CVE-2021-42534 (GCVE-0-2021-42534)
Vulnerability from cvelistv5 – Published: 2021-10-22 13:17 – Updated: 2024-09-16 23:52
VLAI
EPSS
VEX
Title
Trane Building Automation Controllers Cross-site Scripting
Summary
The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.
Severity
6.3 (Medium)
CWE
- CWE-79 - Cross-site Scripting (XSS)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02 | x_refsource_CONFIRM |
Impacted products
Date Public
2021-10-19 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T03:30:38.337Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Tracer SC",
"vendor": "Trane",
"versions": [
{
"lessThanOrEqual": "3.8",
"status": "affected",
"version": "All",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Chizuru Toyama of TXOne IoT/ICS Security Research Labs of Trend Micro reported this vulnerability to CISA."
}
],
"datePublic": "2021-10-19T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The affected product\u2019s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Cross-site Scripting (XSS)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-10-25T14:01:11.000Z",
"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"shortName": "icscert"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02"
}
],
"solutions": [
{
"lang": "en",
"value": "Trane has identified the following specific mitigations for the affected products:\n\nUsers upgrade Tracer SC controllers running firmware v3.8 and prior, to firmware v4.4 SP7 or higher. Users should contact a regional Trane office to install updated firmware or request additional information and reference Trane service database number HUB-207592.\nTracer SC is no longer actively developed, tested, or sold. Tracer SC will be considered end-of-life on December 31, 2022. Trane recommends users identify a migration plan to replace the Tracer SC controller with the Tracer SC+ controller, which can function as a drop-in replacement for Tracer SC, providing significant security upgrades."
}
],
"source": {
"advisory": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02",
"discovery": "UNKNOWN"
},
"title": "Trane Building Automation Controllers Cross-site Scripting",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "ics-cert@hq.dhs.gov",
"DATE_PUBLIC": "2021-10-19T15:34:00.000Z",
"ID": "CVE-2021-42534",
"STATE": "PUBLIC",
"TITLE": "Trane Building Automation Controllers Cross-site Scripting"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Tracer SC",
"version": {
"version_data": [
{
"version_affected": "\u003c=",
"version_name": "All",
"version_value": "3.8"
}
]
}
}
]
},
"vendor_name": "Trane"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Chizuru Toyama of TXOne IoT/ICS Security Research Labs of Trend Micro reported this vulnerability to CISA."
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The affected product\u2019s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-79 Cross-site Scripting (XSS)"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02",
"refsource": "CONFIRM",
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02"
}
]
},
"solution": [
{
"lang": "en",
"value": "Trane has identified the following specific mitigations for the affected products:\n\nUsers upgrade Tracer SC controllers running firmware v3.8 and prior, to firmware v4.4 SP7 or higher. Users should contact a regional Trane office to install updated firmware or request additional information and reference Trane service database number HUB-207592.\nTracer SC is no longer actively developed, tested, or sold. Tracer SC will be considered end-of-life on December 31, 2022. Trane recommends users identify a migration plan to replace the Tracer SC controller with the Tracer SC+ controller, which can function as a drop-in replacement for Tracer SC, providing significant security upgrades."
}
],
"source": {
"advisory": "https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
"assignerShortName": "icscert",
"cveId": "CVE-2021-42534",
"datePublished": "2021-10-22T13:17:15.735Z",
"dateReserved": "2021-10-15T00:00:00.000Z",
"dateUpdated": "2024-09-16T23:52:08.538Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-42534",
"date": "2026-09-15",
"epss": "0.00607",
"percentile": "0.47265"
},
"fkie_nvd": {
"configurations": "[{\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:trane:tracer_sc_firmware:*:*:*:*:*:*:*:*\", \"versionEndIncluding\": \"3.8\", \"matchCriteriaId\": \"92C018AE-5629-441A-BF3A-7C3C865EE020\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:trane:tracer_sc:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"C0514AF8-5E91-4068-A507-575E71EFB16A\"}]}]}]",
"descriptions": "[{\"lang\": \"en\", \"value\": \"The affected product\\u2019s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.\"}, {\"lang\": \"es\", \"value\": \"La aplicaci\\u00f3n web del producto afectado no neutraliza adecuadamente la entrada durante la generaci\\u00f3n de la p\\u00e1gina web, que podr\\u00eda permitir a un atacante inyectar c\\u00f3digo en los formularios de entrada\"}]",
"id": "CVE-2021-42534",
"lastModified": "2024-11-21T06:27:45.320",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"ics-cert@hq.dhs.gov\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\", \"baseScore\": 6.3, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"LOW\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 3.4}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\", \"baseScore\": 6.1, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"CHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 2.7}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:M/Au:N/C:N/I:P/A:N\", \"baseScore\": 4.3, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 8.6, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": true}]}",
"published": "2021-10-22T14:15:08.690",
"references": "[{\"url\": \"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02\", \"source\": \"ics-cert@hq.dhs.gov\", \"tags\": [\"Third Party Advisory\", \"US Government Resource\"]}, {\"url\": \"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"US Government Resource\"]}]",
"sourceIdentifier": "ics-cert@hq.dhs.gov",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"ics-cert@hq.dhs.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-79\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-42534\",\"sourceIdentifier\":\"ics-cert@hq.dhs.gov\",\"published\":\"2021-10-22T14:15:08.690\",\"lastModified\":\"2026-06-17T04:09:46.927\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The affected product\u2019s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.\"},{\"lang\":\"es\",\"value\":\"La aplicaci\u00f3n web del producto afectado no neutraliza adecuadamente la entrada durante la generaci\u00f3n de la p\u00e1gina web, que podr\u00eda permitir a un atacante inyectar c\u00f3digo en los formularios de entrada\"}],\"affected\":[{\"source\":\"ics-cert@hq.dhs.gov\",\"affectedData\":[{\"vendor\":\"Trane\",\"product\":\"Tracer SC\",\"versions\":[{\"version\":\"All\",\"lessThanOrEqual\":\"3.8\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"ics-cert@hq.dhs.gov\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\",\"baseScore\":6.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":3.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\",\"baseScore\":6.1,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":2.7}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:N/I:P/A:N\",\"baseScore\":4.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"ics-cert@hq.dhs.gov\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:trane:tracer_sc_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"3.8\",\"matchCriteriaId\":\"92C018AE-5629-441A-BF3A-7C3C865EE020\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:trane:tracer_sc:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C0514AF8-5E91-4068-A507-575E71EFB16A\"}]}]}],\"references\":[{\"url\":\"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02\",\"source\":\"ics-cert@hq.dhs.gov\",\"tags\":[\"Third Party Advisory\",\"US Government Resource\"]},{\"url\":\"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"US Government Resource\"]}]}}",
"redhat_vex": {
"current_release_date": "2026-03-27T13:26:21+00:00",
"cve": "CVE-2021-42534",
"id": "CVE-2021-42534",
"initial_release_date": "2021-10-19T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Trane Building Automation Controllers Cross-site Scripting",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-42534.json",
"version": "3"
}
}
}
Loading…
Loading…
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.
Loading…
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.
Loading…
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.
Loading…