USN-4813-1 (UBUNTU-CVE-2018-11307)
Vulnerability from osv_ubuntu – Published: 2021-03-15 21:47 – Updated: 2026-06-25 10:45 – Source website
VLAI
Summary
jackson-databind vulnerabilities
Details
It was discovered that Jackson Databind incorrectly handled deserialization. An attacker could possibly use this issue to obtain sensitive information. (CVE-2018-11307, CVE-2019-12086, CVE-2019-12814)
It was discovered that Jackson Databind incorrectly handled deserialization. An attacker could possibly use this issue to execute arbitrary code or other unspecified impact. (CVE-2018-12022, CVE-2018-12023, CVE-2018-14718, CVE-2018-14719, CVE-2018-19360, CVE-2018-19361, CVE-2018-19362, CVE-2019-12384, CVE-2019-14379, CVE-2019-14439, CVE-2019-14540, CVE-2019-16335, CVE-2019-16942, CVE-2019-16943, CVE-2019-17267, CVE-2019-17531, CVE-2019-20330, CVE-2020-10672, CVE-2020-10673, CVE-2020-10968, CVE-2020-10969, CVE-2020-11111, CVE-2020-11112, CVE-2020-11113, CVE-2020-11619, CVE-2020-11620, CVE-2020-14060, CVE-2020-14061, CVE-2020-14062, CVE-2020-14195, CVE-2020-8840, CVE-2020-9546, CVE-2020-9547, CVE-2020-9548)
It was discovered that Jackson Databind incorrectly handled deserialization. An attacker could possibly use this issue to execute XML entity (XXE) attacks. (CVE-2018-14720)
It was discovered that Jackson Databind incorrectly handled deserialization. An attacker could possibly use this issue to execute server-side request forgery (SSRF). (CVE-2018-14721)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2018-11307",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-12022",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-12023",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-14718",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-14719",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-14720",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-14721",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-19360",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-19361",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-19362",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-12086",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-12384",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-12814",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-14379",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-14439",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-14540",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-16335",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-16942",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-16943",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-17267",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-17531",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2019-20330",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-8840",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-9546",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-9547",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-9548",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-10672",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-10673",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-10968",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-10969",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-11111",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-11112",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-11113",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-11619",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-11620",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14060",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14061",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14062",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14195",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libjackson2-databind-java",
"binary_version": "2.4.2-3ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "jackson-databind",
"purl": "pkg:deb/ubuntu/jackson-databind@2.4.2-3ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.2-3ubuntu0.1~esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.2-2",
"2.4.2-3",
"2.4.2-3ubuntu0.1~esm1"
]
}
],
"aliases": [],
"details": "It was discovered that Jackson Databind incorrectly handled\ndeserialization. An attacker could possibly use this issue to obtain\nsensitive information. (CVE-2018-11307, CVE-2019-12086, CVE-2019-12814)\n\nIt was discovered that Jackson Databind incorrectly handled\ndeserialization. An attacker could possibly use this issue to execute\narbitrary code or other unspecified impact. (CVE-2018-12022,\nCVE-2018-12023, CVE-2018-14718, CVE-2018-14719, CVE-2018-19360,\nCVE-2018-19361, CVE-2018-19362, CVE-2019-12384, CVE-2019-14379,\nCVE-2019-14439, CVE-2019-14540, CVE-2019-16335, CVE-2019-16942,\nCVE-2019-16943, CVE-2019-17267, CVE-2019-17531, CVE-2019-20330,\nCVE-2020-10672, CVE-2020-10673, CVE-2020-10968, CVE-2020-10969,\nCVE-2020-11111, CVE-2020-11112, CVE-2020-11113, CVE-2020-11619,\nCVE-2020-11620, CVE-2020-14060, CVE-2020-14061, CVE-2020-14062,\nCVE-2020-14195, CVE-2020-8840, CVE-2020-9546, CVE-2020-9547, CVE-2020-9548)\n\nIt was discovered that Jackson Databind incorrectly handled\ndeserialization. An attacker could possibly use this issue to execute XML\nentity (XXE) attacks. (CVE-2018-14720)\n\nIt was discovered that Jackson Databind incorrectly handled\ndeserialization. An attacker could possibly use this issue to execute\nserver-side request forgery (SSRF). (CVE-2018-14721)\n",
"id": "USN-4813-1",
"modified": "2026-06-25T10:45:59Z",
"published": "2021-03-15T21:47:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4813-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-11307"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-12022"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-12023"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-14718"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-14719"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-14720"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-14721"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-19360"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-19361"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-19362"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-12086"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-12384"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-12814"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-14379"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-14439"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-14540"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-16335"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-16942"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-16943"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-17267"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-17531"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-20330"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-8840"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-9546"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-9547"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-9548"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-10672"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-10673"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-10968"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-10969"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-11111"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-11112"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-11113"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-11619"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-11620"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14060"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14061"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14062"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14195"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "jackson-databind vulnerabilities",
"upstream": [
"UBUNTU-CVE-2018-11307",
"UBUNTU-CVE-2018-12022",
"UBUNTU-CVE-2018-12023",
"UBUNTU-CVE-2018-14718",
"UBUNTU-CVE-2018-14719",
"UBUNTU-CVE-2018-14720",
"UBUNTU-CVE-2018-14721",
"UBUNTU-CVE-2018-19360",
"UBUNTU-CVE-2018-19361",
"UBUNTU-CVE-2018-19362",
"UBUNTU-CVE-2019-12086",
"UBUNTU-CVE-2019-12384",
"UBUNTU-CVE-2019-12814",
"UBUNTU-CVE-2019-14379",
"UBUNTU-CVE-2019-14439",
"UBUNTU-CVE-2019-14540",
"UBUNTU-CVE-2019-16335",
"UBUNTU-CVE-2019-16942",
"UBUNTU-CVE-2019-16943",
"UBUNTU-CVE-2019-17267",
"UBUNTU-CVE-2019-17531",
"UBUNTU-CVE-2019-20330",
"UBUNTU-CVE-2020-8840",
"UBUNTU-CVE-2020-9546",
"UBUNTU-CVE-2020-9547",
"UBUNTU-CVE-2020-9548",
"UBUNTU-CVE-2020-10672",
"UBUNTU-CVE-2020-10673",
"UBUNTU-CVE-2020-10968",
"UBUNTU-CVE-2020-10969",
"UBUNTU-CVE-2020-11111",
"UBUNTU-CVE-2020-11112",
"UBUNTU-CVE-2020-11113",
"UBUNTU-CVE-2020-11619",
"UBUNTU-CVE-2020-11620",
"UBUNTU-CVE-2020-14060",
"UBUNTU-CVE-2020-14061",
"UBUNTU-CVE-2020-14062",
"UBUNTU-CVE-2020-14195"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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