CVE-2021-31884 (GCVE-0-2021-31884)
Vulnerability from cvelistv5 – Published: 2021-11-09 11:31 – Updated: 2024-08-03 23:10
VLAI
EPSS
VEX
Summary
A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Capital VSTAR (All versions with enabled Ethernet options), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). The DHCP client application assumes that the data supplied with the “Hostname” DHCP option is NULL terminated. In cases when global hostname variable is not defined, this may lead to Out-of-bound reads, writes, and Denial-of-service conditions. (FSMD-2021-0014)
Severity
9.8 (Critical)
CWE
- CWE-170 - Improper Null Termination
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_MISC |
Impacted products
27 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Siemens | APOGEE MBC (PPC) (BACnet) |
Affected:
All versions
|
guessed | |
| Siemens | APOGEE MBC (PPC) (P2 Ethernet) |
Affected:
All versions
|
guessed | |
| Siemens | APOGEE MEC (PPC) (BACnet) |
Affected:
All versions
|
guessed | |
| Siemens | APOGEE MEC (PPC) (P2 Ethernet) |
Affected:
All versions
|
guessed | |
| Siemens | APOGEE PXC Compact (BACnet) |
Affected:
All versions < V3.5.4
|
guessed | |
| Siemens | APOGEE PXC Compact (P2 Ethernet) |
Affected:
All versions < V2.8.19
|
guessed | |
| Siemens | APOGEE PXC Modular (BACnet) |
Affected:
All versions < V3.5.4
|
guessed | |
| Siemens | APOGEE PXC Modular (P2 Ethernet) |
Affected:
All versions < V2.8.19
|
guessed | |
| Siemens | Capital VSTAR |
Affected:
All versions with enabled Ethernet options
|
guessed | |
| Siemens | Desigo PXC00-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC00-U |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC001-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC100-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC12-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC128-U |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC200-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC22-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC22.1-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC36.1-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC50-E.D |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXC64-U |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Desigo PXM20-E |
Affected:
All versions >= V2.3 and < V6.30.016
|
guessed | |
| Siemens | Nucleus NET |
Affected:
All versions
|
guessed | |
| Siemens | Nucleus ReadyStart V3 |
Affected:
All versions < V2017.02.4
|
guessed | |
| Siemens | Nucleus Source Code |
Affected:
All versions
|
guessed | |
| Siemens | TALON TC Compact (BACnet) |
Affected:
All versions < V3.5.4
|
guessed | |
| Siemens | TALON TC Modular (BACnet) |
Affected:
All versions < V3.5.4
|
guessed |
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"vendor": "Siemens",
"versions": [
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"product": "Desigo PXC100-E.D",
"vendor": "Siemens",
"versions": [
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"product": "Desigo PXC12-E.D",
"vendor": "Siemens",
"versions": [
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{
"product": "Desigo PXC128-U",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions \u003e= V2.3 and \u003c V6.30.016"
}
]
},
{
"product": "Desigo PXC200-E.D",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions \u003e= V2.3 and \u003c V6.30.016"
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},
{
"product": "Desigo PXC22-E.D",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions \u003e= V2.3 and \u003c V6.30.016"
}
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},
{
"product": "Desigo PXC22.1-E.D",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
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{
"product": "Desigo PXC36.1-E.D",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
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"product": "Desigo PXC50-E.D",
"vendor": "Siemens",
"versions": [
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"vendor": "Siemens",
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"status": "affected",
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"vendor": "Siemens",
"versions": [
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"status": "affected",
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{
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"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions"
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},
{
"product": "Nucleus ReadyStart V3",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions \u003c V2017.02.4"
}
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"product": "Nucleus Source Code",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
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{
"product": "TALON TC Compact (BACnet)",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions \u003c V3.5.4"
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},
{
"product": "TALON TC Modular (BACnet)",
"vendor": "Siemens",
"versions": [
{
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"product_name": "Desigo PXC100-E.D",
"version": {
"version_data": [
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"version_value": "All versions \u003e= V2.3 and \u003c V6.30.016"
}
]
}
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{
"product_name": "Desigo PXC12-E.D",
"version": {
"version_data": [
{
"version_value": "All versions \u003e= V2.3 and \u003c V6.30.016"
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]
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{
"product_name": "Desigo PXC128-U",
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]
}
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"product_name": "Desigo PXC200-E.D",
"version": {
"version_data": [
{
"version_value": "All versions \u003e= V2.3 and \u003c V6.30.016"
}
]
}
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{
"product_name": "Desigo PXC22-E.D",
"version": {
"version_data": [
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"version_value": "All versions \u003e= V2.3 and \u003c V6.30.016"
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}
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{
"product_name": "Desigo PXC22.1-E.D",
"version": {
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{
"product_name": "Desigo PXC36.1-E.D",
"version": {
"version_data": [
{
"version_value": "All versions \u003e= V2.3 and \u003c V6.30.016"
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]
}
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"product_name": "Desigo PXC50-E.D",
"version": {
"version_data": [
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"product_name": "Desigo PXC64-U",
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{
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"version_data": [
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"version_value": "All versions \u003c V2017.02.4"
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"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf",
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"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf",
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"value": "A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions \u003c V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions \u003c V2.8.19), APOGEE PXC Modular (BACnet) (All versions \u003c V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions \u003c V2.8.19), Capital VSTAR (All versions with enabled Ethernet options), Desigo PXC00-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC00-U (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC001-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC100-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC12-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC128-U (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC200-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC22-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC22.1-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC36.1-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC50-E.D (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXC64-U (All versions \u003e= V2.3 and \u003c V6.30.016), Desigo PXM20-E (All versions \u003e= V2.3 and \u003c V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions \u003c V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions \u003c V3.5.4), TALON TC Modular (BACnet) (All versions \u003c V3.5.4). The DHCP client application assumes that the data supplied with the \u201cHostname\u201d DHCP option is NULL terminated. In cases when global hostname variable is not defined, this may lead to Out-of-bound reads, writes, and Denial-of-service conditions. (FSMD-2021-0014)"
},
{
"lang": "es",
"value": "Se ha identificado una vulnerabilidad en APOGEE MBC (PPC) (BACnet) (Todas las versiones), APOGEE MBC (PPC) (P2 Ethernet) (Todas las versiones), APOGEE MEC (PPC) (BACnet) (Todas las versiones), APOGEE MEC (PPC) (P2 Ethernet) (Todas las versiones), APOGEE PXC Compact (BACnet) (Todas las versiones anteriores a V3. 5.4), APOGEE PXC Compact (P2 Ethernet) (Todas las versiones anteriores a V2.8.19), APOGEE PXC Modular (BACnet) (Todas las versiones anteriores a V3. 5.4), APOGEE PXC Modular (P2 Ethernet) (Todas las versiones anteriores a V2.8.19), Capital VSTAR (Todas las versiones con opciones de Ethernet habilitadas), Desigo PXC00-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6. 30.016), Desigo PXC00-U (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC001-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC100-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30. 016), Desigo PXC12-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC128-U (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC200-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC22-E. D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC22.1-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC36.1-E.D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC50-E. D (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXC64-U (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30.016), Desigo PXM20-E (Todas las versiones posteriores o iguales a V2.3 y anteriores a V6.30. 016), Nucleus NET (Todas las versiones), Nucleus ReadyStart V3 (Todas las versiones anteriores a V2017.02.4), Nucleus Source Code (Todas las versiones), TALON TC Compact (BACnet) (Todas las versiones anteriores a V3.5.4), TALON TC Modular (BACnet) (Todas las versiones anteriores a V3.5.4). La aplicaci\u00f3n cliente DHCP asume que los datos suministrados con la opci\u00f3n DHCP \"Hostname\" est\u00e1n terminados en NULL. En los casos en los que la variable global de nombre de host no est\u00e1 definida, esto puede llevar a lecturas y escrituras fuera de los l\u00edmites y a condiciones de denegaci\u00f3n de servicio. (FSMD-2021-0014)"
}
],
"id": "CVE-2021-31884",
"lastModified": "2024-11-21T06:06:25.570",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-11-09T12:15:09.437",
"references": [
{
"source": "productcert@siemens.com",
"tags": [
"Vendor Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf"
},
{
"source": "productcert@siemens.com",
"tags": [
"Vendor Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf"
},
{
"source": "productcert@siemens.com",
"tags": [
"Vendor Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf"
}
],
"sourceIdentifier": "productcert@siemens.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-170"
}
],
"source": "productcert@siemens.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T14:05:59+00:00",
"cve": "CVE-2021-31884",
"id": "CVE-2021-31884",
"initial_release_date": "2021-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2021-31884",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-31884.json",
"version": "3"
}
}
}
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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
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.