CVE-2013-4312

El kernel de Linux en versiones anteriores a 4.4.1 permite a usuarios locales eludir los limites de descriptor de fichero y provocar una denegación de servicio (consumo de memoria) enviando cada descriptor a través de un socket UNIX antes de cerrarlo, relacionado con net/unix/af_unix.c y net/unix/garbage.c.

It was found that the Linux kernel did not properly account file descriptors passed over the unix socket against the process limit. A local user could use this flaw to exhaust all available memory on the system.

Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. Various other issues were also addressed.