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- Newsgroups: comp.sys.hp
- Path: sparky!uunet!mcsun!Germany.EU.net!news.netmbx.de!zrz.tu-berlin.de!math.fu-berlin.de!news.th-darmstadt.de!misch
- From: misch@rbhp90.rbg.informatik.th-darmstadt.de (Clemens Misch)
- Subject: Re: HP 9000/370, no root password!
- Sender: news@news.th-darmstadt.de (The Usenet-News System)
- Message-ID: <1992Aug19.194914.18855@news.th-darmstadt.de>
- Date: Wed, 19 Aug 1992 19:49:14 GMT
- Reply-To: misch@rbhp90.rbg.informatik.th-darmstadt.de
- References: <1992Aug15.022529.7176@mccc.edu> <1992Aug18.064054.8484@nessie.mcc.ac.uk> <1992Aug19.152522.2758@gdwest.gd.com>
- Nntp-Posting-Host: rbhp90.rbg.informatik.th-darmstadt.de
- Organization: Rechnerbetriebsgruppe FB20; TH Darmstadt (Germany)
- Lines: 54
-
-
- In article <1992Aug19.152522.2758@gdwest.gd.com>, good@gdwest.gd.com (David L. Good) writes:
- > In article <1992Aug18.064054.8484@nessie.mcc.ac.uk> LeBlanc@mcc.ac.uk writes:
- [ ... ]
- > >I've never done this with a 370, but on 340's you can easily
- > >interrupt the boot sequence while fsck is being performed and
- > >get root privileges. An fsck will be performed if the system is
- > >switched off without using reboot or shutdown: do a sync first,
- > >if you can, to minimise damage.
- > >
- > >Once you have root privileges, you can edit /etc/passwd and reboot.
- > >
- >
- > That's certainly an interesting "feature". Is there any way to prevent
- > this from occuring? We have a network of ~60 350s, and I'd hate to have
- > users be able to be superuser anytime they want just by cycling power on
- > a workstation!
-
- We inserted following line in all /etc/*rc scripts right after
- '#!/bin/sh':
-
- trap "" 1 2 3 5 9 15
-
- This should help a lot. I don't know if it is safe. One can possibly
- catch the short timespan between fork and the execution of "trap", but
- this is a very small window.
-
- Some other interesting "feature" of the bootrom (this is of concern
- only if you have a floppy drive connected to your machines):
-
- Any time the bootrom reports 'HIL Keyboard' you can type SPACE and
- then a 'System selection' Menu will be displayed. If you have a valid
- HPUX floppy in the drive, you can boot the machine from floppy.
- If your users have write access to the floppy-drive, then it is very
- easy even for a semi-competent usere to create a bootable HPUX floppy.
-
- Of course this system runs in single user mode and has root
- priviledge :-(
-
- It is possible to remove the HP-IB devices from the system searchlist
- of the bootrom, but of course this can be undone if one knows.
-
- I'd like to see a sort of password in the bootrom.
-
- I think this should be done ASAP. HPUX may be certified C2 but the
- system consisting of bootrom and HPUX is certainly not (IMO)
-
- --
- ===============================================================================
- Clemens Misch Rechnerbetriebsgruppe FB20
- Merckstrasse 25
- EMail: misch@rbhp90.rbg.informatik.th-darmstadt.de W6100 Darmstadt (Germany)
- Tel.: +49 6151 163514
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