GNU Bash through 4.3 processes trailing strings after function definitions
in the values of environment variables, which allows remote attackers to
execute arbitrary code via a crafted environment, as demonstrated by
vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and
mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified
DHCP clients, and other situations in which setting the environment occurs
across a privilege boundary from Bash execution, aka "ShellShock." NOTE:
the original fix for this issue was incorrect; CVE-2014-7169 has been
assigned to cover the vulnerability that is still present after the
incorrect fix.

mdeslaur