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CVSS: 8.8EPSS: 0%CPEs: 1EXPL: 0

Lib/webbrowser.py in Python through 3.6.3 does not validate strings before launching the program specified by the BROWSER environment variable, which might allow remote attackers to conduct argument-injection attacks via a crafted URL. NOTE: a software maintainer indicates that exploitation is impossible because the code relies on subprocess.Popen and the default shell=False setting ** EN DISPUTA ** Lib/webbrowser.py en Python hasta la versión 3.6.3 no valida las cadenas antes de iniciar el programa especificado por la variable de entorno BROWSER. Esto podría permitir que atacantes remotos lleven a cabo ataques de inyección de argumentos mediante una URL manipulada. NOTA: el mantenedor del software indica que es imposible la explotación de esta vulnerabilidad debido a que el código confía en subprocess.Popen y el ajuste por defecto shell=False. • http://www.securityfocus.com/bid/102207 https://bugs.python.org/issue32367 https://security-tracker.debian.org/tracker/CVE-2017-17522 • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') •

CVSS: 7.5EPSS: 0%CPEs: 9EXPL: 1

XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD. Una vulnerabilidad de XML External Entity (XEE) en libexpat versión 2.2.0 y anteriores (Expat XML Parser Library) permite que los atacantes consigan que el analizador entre en un bucle infinito utilizando una definición de entidad externa mal formada desde una DTD externa. • http://www.debian.org/security/2017/dsa-3898 http://www.openwall.com/lists/oss-security/2017/06/17/7 http://www.securityfocus.com/bid/99276 http://www.securitytracker.com/id/1039427 https://github.com/libexpat/libexpat/blob/master/expat/Changes https://libexpat.github.io/doc/cve-2017-9233 https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40% • CWE-611: Improper Restriction of XML External Entity Reference CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •

CVSS: 9.8EPSS: 1%CPEs: 9EXPL: 0

An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox < 50. Desbordamiento de enteros durante el análisis de XML mediante la biblioteca Expat. La vulnerabilidad afecta a Firefox en versiones anteriores a la 50. • http://www.securityfocus.com/bid/94337 http://www.securitytracker.com/id/1037298 http://www.securitytracker.com/id/1039427 https://bugzilla.mozilla.org/show_bug.cgi?id=1274777 https://www.debian.org/security/2017/dsa-3898 https://www.mozilla.org/security/advisories/mfsa2016-89 • CWE-190: Integer Overflow or Wraparound •

CVSS: 8.1EPSS: 1%CPEs: 8EXPL: 0

The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716. La protección de desbordamiento en Expat es eliminada por los compiladores con ciertos ajustes de optimización, lo que permite a atacantes remotos provocar una denegación de servicio (caída) o posiblemente ejecutar código arbitrario a través de datos XML manipulados. NOTA: esta vulnerabilidad existe debido a una solución incompleta para CVE-2015-1283 y CVE-2015-2716. • http://www.securityfocus.com/bid/91528 http://www.ubuntu.com/usn/USN-3013-1 https://bugzilla.redhat.com/show_bug.cgi?id=1344251 https://kc.mcafee.com/corporate/index?page=content&id=SB10365 https://security.gentoo.org/glsa/201701-21 https://sourceforge.net/p/expat/code_git/ci/f0bec73b018caa07d3e75ec8dd967f3785d71bde https://www.tenable.com/security/tns-2016-20 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •

CVSS: 9.8EPSS: 0%CPEs: 26EXPL: 0

Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow. Expat permite a atacantes dependientes del contexto provocar una denegación de servicio (caída) o posiblemente ejecutar código arbitrario a través de un documento de entrada mal formado, lo que desencadena un desbordamiento de buffer. An out-of-bounds read flaw was found in the way Expat processed certain input. A remote attacker could send specially crafted XML that, when parsed by an application using the Expat library, would cause that application to crash or, possibly, execute arbitrary code with the permission of the user running the application. • http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00064.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00006.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00007.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00010.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html http://lists.opensuse.org/opensuse-security-announce/2016-08 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-125: Out-of-bounds Read •