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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-2021-0228",
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: MX Series: DDoS LACP violation upon receipt of specific layer 2 frames in EVPN-VXLAN deployment"
"-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": "MX Series",
"version_affected": "<",
"version_name": "15.1",
"version_value": "15.1R7-S9"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "17.3",
"version_value": "17.3R3-S11"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "17.4",
"version_value": "17.4R3-S4"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "18.1",
"version_value": "18.1R3-S12"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "18.2",
"version_value": "18.2R2-S8, 18.2R3-S8"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "18.3",
"version_value": "18.3R3-S4"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "18.4",
"version_value": "18.4R1-S8, 18.4R2-S7, 18.4R3-S7"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "19.1",
"version_value": "19.1R3-S4"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "19.2",
"version_value": "19.2R1-S6"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "19.3",
"version_value": "19.3R3-S2"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "19.4",
"version_value": "19.4R2-S4, 19.4R3-S2"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "20.1",
"version_value": "20.1R2, 20.1R3"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "20.2",
"version_value": "20.2R2-S1, 20.2R3"
},
{
"platform": "MX Series",
"version_affected": "<",
"version_name": "20.3",
"version_value": "20.3R1-S1, 20.3R2"
}
]
}
}
]
},
"vendor_name": "Juniper Networks"
}
]
}
},
"configuration": [
{
"lang": "eng",
"value": "The DDoS feature is enabled by default, there is no specific config stanza required to enable DDoS protection.\n\nThe example of EVPN-VXLAN configuration stanza affected by this issue is as follows:\n[protocols evpn]\n[routing-instances <name> protocols evpn]"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
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"description": {
"description_data": [
{
"lang": "eng",
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"value": "An improper check for unusual or exceptional conditions vulnerability in Juniper Networks MX Series platforms with Trio-based MPC (Modular Port Concentrator) deployed in (Ethernet VPN) EVPN-(Virtual Extensible LAN) VXLAN configuration, may allow an attacker sending specific Layer 2 traffic to cause Distributed Denial of Service (DDoS) protection to trigger unexpectedly, resulting in traffic impact. Continued receipt and processing of this specific Layer 2 frames will sustain the Denial of Service (DoS) condition. An indication of compromise is to check DDOS LACP violations: user@device> show ddos-protection protocols statistics brief | match lacp This issue only affects the MX Series platforms with Trio-based MPC. No other products or platforms are affected. This issue affects: Juniper Networks Junos OS on MX Series: 15.1 versions prior to 15.1R7-S9; 17.3 versions prior to 17.3R3-S11; 17.4 versions prior to 17.4R3-S4; 18.1 versions prior to 18.1R3-S12; 18.2 versions prior to 18.2R2-S8, 18.2R3-S8; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R1-S8, 18.4R2-S7, 18.4R3-S7; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R1-S6; 19.3 versions prior to 19.3R3-S2; 19.4 versions prior to 19.4R2-S4, 19.4R3-S2; 20.1 versions prior to 20.1R2, 20.1R3; 20.2 versions prior to 20.2R2-S1, 20.2R3; 20.3 versions prior to 20.3R1-S1, 20.3R2;"
"-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.
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},
"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": "CWE-754 Improper Check for Unusual or Exceptional Conditions"
}
]
}
]
},
"references": {
"reference_data": [
{
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"refsource": "MISC",
"url": "https://kb.juniper.net/JSA11123",
"name": "https://kb.juniper.net/JSA11123"
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
}
]
},
"solution": [
{
"lang": "eng",
"value": "The following software releases have been updated to resolve this specific issue: 15.1R7-S9, 17.3R3-S11, 17.4R3-S4, 18.1R3-S12, 18.2R2-S8, 18.2R3-S8, 18.3R3-S4, 18.4R1-S8, 18.4R2-S7, 18.4R3-S7, 19.1R3-S4, 19.2R1-S6, 19.3R3-S2, 19.4R2-S4, 19.4R3-S2, 20.1R2, 20.1R3, 20.2R2-S1, 20.2R3, 20.3R1-S1, 20.3R2, 20.4R1, and all subsequent releases.\n"
}
],
"source": {
"advisory": "JSA11123",
"defect": [
"1512033"
],
"discovery": "USER"
},
"work_around": [
{
"lang": "eng",
"value": "DDoS for LACP can be disabled:\n\n set system ddos-protection protocols lacp aggregate disable-routing-engine\n set system ddos-protection protocols lacp aggregate disable-fpc\n"
}
]
"-Synchronized-Data."
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}
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