A new horrific bash security bug has been reported a few hours ago. On the vulnerability scale its the equivalent of thermonuclear fallout.
In the context of Whonix, CPFP is affected. Things like this make me question whether it makes sense to provide CPFP by default.
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.
A detailed explanation of the bug with non-cryptic language: