{"id":"CVE-2021-21708","state":"PUBLISHED","title":"UAF due to php_filter_float() failing","description":"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.","publishedAt":"2022-02-27T08:00:12.018Z","updatedAt":"2024-09-17T03:18:02.531Z","severity":{"score":8.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L","source":"php"},"assigner":"php","products":["PHP Group PHP"],"affected":[{"vendor":"PHP Group","product":"PHP","versions":[{"version":"7.4.x","status":"affected","lessThan":"7.4.28","versionType":"custom"},{"version":"8.0.X","status":"affected","lessThan":"8.0.16","versionType":"custom"},{"version":"8.1.X","status":"affected","lessThan":"8.1.3","versionType":"custom"}]}],"references":["https://bugs.php.net/bug.php?id=81708","https://security.netapp.com/advisory/ntap-20220325-0004/","https://security.gentoo.org/glsa/202209-20"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T19:47:59.168Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/21xxx/CVE-2021-21708.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-21708","state":"PUBLISHED","datePublished":"2022-02-27T08:00:12.018Z","dateUpdated":"2024-09-17T03:18:02.531Z","assignerShortName":"php","assignerOrgId":"dd77f84a-d19a-4638-8c3d-a322d820ed2b","dateReserved":"2021-01-04T00:00:00.000Z"},"containers":{"cna":{"title":"UAF due to php_filter_float() failing","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."}],"affected":[{"vendor":"PHP Group","product":"PHP","versions":[{"version":"7.4.x","status":"affected","lessThan":"7.4.28","versionType":"custom"},{"version":"8.0.X","status":"affected","lessThan":"8.0.16","versionType":"custom"},{"version":"8.1.X","status":"affected","lessThan":"8.1.3","versionType":"custom"}]}],"references":[{"url":"https://bugs.php.net/bug.php?id=81708","tags":["x_refsource_MISC"]},{"url":"https://security.netapp.com/advisory/ntap-20220325-0004/","tags":["x_refsource_CONFIRM"]},{"url":"https://security.gentoo.org/glsa/202209-20","name":"GLSA-202209-20","tags":["vendor-advisory","x_refsource_GENTOO"]}],"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":{"shortName":"php","dateUpdated":"2022-09-29T16:06:49.000Z","orgId":"dd77f84a-d19a-4638-8c3d-a322d820ed2b"},"credits":[{"lang":"en","value":"dukk at softdev dot online"}],"datePublic":"2022-02-14T00:00:00.000Z","source":{"defect":["https://bugs.php.net/bug.php?id=81708"],"discovery":"EXTERNAL"},"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":[{"title":"CVE Program Container","references":[{"url":"https://bugs.php.net/bug.php?id=81708","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://security.netapp.com/advisory/ntap-20220325-0004/","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://security.gentoo.org/glsa/202209-20","name":"GLSA-202209-20","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T18:23:28.601Z"}}]}}}