CVE-2021-41039 (GCVE-0-2021-41039)
Vulnerability from cvelistv5 – Published: 2021-12-01 00:00 – Updated: 2024-08-04 02:59
VLAI
EPSS
VEX
Summary
In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.
Severity
7.5 (High)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314 | |
| https://www.debian.org/security/2023/dsa-5511 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| The Eclipse Foundation | Eclipse Mosquitto |
Affected:
1.6 , < unspecified
(custom)
Affected: unspecified , ≤ 2.0.11 (custom) |
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T02:59:31.087Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_transferred"
],
"url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314"
},
{
"name": "DSA-5511",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://www.debian.org/security/2023/dsa-5511"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "Eclipse Mosquitto",
"vendor": "The Eclipse Foundation",
"versions": [
{
"lessThan": "unspecified",
"status": "affected",
"version": "1.6",
"versionType": "custom"
},
{
"lessThanOrEqual": "2.0.11",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "This issue was discovered and reported by Zhanxiang Song, Bin Yuan, DeQing Zou, Hai Jin, Huazhong Univ. of Sci. \u0026 Tech.; Luyi Xing, IU; Yan Jia, Nankai University"
}
],
"descriptions": [
{
"lang": "en",
"value": "In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1050",
"description": "CWE-1050",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-10-02T11:06:32.203Z",
"orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
"shortName": "eclipse"
},
"references": [
{
"url": "https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314"
},
{
"name": "DSA-5511",
"tags": [
"vendor-advisory"
],
"url": "https://www.debian.org/security/2023/dsa-5511"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
"assignerShortName": "eclipse",
"cveId": "CVE-2021-41039",
"datePublished": "2021-12-01T00:00:00.000Z",
"dateReserved": "2021-09-13T00:00:00.000Z",
"dateUpdated": "2024-08-04T02:59:31.087Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-41039",
"date": "2026-09-15",
"epss": "0.0126",
"percentile": "0.68017"
},
"fkie_nvd": {
"configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"1.6\", \"versionEndIncluding\": \"2.0.11\", \"matchCriteriaId\": \"24B5FA32-61CC-4331-B08A-134960167D63\"}]}]}]",
"descriptions": "[{\"lang\": \"en\", \"value\": \"In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.\"}, {\"lang\": \"es\", \"value\": \"En las versiones 1.6 a 2.0.11 de Eclipse Mosquitto, un cliente MQTT v5 que se conecte con un gran n\\u00famero de propiedades de usuario podr\\u00eda causar un uso excesivo de la CPU, conllevando a una p\\u00e9rdida de rendimiento y una posible denegaci\\u00f3n de servicio\"}]",
"id": "CVE-2021-41039",
"lastModified": "2024-11-21T06:25:20.313",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:N/A:P\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
"published": "2021-12-01T20:15:07.933",
"references": "[{\"url\": \"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314\", \"source\": \"emo@eclipse.org\", \"tags\": [\"Exploit\", \"Issue Tracking\", \"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.debian.org/security/2023/dsa-5511\", \"source\": \"emo@eclipse.org\"}, {\"url\": \"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Exploit\", \"Issue Tracking\", \"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.debian.org/security/2023/dsa-5511\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
"sourceIdentifier": "emo@eclipse.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"emo@eclipse.org\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-1050\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-Other\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-41039\",\"sourceIdentifier\":\"emo@eclipse.org\",\"published\":\"2021-12-01T20:15:07.933\",\"lastModified\":\"2026-06-17T04:07:47.517\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service.\"},{\"lang\":\"es\",\"value\":\"En las versiones 1.6 a 2.0.11 de Eclipse Mosquitto, un cliente MQTT v5 que se conecte con un gran n\u00famero de propiedades de usuario podr\u00eda causar un uso excesivo de la CPU, conllevando a una p\u00e9rdida de rendimiento y una posible denegaci\u00f3n de servicio\"}],\"affected\":[{\"source\":\"emo@eclipse.org\",\"affectedData\":[{\"vendor\":\"The Eclipse Foundation\",\"product\":\"Eclipse Mosquitto\",\"versions\":[{\"version\":\"1.6\",\"lessThan\":\"unspecified\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"unspecified\",\"lessThanOrEqual\":\"2.0.11\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"emo@eclipse.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1050\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:eclipse:mosquitto:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.6\",\"versionEndIncluding\":\"2.0.11\",\"matchCriteriaId\":\"24B5FA32-61CC-4331-B08A-134960167D63\"}]}]}],\"references\":[{\"url\":\"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314\",\"source\":\"emo@eclipse.org\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.debian.org/security/2023/dsa-5511\",\"source\":\"emo@eclipse.org\"},{\"url\":\"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.debian.org/security/2023/dsa-5511\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
"redhat_vex": {
"current_release_date": "2025-11-21T15:31:09+00:00",
"cve": "CVE-2021-41039",
"id": "CVE-2021-41039",
"initial_release_date": "2021-12-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "mosquitto: DoS via malicious client",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-41039.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2025-02-17T05:09:54Z",
"cve": "CVE-2021-41039",
"id": "CVE-2021-41039",
"initial_release_date": "2023-02-15T03:37:49Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-41039",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-41039.json",
"version": "5"
}
}
}
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…