CVE-2008-5557 (GCVE-0-2008-5557)
Vulnerability from cvelistv5 – Published: 2008-12-23 18:13 – Updated: 2024-08-07 10:56
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
29 references
Date Public
2008-12-21 00:00
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"name": "oval:org.mitre.oval:def:10286",
"refsource": "OVAL",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10286"
},
{
"name": "35306",
"refsource": "SECUNIA",
"url": "http://secunia.com/advisories/35306"
},
{
"name": "SSRT100079",
"refsource": "HP",
"url": "http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02029444"
},
{
"name": "35650",
"refsource": "SECUNIA",
"url": "http://secunia.com/advisories/35650"
},
{
"name": "32948",
"refsource": "BID",
"url": "http://www.securityfocus.com/bid/32948"
},
{
"name": "DSA-1789",
"refsource": "DEBIAN",
"url": "http://www.debian.org/security/2009/dsa-1789"
}
]
}
}
}
},
"cveMetadata": {
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"assignerShortName": "mitre",
"cveId": "CVE-2008-5557",
"datePublished": "2008-12-23T18:13:00.000Z",
"dateReserved": "2008-12-15T00:00:00.000Z",
"dateUpdated": "2024-08-07T10:56:47.251Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2008-5557",
"date": "2026-09-16",
"epss": "0.07371",
"percentile": "0.94096"
},
"fkie_nvd": {
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"descriptions": "[{\"lang\": \"en\", \"value\": \"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.\"}, {\"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": "2024-11-21T00:54:20.053",
"metrics": "{\"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:C/I:C/A:C\", \"baseScore\": 10.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"COMPLETE\", \"integrityImpact\": \"COMPLETE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 10.0, \"impactScore\": 10.0, \"acInsufInfo\": false, \"obtainAllPrivilege\": true, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
"published": "2008-12-23T18:30:03.313",
"references": "[{\"url\": \"http://archives.neohapsis.com/archives/fulldisclosure/2008-12/0477.html\", \"source\": \"cve@mitre.org\"}, {\"url\": \"http://bugs.php.net/bug.php?id=45722\", \"source\": \"cve@mitre.org\", \"tags\": [\"Exploit\"]}, {\"url\": \"http://cvs.php.net/viewvc.cgi/php-src/ext/mbstring/libmbfl/filters/mbfilter_htmlent.c?r1=1.7\u0026r2=1.8\", \"source\": \"cve@mitre.org\", \"tags\": [\"Exploit\"]}, {\"url\": \"http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02029444\", \"source\": \"cve@mitre.org\"}, {\"url\": \"http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02029444\", \"source\": \"cve@mitre.org\"}, {\"url\": \"http://lists.apple.com/archives/security-announce/2009/May/msg00002.html\", \"source\": \"cve@mitre.org\"}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00002.html\", \"source\": \"cve@mitre.org\"}, {\"url\": 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{\"url\": \"http://www.us-cert.gov/cas/techalerts/TA09-133A.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"US Government Resource\"]}, {\"url\": \"http://www.vupen.com/english/advisories/2009/1297\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://exchange.xforce.ibmcloud.com/vulnerabilities/47525\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10286\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01451.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01465.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-119\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2008-5557\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2008-12-23T18:30:03.313\",\"lastModified\":\"2026-04-23T00:35:47.467\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"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 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T13:13:28+00:00",
"cve": "CVE-2008-5557",
"id": "CVE-2008-5557",
"initial_release_date": "2008-08-05T00:00:00+00:00",
"product_status:fixed": "762",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "php: Heap-based buffer overflow in the mbstring extension via crafted string containing a HTML entity (arb code execution)",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2008/cve-2008-5557.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-04-26T02:05:49Z",
"cve": "CVE-2008-5557",
"id": "CVE-2008-5557",
"initial_release_date": "2023-02-15T06:06:01Z",
"product_status:known_affected": "1",
"product_status:recommended": "45",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2008-5557",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2008-5557.json",
"version": "7"
}
}
}
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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.
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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.
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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.
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