CVE-2017-14106

La función tcp_disconnect en net/ipv4/tcp.c en el kernel de Linux en versiones anteriores a la 4.12 permite que usuarios locales provoquen una denegación de servicio allows local users to cause a denial of service (error __tcp_select_window de división por cero y bloqueo del sistema) desencadenando una desconexión en una ruta de código tcp_recvmsg determinada.

A divide-by-zero vulnerability was found in the __tcp_select_window function in the Linux kernel. This can result in a kernel panic causing a local denial of service.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: Out-of-bounds kernel heap access vulnerability was found in xfrm, kernel's IP framework for transforming packets. An error dealing with netlink messages from an unprivileged user leads to arbitrary read/write and privilege escalation. A race condition issue leading to a use-after-free flaw was found in the way the raw packet sockets are implemented in the Linux kernel networking subsystem handling synchronization. A local user able to open a raw packet socket could use this flaw to elevate their privileges on the system.