GSD-2021-0267
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-0267",
"description": "An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD\u0027s DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.",
"id": "GSD-2021-0267"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-0267"
],
"details": "An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD\u0027s DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.",
"id": "GSD-2021-0267",
"modified": "2023-12-13T01:23:07.560978Z",
"schema_version": "1.4.0"
}
},
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"ASSIGNER": "sirt@juniper.net",
"DATE_PUBLIC": "2021-04-14T16:00:00.000Z",
"ID": "CVE-2021-0267",
"STATE": "PUBLIC",
"TITLE": "Junos OS: Receipt of a crafted DHCP packet will cause the jdhcpd DHCP service to core."
},
"affects": {
"vendor": {
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"product": {
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"product_name": "Junos OS",
"version": {
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"configuration": [
{
"lang": "eng",
"value": "This issue requires active-lease query with none or greater optional settings to be configured in one or more hierarchy locations.\n\n active-leasequery {\n idle-timeout \"seconds\"; (optional)\n peer-address \"address\"; (optional)\n timeout \"seconds\"; (optional)\n topology-discover; (optional)\n }\n\nwith\n\n [forwarding-options dhcp-relay],\n [forwarding-options dhcp-relay dhcpv6],\n [logical-systems logical-system-name ...],\n [logical-systems logical-system-name routing-instances routing-instance-name ...],\n [routing-instances routing-instance-name ...]\n\n"
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"value": "An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD\u0027s DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved."
}
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"exploit": [
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"lang": "eng",
"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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"generator": {
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"impact": {
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"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
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"refsource": "MISC",
"url": "https://kb.juniper.net/JSA11158"
},
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"name": "https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html",
"refsource": "MISC",
"url": "https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessions/topics/ref/statement/active-leasequery-edit-forwarding-options.html"
}
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"solution": [
{
"lang": "eng",
"value": "The following software releases have been updated to resolve this specific issue: \nJunos OS: 19.4R3-S1, 20.1R2-S1, 20.1R3, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases.\n\n"
}
],
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"defect": [
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],
"discovery": "USER"
},
"work_around": [
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"lang": "eng",
"value": "There are no viable workarounds for this issue."
}
]
},
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"lastModifiedDate": "2021-07-23T19:10Z",
"publishedDate": "2021-04-22T20:15Z"
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}
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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