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La funci\u00f3n interna Curl_ntlm_core_mk_nt_hash multiplica la longitud de la contrase\u00f1a por dos (SUM) para adivinar qu\u00e9 tama\u00f1o debe tener la zona de almacenamiento temporal que se va a asignar desde la memoria din\u00e1mica (heap). El valor de longitud se emplea a continuaci\u00f3n para iterar sobre la contrase\u00f1a y generar una salida en el b\u00fafer de almacenamiento asignado. En sistemas con un size_t de 32 bits, la matem\u00e1tica para calcular SUM desencadena un desbordamiento de enteros cuando la contrase\u00f1a excede los 2 GB (2^31 bytes). Este desbordamiento de enteros suele provocar que un b\u00fafer muy peque\u00f1o se asigne en lugar del planeado (uno muy grande), por lo que su uso termina con un desbordamiento de b\u00fafer basado en memoria din\u00e1mica (heap). 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Collections for Red Hat Enterprise Linux 7.5 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-curl-0:7.61.1-1.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-httpd-0:2.4.34-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2018-11-13T00:00:00Z"}, {"advisory": "RHSA-2018:3558", "cpe": "cpe:/a:redhat:rhel_software_collections:3::el7", "package": "httpd24-nghttp2-0:1.7.1-7.el7", "product_name": "Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2018-11-13T00:00:00Z"}], "bugzilla": {"description": "curl: NTLM password overflow via integer overflow", "id": "1622707", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1622707"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-131->CWE-122", "details": ["curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap. The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is almost identical to CVE-2017-8816.)"], "name": "CVE-2018-14618", "package_state": [{"cpe": "cpe:/a:redhat:rhel_dotnet:1.0", "fix_state": "Out of support scope", "package_name": "rh-dotnetcore10-curl", "product_name": ".NET Core 1.0 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:1.1", "fix_state": "Out of support scope", "package_name": "rh-dotnetcore11-curl", "product_name": ".NET Core 1.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:2.0", "fix_state": "Out of support scope", "package_name": "rh-dotnet20-curl", "product_name": ".NET Core 2.0 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/a:redhat:rhel_dotnet:2.1", "fix_state": "Will not fix", "package_name": "rh-dotnet21-curl", "product_name": ".NET Core 2.1 on Red Hat Enterprise Linux"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:jboss_core_services:1", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat JBoss Core Services"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "curl", "product_name": "Red Hat JBoss Web Server 3"}], "public_date": "2018-09-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-14618\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-14618\nhttps://curl.haxx.se/docs/CVE-2018-14618.html"], "threat_severity": "Low", "upstream_fix": "curl 7.61.1"}