{"containers": {"cna": {"affected": [{"product": "iOS", "vendor": "Apple", "versions": [{"lessThan": "12.5", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.."}], "problemTypes": [{"descriptions": [{"description": "Processing maliciously crafted web content may lead to arbitrary code execution.\u00a0Apple is aware of a report that this issue may have been actively exploited.", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-09-08T14:25:25.000Z", "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212341"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "product-security@apple.com", "ID": "CVE-2021-30666", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "iOS", "version": {"version_data": [{"version_affected": "<", "version_value": "12.5"}]}}]}, "vendor_name": "Apple"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Processing maliciously crafted web content may lead to arbitrary code execution.\u00a0Apple is aware of a report that this issue may have been actively exploited."}]}]}, "references": {"reference_data": [{"name": "https://support.apple.com/en-us/HT212341", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212341"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:40:31.755Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212341"}]}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2021-30666", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-01-29T17:25:57.064117Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2021-11-03", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30666"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30666", "tags": ["government-resource"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-119", "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}], "timeline": [{"time": "2021-11-03T00:00:00+00:00", "lang": "en", "value": "CVE-2021-30666 added to CISA KEV"}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-21T23:25:34.810Z"}}]}, "cveMetadata": {"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "assignerShortName": "apple", "cveId": "CVE-2021-30666", "datePublished": "2021-09-08T14:25:25.000Z", "dateReserved": "2021-04-13T00:00:00.000Z", "dateUpdated": "2025-10-21T23:25:34.810Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"containers": {"cna": {"affected": [{"product": "iOS", "vendor": "Apple", "versions": [{"lessThan": "12.5", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.."}], "problemTypes": [{"descriptions": [{"description": "Processing maliciously crafted web content may lead to arbitrary code execution.\u00a0Apple is aware of a report that this issue may have been actively exploited.", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-09-08T14:25:25.000Z", "orgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "shortName": "apple"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://support.apple.com/en-us/HT212341"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "product-security@apple.com", "ID": "CVE-2021-30666", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "iOS", "version": {"version_data": [{"version_affected": "<", "version_value": "12.5"}]}}]}, "vendor_name": "Apple"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Processing maliciously crafted web content may lead to arbitrary code execution.\u00a0Apple is aware of a report that this issue may have been actively exploited."}]}]}, "references": {"reference_data": [{"name": "https://support.apple.com/en-us/HT212341", "refsource": "MISC", "url": "https://support.apple.com/en-us/HT212341"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:40:31.755Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://support.apple.com/en-us/HT212341"}]}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2021-30666", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-01-29T17:25:57.064117Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2021-11-03", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30666"}}}], "timeline": [{"time": "2021-11-03T00:00:00+00:00", "lang": "en", "value": "CVE-2021-30666 added to CISA KEV"}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-119", "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-01-29T17:24:29.017Z"}}]}, "cveMetadata": {"assignerOrgId": "286789f9-fbc2-4510-9f9a-43facdede74c", "assignerShortName": "apple", "cveId": "CVE-2021-30666", "datePublished": "2021-09-08T14:25:25.000Z", "dateReserved": "2021-04-13T00:00:00.000Z", "dateUpdated": "2025-07-30T01:38:00.980Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"cisaActionDue": "2021-11-17", "cisaExploitAdd": "2021-11-03", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "Apple iOS WebKit Buffer Overflow Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "matchCriteriaId": "443BF1FD-EC67-437D-A9CA-EEB3EF25B701", "versionEndExcluding": "12.5.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.."}, {"lang": "es", "value": "Se abord\u00f3 un problema de desbordamiento del b\u00fafer con un manejo de la memoria mejorada . Este problema es corregido en iOS versi\u00f3n 12.5.3. El procesamiento de contenido web dise\u00f1ado maliciosamente puede conllevar a una ejecuci\u00f3n de c\u00f3digo arbitrario. Apple presenta conocimiento de un informe que indica que este problema puede haber sido explotado activamente"}], "id": "CVE-2021-30666", "lastModified": "2025-10-23T14:55:53.840", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2021-09-08T15:15:13.553", "references": [{"source": "product-security@apple.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/HT212341"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://support.apple.com/en-us/HT212341"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30666"}], "sourceIdentifier": "product-security@apple.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2020:4035", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "webkitgtk4-0:2.28.2-2.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2025:10364", "cpe": "cpe:/o:redhat:rhel_els:7", "package": "webkitgtk4-0:2.48.3-2.el7_9", "product_name": "Red Hat Enterprise Linux 7 Extended Lifecycle Support", "release_date": "2025-07-07T00:00:00Z"}, {"advisory": "RHSA-2020:4451", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "webkit2gtk3-0:2.28.4-1.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-04T00:00:00Z"}], "bugzilla": {"description": "webkitgtk: Buffer overflow leading to arbitrary code execution", "id": "1986877", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1986877"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.5.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..", "A flaw was found in the webkitgtk package. Affected versions of this package are vulnerable to a buffer overflow caused by improper bounds checking by the WebKit component. By persuading a victim to visit a specially crafted Web site, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash."], "name": "CVE-2021-30666", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "webkitgtk", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "webkitgtk3", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "webkit2gtk3", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-07-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-30666\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-30666\nhttps://webkitgtk.org/security/WSA-2021-0004.html\nhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog"], "threat_severity": "Moderate"}

{}