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entity, which is not properly handled during Unicode conversion, related to the (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, and (4) mb_parse_str functions."}, {"lang": "es", "value": "Desbordamiento de b\u00fafer basado en mont\u00edculo en ext/mbstring/libmbfl/filters/mbfilter_htmlent.c en la extensi\u00f3n mbstring en PHP v4.3.0 hasta v5.2.6 permite a atacantes, dependiendo del contexto, ejecutar c\u00f3digo arbitrario a trav\u00e9s de una cadena manipulada conteniendo una entidad HTML, la cual no es manejada de forma adecuada durante la conversi\u00f3n a Unicode, relativo a (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, y (4) funciones mb_parse_str."}], "id": "CVE-2008-5557", "lastModified": "2026-04-23T00:35:47.467", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", 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[{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2009:0337", "cpe": "cpe:/o:redhat:enterprise_linux:3", "package": "php-0:4.3.2-51.ent", "product_name": "Red Hat Enterprise Linux 3", "release_date": "2009-04-06T00:00:00Z"}, {"advisory": "RHSA-2009:0337", "cpe": "cpe:/o:redhat:enterprise_linux:4", "package": "php-0:4.3.9-3.22.15", "product_name": "Red Hat Enterprise Linux 4", "release_date": "2009-04-06T00:00:00Z"}, {"advisory": "RHSA-2009:0338", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "php-0:5.1.6-23.2.el5_3", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2009-04-06T00:00:00Z"}], "bugzilla": {"description": "php: Heap-based buffer overflow in the mbstring extension via crafted string containing a HTML entity (arb code execution)", "id": "478848", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=478848"}, "csaw": false, "cwe": "CWE-122", "details": ["Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0 through 5.2.6 allows context-dependent attackers to execute arbitrary code via a crafted string containing an HTML entity, which is not properly handled during Unicode conversion, related to the (1) mb_convert_encoding, (2) mb_check_encoding, (3) mb_convert_variables, and (4) mb_parse_str functions."], "name": "CVE-2008-5557", "public_date": "2008-08-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2008-5557\nhttps://nvd.nist.gov/vuln/detail/CVE-2008-5557"], "threat_severity": "Moderate"}

{}