A siyahsapka.org advisory reads:
Hafiye-1.0 doesnt filter the payload when printing it to
the terminal. A malicious attacker can send packets with
escape sequence payloads to exploit this vulnerability.
If Hafiye has been started with -n packet count option ,
the vulnerability could allow remote code execution. For
remote code execution the victim must press Enter after
program exit.
Note that it appears that this bug can only be exploited in
conjunction with a terminal emulator that honors the
appropriate escape sequences.