Vulnerability Development: UUCP

[Izik <izik () tty64 org>]

Hello

i've found buffer overflow in uucp. in BSDi platform's
right now i've checked that on:

BSDI BSD/OS 4.0.1 Kernel #1: Thu Jun 10 15:24:57 PDT 1999
BSDI BSD/OS 3.0 Kernel #0: Thu Jan 30 13:02:43 MST 1997

versions that seems to be vuln are:

Version: uucp_args.c,v 2.1 1995/02/03 13:22:07 polk Exp
"BSD/OS 4.0 98/06/11"

Version: uucp_args.c,v 2.1 1995/02/03 13:22:07 polk Exp
"BSD/OS 3.0 97/01/17"

buffer overflow is based on command line argv. for ex:

/usr/bin/uucp `perl -e 'print "A" x 900'` `perl -e 'print "A" x 900'` 
`perl -e 'print "A" x 356'`
the ret addr is totaly writable, and it's marked as 352 - 354.
in the thrid buffer (from left to right).

since uucp is by nature suid. and the ownership is by uucp
i don't see the real profit. what does bother me is that uucp
also got a daemon ...

Singed.
izik @ http://www.tty64.org