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{
"CVE_data_meta": {
Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information. Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information.
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"ASSIGNER": "sirt@juniper.net",
"DATE_PUBLIC": "2021-04-14T16:00:00.000Z",
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"ID": "CVE-2021-0216",
Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information. Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information.
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"STATE": "PUBLIC",
"TITLE": "Junos OS: ACX5448, ACX710: BFD sessions might flap due to high rate of transit ARP packets"
"-Synchronized-Data."
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},
Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information. Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information.
2021-04-22 13:31:05 -06:00
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Junos OS",
"version": {
"version_data": [
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "18.2",
"version_value": "18.2R3-S8"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "18.3",
"version_value": "18.3R3-S5"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "18.4",
"version_value": "18.4R1-S6, 18.4R3-S7"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "19.1",
"version_value": "19.1R3-S5"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "19.2",
"version_value": "19.2R2, 19.2R3"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "19.3",
"version_value": "19.3R3"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "19.4",
"version_value": "19.4R3"
},
{
"platform": "ACX5448",
"version_affected": "<",
"version_name": "20.1",
"version_value": "20.1R2"
},
{
"platform": "ACX5448, ACX710",
"version_affected": "<",
"version_name": "20.2",
"version_value": "20.2R2"
}
]
}
}
]
},
"vendor_name": "Juniper Networks"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
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"description": {
"description_data": [
{
"lang": "eng",
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"value": "A vulnerability in Juniper Networks Junos OS running on the ACX5448 and ACX710 platforms may cause BFD sessions to flap when a high rate of transit ARP packets are received. This, in turn, may impact routing protocols and network stability, leading to a Denial of Service (DoS) condition. When a high rate of transit ARP packets are exceptioned to the CPU and BFD flaps, the following log messages may be seen: bfdd[15864]: BFDD_STATE_UP_TO_DOWN: BFD Session 192.168.14.3 (IFL 232) state Up -> Down LD/RD(17/19) Up time:11:38:17 Local diag: CtlExpire Remote diag: None Reason: Detect Timer Expiry. bfdd[15864]: BFDD_TRAP_SHOP_STATE_DOWN: local discriminator: 17, new state: down, interface: irb.998, peer addr: 192.168.14.3 rpd[15839]: RPD_ISIS_ADJDOWN: IS-IS lost L2 adjacency to peer on irb.998, reason: BFD Session Down bfdd[15864]: BFDD_TRAP_SHOP_STATE_UP: local discriminator: 17, new state: up, interface: irb.998, peer addr: 192.168.14.3 This issue only affects the ACX5448 Series and ACX710 Series routers. No other products or platforms are affected by this vulnerability. This issue affects Juniper Networks Junos OS: 18.2 versions prior to 18.2R3-S8 on ACX5448; 18.3 versions prior to 18.3R3-S5 on ACX5448; 18.4 versions prior to 18.4R1-S6, 18.4R3-S7 on ACX5448; 19.1 versions prior to 19.1R3-S5 on ACX5448; 19.2 versions prior to 19.2R2, 19.2R3 on ACX5448; 19.3 versions prior to 19.3R3 on ACX5448; 19.4 versions prior to 19.4R3 on ACX5448; 20.1 versions prior to 20.1R2 on ACX5448; 20.2 versions prior to 20.2R2 on ACX5448 and ACX710."
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}
]
Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information. Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information.
2021-04-22 13:31:05 -06:00
},
"exploit": [
{
"lang": "eng",
"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
}
],
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "Denial of Service"
}
]
}
]
},
"references": {
"reference_data": [
{
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"refsource": "MISC",
"url": "https://kb.juniper.net/JSA11118",
"name": "https://kb.juniper.net/JSA11118"
Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information. Juniper JSA publication 2021-04. See https://advisory.juniper.net for more information.
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}
]
},
"solution": [
{
"lang": "eng",
"value": "The following software releases have been updated to resolve this specific issue: Junos OS 18.2R3-S8, 18.3R3-S5, 18.4R1-S6, 18.4R3-S7, 19.1R3-S5, 19.2R2, 19.2R3, 19.3R3, 19.4R3, 20.1R2, 20.2R2, 20.3R1, and all subsequent releases."
}
],
"source": {
"advisory": "JSA11118",
"defect": [
"1477261"
],
"discovery": "USER"
},
"work_around": [
{
"lang": "eng",
"value": "There are no viable workarounds for this issue."
}
]
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}
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