CVE-2017-1000257

{"id": "CVE-2017-1000257", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.4, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 4.9, "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": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "published": "2017-10-31T21:29:00.203", "references": [{"url": "http://www.debian.org/security/2017/dsa-4007", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.securityfocus.com/bid/101519", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "http://www.securitytracker.com/id/1039644", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:3263", "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2018:2486", "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2018:3558", "source": "cve@mitre.org"}, {"url": "https://curl.haxx.se/docs/adv_20171023.html", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/201712-04", "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-119"}]}], "descriptions": [{"lang": "en", "value": "An IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded."}, {"lang": "es", "value": "Una l\u00ednea de respuesta IMAP FETCH indica el tama\u00f1o de los datos devueltos en n\u00famero de bytes. Cuando una respuesta indica que el tama\u00f1o de los datos es cero bytes, libcurl pasar\u00eda esos datos (inexistentes) con un puntero y el tama\u00f1o (cero) a la funci\u00f3n deliver-data. La funci\u00f3n deliver-data de libcurl trata el cero como un n\u00famero m\u00e1gico e invoca strlen() en los datos para adivinar la longitud. Se llama a strlen() en un b\u00fafer basado en memoria din\u00e1mica (heap) que podr\u00eda no terminar en cero, por lo que libcurl podr\u00eda leer m\u00e1s all\u00e1 del final del b\u00fafer en cualquier memoria en la que se encuentre despu\u00e9s (o simplemente provocar un cierre inesperado) y entregar los datos a la aplicaci\u00f3n como si en realidad se hubieran descargado."}], "lastModified": "2018-11-13T11:29:07.977", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A472460B-2EE1-49F4-BF4F-CFFB6EDDEE8A", "versionEndIncluding": "7.56.0", "versionStartIncluding": "7.20.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}