CVE-2009-3743

Un error por un paso en la función Ins_MINDEX en el intérprete de código de bytes TrueType en Ghostscript anterior a versión 8.71, permite a los atacantes remotos ejecutar código arbitrario o causar una denegación de servicio (corrupción de memoria de la pila) por medio de una fuente TrueType malformada en un documento que desencadena un desbordamiento de enteros y un desbordamiento de búfer en la región heap de la memoria.

Ghostscript is a set of software that provides a PostScript interpreter, a set of C procedures and an interpreter for Portable Document Format files. An integer overflow flaw was found in Ghostscript's TrueType bytecode interpreter. An attacker could create a specially-crafted PostScript or PDF file that, when interpreted, could cause Ghostscript to crash or, potentially, execute arbitrary code. It was found that Ghostscript always tried to read Ghostscript system initialization files from the current working directory before checking other directories, even if a search path that did not contain the current working directory was specified with the "-I" option, or the "-P-" option was used. If a user ran Ghostscript in an attacker-controlled directory containing a system initialization file, it could cause Ghostscript to execute arbitrary PostScript code.