I can report it but I must know:
your installed open_ssl version (Debian package)
your proftpd version (Debian package package)
your apt/source.list content
The lsb_release -a result
sources.list
Code
- deb http://security.debian.org/ wheezy/updates main contrib non-freedeb-src http://security.debian.org/ wheezy/updates main contrib non-freedeb http://ftp.de.debian.org/debian wheezy main contrib non-freedeb http://ftp.us.debian.org/debian/ wheezy main non-freedeb http://volatile.debian.org/debian-volatile lenny/volatile main non-freedeb-src http://volatile.debian.org/debian-volatile lenny/volatile maindeb http://php53.dotdeb.org stable alldeb-src http://php53.dotdeb.org stable alldeb http://ftp.de.debian.org/debian experimental main contrib non-freedeb-src http://ftp.de.debian.org/debian experimental main contrib non-freedeb http://backports.debian.org/debian-backports squeeze-backports main non-free
lsb_release -a result
OpenSSL 1.0.0e 6 Sep 2011
proftpd -v