CVE-2013-0211

Error de signo de enteros en la función archive_write_zip_data de archive_write_set_format_zip.c en la versión 3.1.2 y anteriores, cuando se ejecuta en equipos de 64 bits, permite a atacantes dependientes del contexto causar una denegación del servicio (caída) a través de vectores sin especificar, que desencadena en una conversión incorrecta entre tipos con signo y sin signo, dando lugar a un desbordamiento de búfer.

Fabian Yamaguchi reported a read buffer overflow flaw in libarchive on 64-bit systems where sizeof is equal to 8. In the archive_write_zip_data() function in libarchive/ archive_write_set_format_zip.c, the s parameter is of type size_t and is cast to a 64 bit signed integer. If s is larger than MAX_INT, it will not be set to zip->remaining_data_bytes even though it is larger than zip->remaining_data_bytes, which leads to a buffer overflow when calling deflate(). This can lead to a segfault in an application that uses libarchive to create ZIP archives. The updated packages have been patched to correct this issue.