CVE-2016-4434 – tika: XML External Entity vulnerability

https://notcve.org/view.php?id=CVE-2016-4434

Apache Tika before 1.13 does not properly initialize the XML parser or choose handlers, which might allow remote attackers to conduct XML External Entity (XXE) attacks via vectors involving (1) spreadsheets in OOXML files and (2) XMP metadata in PDF and other file formats, a related issue to CVE-2016-2175. Las versiones anteriores a la 1.13 de Apache Tika no inicializan el analizador sintáctico XML o elige los manipuladores correctamente, lo que podría permitir que los atacantes remotos lleven a cabo ataques XEE (XML External Entity) mediante vectores que implican (1) hojas de cálculo en archivos OOXML y (2) metadatos XMP en PDF y otros formatos de archivo. Este problema se relaciona con CVE-2016-2175. It was found that the parsing of OOXML, XMP in PDF, and some other file formats by Apache Tika would expand entity references. A remote, unauthenticated attacker could use this flaw to read files accessible to the user running the application server, and potentially perform other more advanced XXE attacks. • http://rhn.redhat.com/errata/RHSA-2017-0248.html http://rhn.redhat.com/errata/RHSA-2017-0249.html http://rhn.redhat.com/errata/RHSA-2017-0272.html http://www.securityfocus.com/archive/1/538500/100/0/threaded https://lists.apache.org/thread.html/708d94141126eac03011144a971a6411fcac16d9c248d1d535a39451%40%3Csolr-user.lucene.apache.org%3E https://mail-archives.apache.org/mod_mbox/tika-dev/201605.mbox/%3C1705136517.1175366.1464278135251.JavaMail.yahoo%40mail.yahoo.com%3E https://access.redhat.com/security& • CWE-611: Improper Restriction of XML External Entity Reference •