CVE-2021-21708

{"containers": {"cna": {"affected": [{"product": "PHP", "vendor": "PHP Group", "versions": [{"lessThan": "7.4.28", "status": "affected", "version": "7.4.x", "versionType": "custom"}, {"lessThan": "8.0.16", "status": "affected", "version": "8.0.X", "versionType": "custom"}, {"lessThan": "8.1.3", "status": "affected", "version": "8.1.X", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "dukk at softdev dot online"}], "datePublic": "2022-02-14T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-416", "description": "CWE-416 Use After Free", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-09-29T16:06:49.000Z", "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b", "shortName": "php"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://bugs.php.net/bug.php?id=81708"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://security.netapp.com/advisory/ntap-20220325-0004/"}, {"name": "GLSA-202209-20", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/202209-20"}], "source": {"defect": ["https://bugs.php.net/bug.php?id=81708"], "discovery": "EXTERNAL"}, "title": "UAF due to php_filter_float() failing", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@php.net", "DATE_PUBLIC": "2022-02-14T08:00:00.000Z", "ID": "CVE-2021-21708", "STATE": "PUBLIC", "TITLE": "UAF due to php_filter_float() failing"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "PHP", "version": {"version_data": [{"version_affected": "<", "version_name": "7.4.x", "version_value": "7.4.28"}, {"version_affected": "<", "version_name": "8.0.X", "version_value": "8.0.16"}, {"version_affected": "<", "version_name": "8.1.X", "version_value": "8.1.3"}]}}]}, "vendor_name": "PHP Group"}]}}, "credit": [{"lang": "eng", "value": "dukk at softdev dot online"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-416 Use After Free"}]}]}, "references": {"reference_data": [{"name": "https://bugs.php.net/bug.php?id=81708", "refsource": "MISC", "url": "https://bugs.php.net/bug.php?id=81708"}, {"name": "https://security.netapp.com/advisory/ntap-20220325-0004/", "refsource": "CONFIRM", "url": "https://security.netapp.com/advisory/ntap-20220325-0004/"}, {"name": "GLSA-202209-20", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/202209-20"}]}, "source": {"defect": ["https://bugs.php.net/bug.php?id=81708"], "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:23:28.601Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugs.php.net/bug.php?id=81708"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://security.netapp.com/advisory/ntap-20220325-0004/"}, {"name": "GLSA-202209-20", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/202209-20"}]}]}, "cveMetadata": {"assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b", "assignerShortName": "php", "cveId": "CVE-2021-21708", "datePublished": "2022-02-27T08:00:12.018Z", "dateReserved": "2021-01-04T00:00:00.000Z", "dateUpdated": "2024-09-17T03:18:02.531Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "PHP", "vendor": "PHP Group", "versions": [{"lessThan": "7.4.28", "status": "affected", "version": "7.4.x", "versionType": "custom"}, {"lessThan": "8.0.16", "status": "affected", "version": "8.0.X", "versionType": "custom"}, {"lessThan": "8.1.3", "status": "affected", "version": "8.1.X", "versionType": "custom"}]}], "source": "security@php.net"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", "matchCriteriaId": "07B88F14-3867-49F4-8BE6-64E1D98927AB", "versionEndExcluding": "7.4.28", "versionStartIncluding": "7.4.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", "matchCriteriaId": "AC80C1D0-09AC-43B1-A653-7ECFB37DC42E", "versionEndExcluding": "8.0.16", "versionStartIncluding": "8.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", "matchCriteriaId": "B7E795BC-F012-4904-B445-D76E358EC66D", "versionEndExcluding": "8.1.3", "versionStartIncluding": "8.1.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits."}, {"lang": "es", "value": "En PHP versiones 7.4.x anteriores a 7.4.28, versiones 8.0.x anteriores a 8.0.16 y versiones 8.1.x anteriores a 8.1.3, cuando son usados funciones de filtrado con el filtro FILTER_VALIDATE_FLOAT y los l\u00edmites m\u00ednimo/m\u00e1ximo, si el filtro falla, se presenta la posibilidad de que sea activado el uso de la memoria asignada despu\u00e9s de liberarla, lo que puede resultar en un bloqueo, y potencialmente la sobreescritura de otros trozos de memoria y RCE. Este problema afecta a: el c\u00f3digo que usa FILTER_VALIDATE_FLOAT con l\u00edmites m\u00edn/m\u00e1x."}], "id": "CVE-2021-21708", "lastModified": "2026-06-17T03:36:02.283", "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": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "security@php.net", "type": "Secondary"}, {"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": "2022-02-27T08:15:06.817", "references": [{"source": "security@php.net", "tags": ["Exploit", "Issue Tracking", "Patch", "Vendor Advisory"], "url": "https://bugs.php.net/bug.php?id=81708"}, {"source": "security@php.net", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202209-20"}, {"source": "security@php.net", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20220325-0004/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Patch", "Vendor Advisory"], "url": "https://bugs.php.net/bug.php?id=81708"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202209-20"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20220325-0004/"}], "sourceIdentifier": "security@php.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "security@php.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:7624", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "php:8.0-8070020220801083134.afd00e68", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-08T00:00:00Z"}, {"advisory": "RHSA-2022:7628", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "php:7.4-8070020220707122009.afd00e68", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-08T00:00:00Z"}, {"advisory": "RHSA-2025:3076", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "php:7.4-8040020250311105031.d7c09045", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-03-20T00:00:00Z"}, {"advisory": "RHSA-2025:3076", "cpe": "cpe:/a:redhat:rhel_tus:8.4", "package": "php:7.4-8040020250311105031.d7c09045", "product_name": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "release_date": "2025-03-20T00:00:00Z"}, {"advisory": "RHSA-2025:3076", "cpe": "cpe:/a:redhat:rhel_e4s:8.4", "package": "php:7.4-8040020250311105031.d7c09045", "product_name": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions", "release_date": "2025-03-20T00:00:00Z"}, {"advisory": "RHSA-2025:3016", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "php:7.4-8060020250311104929.5caa48ff", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-03-18T00:00:00Z"}, {"advisory": "RHSA-2025:3016", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "php:7.4-8060020250311104929.5caa48ff", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-03-18T00:00:00Z"}, {"advisory": "RHSA-2025:3016", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "php:7.4-8060020250311104929.5caa48ff", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-03-18T00:00:00Z"}, {"advisory": "RHSA-2022:8197", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "php-0:8.0.20-3.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "php: Use after free due to php_filter_float() failing for ints", "id": "2055879", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2055879"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In PHP versions 7.4.x below 7.4.28, 8.0.x below 8.0.16, and 8.1.x below 8.1.3, when using filter functions with FILTER_VALIDATE_FLOAT filter and min/max limits, if the filter fails, there is a possibility to trigger use of allocated memory after free, which can result it crashes, and potentially in overwrite of other memory chunks and RCE. This issue affects: code that uses FILTER_VALIDATE_FLOAT with min/max limits.", "A flaw was found in PHP. The vulnerability occurs due to the malformed php_filter_float() function and leads to a use-after-free vulnerability. This flaw allows an attacker to inject a malicious file, leading to a crash or a Segmentation fault."], "name": "CVE-2021-21708", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "php", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "php", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "rh-php73-php", "product_name": "Red Hat Software Collections"}], "public_date": "2022-02-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-21708\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-21708\nhttps://www.php.net/ChangeLog-7.php#PHP_7_4"], "threat_severity": "Important"}

{}