full-disclosure - Re: a secure base system

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

From: madduck at madduck.net (martin f krafft)
Subject: Re: a secure base system

also sprach Valdis.Kletnieks@...edu <Valdis.Kletnieks@...edu> [2004.03.15.2108 +0100]:
> > On typical Linux distributions noexec is pointless.
> > It does not prevent the execution of dynamically linked ELF images.
> > 
> > $ readelf -l /bin/bash | grep interpreter
> >       [Requesting program interpreter: /lib/ld-linux.so.2]
> > 
> > $ /lib/ld-linux.so.2 /bin/bash --version
> > GNU bash, version 2.05b.0(1)-release (i386-redhat-linux-gnu)
> > Copyright (C) 2002 Free Software Foundation, Inc.
> 
> This is fixed in the 2.6 kernel.

Wow, I didn't know this. Thanks for letting us know!

piper:~> uname -a
Linux piper 2.6.4-piper #1 Sun Mar 14 18:37:46 CET 2004 i686 GNU/Linux

piper:~> cp /bin/bash /tmp

piper:~> /lib/ld-linux.so.2 /tmp/bash --version
/tmp/bash: error while loading shared libraries: /tmp/bash: failed
to map segment from shared object: Operation not permitted

-- 
martin;              (greetings from the heart of the sun.)
  \____ echo mailto: !#^."<*>"|tr "<*> mailto:" net@...duck
 
invalid/expired pgp subkeys? use subkeys.pgp.net as keyserver!
 
bill gates, 1984: "640 k ought to be enough"
bill gates, 1995: "the internet is not a primary goal for pc usage"
bill gates, 1999: "linux has no impact on microsoft's strategy"
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20040315/4df80584/attachment.bin