The gss_userok function in appl/ftp/ftpd/gss_userok.c in Heimdal 0.7.2 does not allocate memory for the ticketfile pointer before calling free, which allows remote attackers to have an unknown impact via an invalid username. NOTE: the vulnerability was originally reported for ftpd.c, but this is incorrect.
La función gss_userok de appl/ftp/ftpd/gss_userok.c en Heimdal 0.7.2 no reserva memoria para el puntero ticketfile antes de llamar a la función free, lo cual permite a atacantes remotos tener impacto desconocido mediante un nombre de usuario inválido. NOTA: la vulnerabilidad fue originalmente reportada para ftpd.c, pero esto es incorrecto.
It was found that the gss_userok() function in Heimdal 0.7.2 did not allocate memory for the ticketfile pointer before calling free(), which could possibly allow remote attackers to have an unknown impact via an invalid username. It is uncertain whether or not this is exploitable, however packages are being provided regardless.
