zsh: buffer overflow for very long fds in >& fd syntax

A buffer overflow flaw was found in the zsh shell file descriptor redirection functionality. An attacker could use this flaw to cause a denial of service by crashing the user shell...

UBUNTU-CVE-2014-10071

In exec.c in zsh before 5.0.7, there is a buffer overflow for very long fds in the "& fd" syntax...