CVE-2017-9047

{"id": "CVE-2017-9047", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": true, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2017-05-18T06:29:00.403", "references": [{"url": "http://www.debian.org/security/2017/dsa-3952", "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2017/05/15/1", "tags": ["Exploit", "Mailing List", "Patch", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.securityfocus.com/bid/98599", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E", "source": "cve@mitre.org"}, {"url": "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E", "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/201711-01", "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. The variable len is assigned strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content->prefix is appended to buf (if it actually fits) whereupon (ii) content->name is written to the buffer. However, the check for whether the content->name actually fits also uses 'len' rather than the updated buffer length strlen(buf). This allows us to write about \"size\" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash."}, {"lang": "es", "value": "Se detect\u00f3 un desbordamiento de b\u00fafer en libxml2 versi\u00f3n 20904-GITv2.9.4-16-g0741801. La funci\u00f3n xmlSnprintfElementContent en el archivo valid.c debe volcar recursivamente la definici\u00f3n del contenido del elemento en un b\u00fafer de caracteres 'buf' de tama\u00f1o \"size\". La variable len es asignada strlen (buf). Si el content-)type es XML_ELEMENT_CONTENT_ELEMENT, entonces (i) content-)prefix se agrega a buf (si realmente encaja) con lo cual (ii) content-)name se escribe en el b\u00fafer. Sin embargo, la comprobaci\u00f3n de si el content-)name realmente se ajusta tambi\u00e9n usa 'len' en lugar de la longitud de b\u00fafer actualizada (buf). Esto nos permite escribir sobre \"size\" muchos bytes m\u00e1s all\u00e1 de la memoria asignada. Esta vulnerabilidad causa que los programas que usan libxml2, como PHP, se bloqueen."}], "lastModified": "2023-11-07T02:50:35.677", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:xmlsoft:libxml2:2.9.4:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "430C1FDF-1239-4FF2-B5A4-8CED209B8036"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}