USN-4658-1 (UBUNTU-CVE-2020-0423)
Vulnerability from osv_ubuntu – Published: 2020-12-03 23:07 – Updated: 2026-06-03 10:45 – Source website
VLAI
Summary
linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities
Details
It was discovered that a race condition existed in the binder IPC implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-0423)
Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proximate attacker could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135)
It was discovered that a race condition existed in the perf subsystem of the Linux kernel, leading to a use-after-free vulnerability. An attacker with access to the perf subsystem could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-14351)
It was discovered that the frame buffer implementation in the Linux kernel did not properly handle some edge cases in software scrollback. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-14390)
It was discovered that the netfilter connection tracker for netlink in the Linux kernel did not properly perform bounds checking in some situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-25211)
It was discovered that the Rados block device (rbd) driver in the Linux kernel did not properly perform privilege checks for access to rbd devices in some situations. A local attacker could use this to map or unmap rbd block devices. (CVE-2020-25284)
It was discovered that the HDLC PPP implementation in the Linux kernel did not properly validate input in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25643)
It was discovered that the GENEVE tunnel implementation in the Linux kernel when combined with IPSec did not properly select IP routes in some situations. An attacker could use this to expose sensitive information (unencrypted network traffic). (CVE-2020-25645)
Keyu Man discovered that the ICMP global rate limiter in the Linux kernel could be used to assist in scanning open UDP ports. A remote attacker could use to facilitate attacks on UDP based services that depend on source port randomization. (CVE-2020-25705)
It was discovered that the framebuffer implementation in the Linux kernel did not properly perform range checks in certain situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-28915)
It was discovered that Power 9 processors could be coerced to expose information from the L1 cache in certain situations. A local attacker could use this to expose sensitive information. (CVE-2020-4788)
References
{
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{
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{
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{
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"type": "CVSS_V3"
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},
{
"id": "CVE-2020-25211",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25284",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25643",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25645",
"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-2020-25705",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-28915",
"severity": [
{
"score": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "linux-buildinfo-5.4.0-1028-kvm",
"binary_version": "5.4.0-1028.29"
},
{
"binary_name": "linux-headers-5.4.0-1028-kvm",
"binary_version": "5.4.0-1028.29"
},
{
"binary_name": "linux-image-unsigned-5.4.0-1028-kvm",
"binary_version": "5.4.0-1028.29"
},
{
"binary_name": "linux-kvm-headers-5.4.0-1028",
"binary_version": "5.4.0-1028.29"
},
{
"binary_name": "linux-kvm-tools-5.4.0-1028",
"binary_version": "5.4.0-1028.29"
},
{
"binary_name": "linux-modules-5.4.0-1028-kvm",
"binary_version": "5.4.0-1028.29"
},
{
"binary_name": "linux-tools-5.4.0-1028-kvm",
"binary_version": "5.4.0-1028.29"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "linux-kvm",
"purl": "pkg:deb/ubuntu/linux-kvm@5.4.0-1028.29?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.4.0-1028.29"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.3.0-1003.3",
"5.3.0-1008.9",
"5.3.0-1009.10",
"5.4.0-1004.4",
"5.4.0-1006.6",
"5.4.0-1007.7",
"5.4.0-1008.8",
"5.4.0-1009.9",
"5.4.0-1011.11",
"5.4.0-1015.15",
"5.4.0-1018.18",
"5.4.0-1020.20",
"5.4.0-1021.21",
"5.4.0-1023.23",
"5.4.0-1024.24",
"5.4.0-1026.27"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-0423",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-4788",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-10135",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14351",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14390",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25211",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25284",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25643",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25645",
"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-2020-25705",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-28915",
"severity": [
{
"score": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "linux-buildinfo-5.4.0-1030-oracle",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-headers-5.4.0-1030-oracle",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-image-unsigned-5.4.0-1030-oracle",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-modules-5.4.0-1030-oracle",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-modules-extra-5.4.0-1030-oracle",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-oracle-headers-5.4.0-1030",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-oracle-tools-5.4.0-1030",
"binary_version": "5.4.0-1030.32"
},
{
"binary_name": "linux-tools-5.4.0-1030-oracle",
"binary_version": "5.4.0-1030.32"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "linux-oracle",
"purl": "pkg:deb/ubuntu/linux-oracle@5.4.0-1030.32?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.4.0-1030.32"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.3.0-1002.2",
"5.3.0-1007.8",
"5.3.0-1008.9",
"5.4.0-1005.5",
"5.4.0-1007.7",
"5.4.0-1008.8",
"5.4.0-1009.9",
"5.4.0-1011.11",
"5.4.0-1015.15",
"5.4.0-1018.18",
"5.4.0-1019.19",
"5.4.0-1021.21",
"5.4.0-1022.22",
"5.4.0-1024.24",
"5.4.0-1025.25",
"5.4.0-1028.29",
"5.4.0-1029.31"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-0423",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-4788",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-10135",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14351",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-14390",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25211",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25284",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25643",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-25645",
"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-2020-25705",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2020-28915",
"severity": [
{
"score": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "linux-buildinfo-5.4.0-1023-raspi",
"binary_version": "5.4.0-1023.26"
},
{
"binary_name": "linux-headers-5.4.0-1023-raspi",
"binary_version": "5.4.0-1023.26"
},
{
"binary_name": "linux-image-5.4.0-1023-raspi",
"binary_version": "5.4.0-1023.26"
},
{
"binary_name": "linux-modules-5.4.0-1023-raspi",
"binary_version": "5.4.0-1023.26"
},
{
"binary_name": "linux-raspi-headers-5.4.0-1023",
"binary_version": "5.4.0-1023.26"
},
{
"binary_name": "linux-raspi-tools-5.4.0-1023",
"binary_version": "5.4.0-1023.26"
},
{
"binary_name": "linux-tools-5.4.0-1023-raspi",
"binary_version": "5.4.0-1023.26"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "linux-raspi",
"purl": "pkg:deb/ubuntu/linux-raspi@5.4.0-1023.26?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.4.0-1023.26"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.4.0-1007.7",
"5.4.0-1008.8",
"5.4.0-1011.11",
"5.4.0-1012.12",
"5.4.0-1013.13",
"5.4.0-1015.15",
"5.4.0-1016.17",
"5.4.0-1018.20",
"5.4.0-1019.21",
"5.4.0-1021.24",
"5.4.0-1022.25"
]
}
],
"aliases": [],
"details": "It was discovered that a race condition existed in the binder IPC\nimplementation in the Linux kernel, leading to a use-after-free\nvulnerability. A local attacker could use this to cause a denial of service\n(system crash) or possibly execute arbitrary code. (CVE-2020-0423)\n\nDaniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered\nthat legacy pairing and secure-connections pairing authentication in the\nBluetooth protocol could allow an unauthenticated user to complete\nauthentication without pairing credentials via adjacent access. A\nphysically proximate attacker could use this to impersonate a previously\npaired Bluetooth device. (CVE-2020-10135)\n\nIt was discovered that a race condition existed in the perf subsystem of\nthe Linux kernel, leading to a use-after-free vulnerability. An attacker\nwith access to the perf subsystem could use this to cause a denial of\nservice (system crash) or possibly execute arbitrary code. (CVE-2020-14351)\n\nIt was discovered that the frame buffer implementation in the Linux kernel\ndid not properly handle some edge cases in software scrollback. A local\nattacker could use this to cause a denial of service (system crash) or\npossibly execute arbitrary code. (CVE-2020-14390)\n\nIt was discovered that the netfilter connection tracker for netlink in the\nLinux kernel did not properly perform bounds checking in some situations. A\nlocal attacker could use this to cause a denial of service (system crash).\n(CVE-2020-25211)\n\nIt was discovered that the Rados block device (rbd) driver in the Linux\nkernel did not properly perform privilege checks for access to rbd devices\nin some situations. A local attacker could use this to map or unmap rbd\nblock devices. (CVE-2020-25284)\n\nIt was discovered that the HDLC PPP implementation in the Linux kernel did\nnot properly validate input in some situations. A local attacker could use\nthis to cause a denial of service (system crash) or possibly execute\narbitrary code. (CVE-2020-25643)\n\nIt was discovered that the GENEVE tunnel implementation in the Linux kernel\nwhen combined with IPSec did not properly select IP routes in some\nsituations. An attacker could use this to expose sensitive information\n(unencrypted network traffic). (CVE-2020-25645)\n\nKeyu Man discovered that the ICMP global rate limiter in the Linux kernel\ncould be used to assist in scanning open UDP ports. A remote attacker could\nuse to facilitate attacks on UDP based services that depend on source port\nrandomization. (CVE-2020-25705)\n\nIt was discovered that the framebuffer implementation in the Linux kernel\ndid not properly perform range checks in certain situations. A local\nattacker could use this to expose sensitive information (kernel memory).\n(CVE-2020-28915)\n\nIt was discovered that Power 9 processors could be coerced to expose\ninformation from the L1 cache in certain situations. A local attacker could\nuse this to expose sensitive information. (CVE-2020-4788)\n",
"id": "USN-4658-1",
"modified": "2026-06-03T10:45:23Z",
"published": "2020-12-03T23:07:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4658-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-0423"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-4788"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-10135"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14351"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-14390"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25211"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25284"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25643"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25645"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-25705"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-28915"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerabilities",
"upstream": [
"UBUNTU-CVE-2020-0423",
"UBUNTU-CVE-2020-4788",
"UBUNTU-CVE-2020-10135",
"UBUNTU-CVE-2020-14351",
"UBUNTU-CVE-2020-14390",
"UBUNTU-CVE-2020-25211",
"UBUNTU-CVE-2020-25284",
"UBUNTU-CVE-2020-25643",
"UBUNTU-CVE-2020-25645",
"UBUNTU-CVE-2020-25705",
"UBUNTU-CVE-2020-28915"
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.