CVE-2016-1626

La función opj_pi_update_decode_poc en pi.c en OpenJPEG, como se utiliza en PDFium en Google Chrome en versiones anteriores a 48.0.2564.109, no calcula correctamente un determinado valor de índice de capa, lo que permite a atacantes remotos causar una denegación de servicio (lectura fuera de rango) a través de un documento PDF manipulado.

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Google Chrome. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the handling of JPEG2000 images. A specially crafted JPEG2000 image embedded inside a PDF can force Google Chrome to read memory past the end of an allocated object. An attacker can leverage this vulnerability to execute arbitrary code under the context of the current process.

Chromium is an open-source web browser, powered by WebKit. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Chromium to crash, execute arbitrary code, or disclose sensitive information when visited by the victim. All Chromium users should upgrade to these updated packages, which contain Chromium version 48.0.2564.109, which corrects these issues. After installing the update, Chromium must be restarted for the changes to take effect.