CVE-2015-1593

La característica de aleatoriedad de la pila en el Kernel de Linux anterior a 3.19.1 en plataformas de 64-bits utiliza un tipo de datos incorrecto por el resultado de operaciones de bitwise left-shift, lo que hace que sea más fácil para atacantes evadir el mecanismo de protección ASLR prediciendo direcciones del tope de la pila, relacionado con la función andomize_stack_top en fs/binfmt_elf.c y la función stack_maxrandom_size en arch/x86/mm/mmap.c.

An integer overflow flaw was found in the way the Linux kernel randomized the stack for processes on certain 64-bit architecture systems, such as x86-64, causing the stack entropy to be reduced by four.

The kernel packages contain the Linux kernel, the core of any Linux operating system. A NULL pointer dereference flaw was found in the way the Linux kernel's virtual console implementation handled reference counting when accessing pseudo-terminal device files. A local, unprivileged attacker could use this flaw to crash the system. It was found that the Linux kernel's ping socket implementation did not properly handle socket unhashing during spurious disconnects, which could lead to a use-after-free flaw. On x86-64 architecture systems, a local user able to create ping sockets could use this flaw to crash the system. On non-x86-64 architecture systems, a local user able to create ping sockets could use this flaw to escalate their privileges on the system.