CVE-2012-6638

La función tcp_rcv_state_process en net/ipv4/tcp_input.c en el kernel de Linux anterior a 3.2.24 permite a atacantes remotos causar una denegación de servicio (consumo de recursos del kernel) a través de una inundación de paquetes TCP SYN+FIN, una vulnerabilidad diferente a CVE-2012-2663.

The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's floppy driver handled user space provided data in certain error code paths while processing FDRAWCMD IOCTL commands. A local user with write access to /dev/fdX could use this flaw to free (using the kfree() function) arbitrary kernel memory. It was found that the Linux kernel's floppy driver leaked internal kernel memory addresses to user space during the processing of the FDRAWCMD IOCTL command. A local user with write access to /dev/fdX could use this flaw to obtain information about the kernel heap arrangement.