CVE-2009-1298

La función ip_frag_reasm en el archivo net/ipv4/ip_fragment.c en el kernel de Linux versiones 2.6.32-rc8, y 2.6.29 y versiones posteriores anteriores a 2.6.32, llama a IP_INC_STATS_BH con un argumento incorrecto, que permite a atacantes remotos causar una denegación de servicio (suspensión y desreferencia de puntero NULL) por medio de paquetes IP largos, posiblemente relacionados con la función ip_defrag.

David Ford discovered that the IPv4 defragmentation routine did not correctly handle oversized packets. A remote attacker could send specially crafted traffic that would cause a system to crash, leading to a denial of service. (The fix was included in the earlier kernels from USN-864-1.) Akira Fujita discovered that the Ext4 "move extents" ioctl did not correctly check permissions. A local attacker could exploit this to overwrite arbitrary files on the system, leading to root privilege escalation.