CVE-2013-7353

Desbordamiento de enteros en la función png_set_unknown_chunks en libpng/pngset.c en libpng anterior a 1.5.14beta08 permite a atacantes dependientes de contexto causar una denegación de servicio (fallo de segmentación y caída) a través de un imagen manipulado, lo que provoca un desbordamiento de buffer basado en memoria dinámica.

The png_do_expand_palette function in libpng before 1.6.8 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a PLTE chunk of zero bytes or a NULL palette, related to pngrtran.c and pngset.c. An integer overflow leading to a heap-based buffer overflow was found in the png_set_sPLT() and png_set_text_2() API functions of libpng. An attacker could create a specially-crafted image file and render it with an application written to explicitly call png_set_sPLT() or png_set_text_2() function, could cause libpng to crash or execute arbitrary code with the permissions of the user running such an application. An integer overflow leading to a heap-based buffer overflow was found in the png_set_unknown_chunks() API function of libpng. An attacker could create a specially-crafted image file and render it with an application written to explicitly call png_set_unknown_chunks() function, could cause libpng to crash or execute arbitrary code with the permissions of the user running such an application.