CVE-2021-30720 (GCVE-0-2021-30720)
Vulnerability from cvelistv5 – Published: 2021-09-08 13:41 – Updated: 2024-08-03 22:40
VLAI
EPSS
VEX
Summary
A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious website may be able to access restricted ports on arbitrary servers.
Severity
5.4 (Medium)
CWE
- A malicious website may be able to access restricted ports on arbitrary servers
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://support.apple.com/en-us/HT212528 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212529 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212532 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212533 | x_refsource_MISC |
| https://support.apple.com/en-us/HT212534 | x_refsource_MISC |
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apple | iOS and iPadOS |
Affected:
unspecified , < 14.6
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 11.4
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 14.6
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 7.5
(custom)
|
guessed | |
| Apple | macOS |
Affected:
unspecified , < 14.1
(custom)
|
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T22:40:31.948Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT212528"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT212529"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT212532"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT212533"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://support.apple.com/en-us/HT212534"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "iOS and iPadOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "14.6",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "11.4",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "14.6",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "7.5",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "14.1",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious website may be able to access restricted ports on arbitrary servers."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "A malicious website may be able to access restricted ports on arbitrary servers",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-09-08T13:41:08.000Z",
"orgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"shortName": "apple"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT212528"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT212529"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT212532"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT212533"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://support.apple.com/en-us/HT212534"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "product-security@apple.com",
"ID": "CVE-2021-30720",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "iOS and iPadOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "14.6"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "11.4"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "14.6"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "7.5"
}
]
}
},
{
"product_name": "macOS",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_value": "14.1"
}
]
}
}
]
},
"vendor_name": "Apple"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious website may be able to access restricted ports on arbitrary servers."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "A malicious website may be able to access restricted ports on arbitrary servers"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://support.apple.com/en-us/HT212528",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT212528"
},
{
"name": "https://support.apple.com/en-us/HT212529",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT212529"
},
{
"name": "https://support.apple.com/en-us/HT212532",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT212532"
},
{
"name": "https://support.apple.com/en-us/HT212533",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT212533"
},
{
"name": "https://support.apple.com/en-us/HT212534",
"refsource": "MISC",
"url": "https://support.apple.com/en-us/HT212534"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c",
"assignerShortName": "apple",
"cveId": "CVE-2021-30720",
"datePublished": "2021-09-08T13:41:08.000Z",
"dateReserved": "2021-04-13T00:00:00.000Z",
"dateUpdated": "2024-08-03T22:40:31.948Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-30720",
"date": "2026-09-15",
"epss": "0.01372",
"percentile": "0.70451"
},
"fkie_nvd": {
"configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"14.1.1\", \"matchCriteriaId\": \"FFDA8CE0-8F2C-4FA7-91F8-A720F56EBC5D\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"14.6\", \"matchCriteriaId\": \"168B0313-B7B6-4CD5-AD4F-C133050498BF\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"14.6\", \"matchCriteriaId\": \"E1BB03E7-7DC3-404B-AD37-78849BE46420\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"11.0.1\", \"versionEndExcluding\": \"11.4\", \"matchCriteriaId\": \"391D9971-3C67-4B94-9AF2-1D4D23DAF95F\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"14.6\", \"matchCriteriaId\": \"9076D8C8-70CD-4DE5-8BAE-8CA6A5BEDDB3\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"7.5\", \"matchCriteriaId\": \"DD3B375C-0996-4A6E-AB14-D8A7561F1DFC\"}]}]}]",
"descriptions": "[{\"lang\": \"en\", \"value\": \"A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious website may be able to access restricted ports on arbitrary servers.\"}, {\"lang\": \"es\", \"value\": \"Se abord\\u00f3 un problema l\\u00f3gico con restricciones mejoradas. Este problema se corrigi\\u00f3 en tvOS versi\\u00f3n 14.6, iOS versi\\u00f3n 14.6 e iPadOS versi\\u00f3n 14.6, Safari versi\\u00f3n 14.1.1, macOS Big Sur versi\\u00f3n 11.4, watchOS versi\\u00f3n 7.5. Un sitio web malicioso podr\\u00eda acceder a puertos restringidos en servidores arbitrarios\"}]",
"id": "CVE-2021-30720",
"lastModified": "2024-11-21T06:04:31.090",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N\", \"baseScore\": 5.4, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"LOW\", \"integrityImpact\": \"LOW\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 2.5}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:M/Au:N/C:P/I:P/A:N\", \"baseScore\": 5.8, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"PARTIAL\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 8.6, \"impactScore\": 4.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": true}]}",
"published": "2021-09-08T14:15:08.600",
"references": "[{\"url\": \"https://support.apple.com/en-us/HT212528\", \"source\": \"product-security@apple.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212529\", \"source\": \"product-security@apple.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212532\", \"source\": \"product-security@apple.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212533\", \"source\": \"product-security@apple.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212534\", \"source\": \"product-security@apple.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212528\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212529\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212532\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212533\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://support.apple.com/en-us/HT212534\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
"sourceIdentifier": "product-security@apple.com",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-287\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2021-30720\",\"sourceIdentifier\":\"product-security@apple.com\",\"published\":\"2021-09-08T14:15:08.600\",\"lastModified\":\"2024-11-21T06:04:31.090\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A logic issue was addressed with improved restrictions. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Safari 14.1.1, macOS Big Sur 11.4, watchOS 7.5. A malicious website may be able to access restricted ports on arbitrary servers.\"},{\"lang\":\"es\",\"value\":\"Se abord\u00f3 un problema l\u00f3gico con restricciones mejoradas. Este problema se corrigi\u00f3 en tvOS versi\u00f3n 14.6, iOS versi\u00f3n 14.6 e iPadOS versi\u00f3n 14.6, Safari versi\u00f3n 14.1.1, macOS Big Sur versi\u00f3n 11.4, watchOS versi\u00f3n 7.5. Un sitio web malicioso podr\u00eda acceder a puertos restringidos en servidores arbitrarios\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":2.5}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:P/I:P/A:N\",\"baseScore\":5.8,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"14.1.1\",\"matchCriteriaId\":\"FFDA8CE0-8F2C-4FA7-91F8-A720F56EBC5D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"14.6\",\"matchCriteriaId\":\"168B0313-B7B6-4CD5-AD4F-C133050498BF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"14.6\",\"matchCriteriaId\":\"E1BB03E7-7DC3-404B-AD37-78849BE46420\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"11.0.1\",\"versionEndExcluding\":\"11.4\",\"matchCriteriaId\":\"391D9971-3C67-4B94-9AF2-1D4D23DAF95F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"14.6\",\"matchCriteriaId\":\"9076D8C8-70CD-4DE5-8BAE-8CA6A5BEDDB3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"7.5\",\"matchCriteriaId\":\"DD3B375C-0996-4A6E-AB14-D8A7561F1DFC\"}]}]}],\"references\":[{\"url\":\"https://support.apple.com/en-us/HT212528\",\"source\":\"product-security@apple.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212529\",\"source\":\"product-security@apple.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212532\",\"source\":\"product-security@apple.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212533\",\"source\":\"product-security@apple.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212534\",\"source\":\"product-security@apple.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212528\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212529\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212532\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212533\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://support.apple.com/en-us/HT212534\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T16:06:04+00:00",
"cve": "CVE-2021-30720",
"id": "CVE-2021-30720",
"initial_release_date": "2021-07-28T00:00:00+00:00",
"product_status:fixed": "70",
"product_status:known_affected": "9",
"product_status:known_not_affected": "436",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "webkitgtk: Logic issue allowing access to restricted ports on arbitrary servers",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-30720.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-13T23:57:53Z",
"cve": "CVE-2021-30720",
"id": "CVE-2021-30720",
"initial_release_date": "2023-02-15T03:41:41Z",
"product_status:known_affected": "1",
"product_status:known_not_affected": "117",
"product_status:recommended": "1048",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2021-30720",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-30720.json",
"version": "20"
}
}
}
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…