CVE-2014-10070

zsh before 5.0.7 allows evaluation of the initial values of integer
variables imported from the environment (instead of treating them as
literal numbers). That could allow local privilege escalation, under some
specific and atypical conditions where zsh is being invoked in
privilege-elevation contexts when the environment has not been properly
sanitized, such as when zsh is invoked by sudo on systems where “env_reset”
has been disabled.