-11T15:24:02.438Z","modified":"2024-11-08T17:17:27.242Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/U:Green","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:33:57.302325Z"}],"euvd":[{"id":"EUVD-2024-42497","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIn case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC  to eventually run out of memory and crash.  \n\nBelow CLI command can be used to check the memory usage over a period of time:\n\n  user@host\u003e show chassis fpc\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                Temp  CPU Utilization (%)   CPU Utilization (%)  Memory   \nUtilization (%)\n  Slot State      (C)  Total  Interrupt      1min   5min  \n15min DRAM (MB) Heap     Buffer\n\n  0 \nOnline       43     41         \n2                           2048       49         14\n\n  1 \nOnline       43     41         \n2                          \n2048       49         14\n\n  2 \nOnline       43     41         \n2                          \n2048       49         14\n\n\n\n\n\n\n\n\n\nThis issue affects Junos OS on MX Series: \n\n\n\n\n  *  All versions 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  *  from 23.4 before 23.4R2.","status":"published","published":"2024-10-11T15:24:02Z","modified":"2024-11-08T17:17:27Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/U:Green","level":"high"}],"updated_at":"2026-11-03T00:05:06.31936Z"}],"ghsa":[{"id":"GHSA-fpxg-3hxf-5mvr","title":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding...","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the SRX5K, SRX4600 and MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIn case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC  to eventually run out of memory and crash.  \n\nBelow CLI command can be used to check the memory usage over a period of time:\n\n  user@host\u003e show chassis fpc\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                Temp  CPU Utilization (%)   CPU Utilization (%)  Memory   \nUtilization (%)\n  Slot State      (C)  Total  Interrupt      1min   5min  \n15min DRAM (MB) Heap     Buffer\n\n  0 \nOnline       43     41         \n2                           2048       49         14\n\n  1 \nOnline       43     41         \n2                          \n2048       49         14\n\n  2 \nOnline       43     41         \n2                          \n2048       49         14\n\n\n\n\n\n\n\n\n\nThis issue affects Junos OS on SRX5K, SRX4600 and MX Series: \n\n\n\n\n  *  All versions 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  *  from 23.4 before 23.4R2.","status":"published","published":"2024-10-11T18:32:49Z","modified":"2024-10-11T18:32:56Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/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:Y/R:A/V:X/RE:X/U:Green","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:58:29.079883Z"}],"nvd":[{"id":"CVE-2024-47493","description":"A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIn case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC  to eventually run out of memory and crash.  \n\nBelow CLI command can be used to check the memory usage over a period of time:\n\n  user@host\u003e show chassis fpc\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                Temp  CPU Utilization (%)   CPU Utilization (%)  Memory   \nUtilization (%)\n  Slot State      (C)  Total  Interrupt      1min   5min  \n15min DRAM (MB) Heap     Buffer\n\n  0 \nOnline       43     41         \n2                           2048       49         14\n\n  1 \nOnline       43     41         \n2                          \n2048       49         14\n\n  2 \nOnline       43     41         \n2                          \n2048       49         14\n\n\n\n\n\n\n\n\n\nThis issue affects Junos OS on MX Series: \n\n\n\n\n  *  All versions 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  *  from 23.4 before 23.4R2.","status":"published","published":"2024-10-11T16:15:09.32Z","modified":"2026-06-17T07:57:10.513Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/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:Y/R:A/V:X/RE:X/U:Green","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:10:31.879321Z"}]}}