RT 4.2.0 and above may be vulnerable to arbitrary
execution of code by way of CVE-2014-7169, CVE-2014-7186,
CVE-2014-7187, CVE-2014-6277, or CVE-2014-6271 --
collectively known as "Shellshock." This vulnerability
requires a privileged user with access to an RT instance
running with SMIME integration enabled; it applies to both
mod_perl and fastcgi deployments. If you have already
taken upgrades to bash to resolve "Shellshock," you are
protected from this vulnerability in RT, and there is no
need to apply this patch. This vulnerability has been
assigned CVE-2014-7227.