Mailinglist Archive: opensuse-security (320 mails)

[TORSTEN.NEUMANN@xxxxxx]

noexec mount option doesn´t help at all:

$ mount
/dev/vg00/lvol9 on /mnt type reiserfs (rw,noexec)
$ ./hello
-bash: ./hello: Permission denied
$ /lib/ld-linux.so.2 ./hello
hello world
$ file hello
hello: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for
GNU/Linux 2.2.0, dynamically linked (uses shared libs), not stripped

Regards
  Torsten 

> ----------
> Von: 	Peter Wiersig[SMTP:wiersig-ml@xxxxxxxxxxxxx]
> Gesendet: 	Montag, 12. Mai 2003 13:48
> An: 	suse-security@xxxxxxxx
> Betreff: 	Re: [suse-security] perl script drop
> 
> petry wrote:
> > Only a small hint for the /tmp-partition: mount it as follows in
> > /etc/fstab
> > 
> > /dev/hda5	/tmp	ext2	rw,nosuid,nodev,noexec
> > 
> > with the noexec-parameter so no one is able to execute a created
> > script from that directory
> 
> Only when the script interpreter is located on the noexec partition:
> 
> $ cat FreeSpace/hello.pl
> print "Hello world\n";
> wiersig@peter:~
> $ ls -l FreeSpace/hello*
> -rw-r--r--    1 wiersig  wiersig        23 May 12 13:47 FreeSpace/hello.pl
> -rw-r--r--    1 wiersig  wiersig        17 May 12 13:45 FreeSpace/hello.sh
> wiersig@peter:~
> $ perl FreeSpace/hello.pl
> Hello world
> 
> mount options don't help when faced with scripts.
> 
> Have fun,
> Peter
> 
> -- 
> Check the headers for your unsubscription address
> For additional commands, e-mail: suse-security-help@xxxxxxxx
> Security-related bug reports go to security@xxxxxxx, not here
>