Bug#496434: The possibility of attack with the help of symlinks in some Debian packages

2008-08-24 Thread Steve M. Robbins
severity 496434 normal
thanks

On Sun, Aug 24, 2008 at 10:05:28PM +0400, Dmitry E. Oboukhov wrote:

> In some packages I've discovered scripts with errors which may be used
> by a user for damaging important system files or user's files.

> Binary-package: mgt (2.31-5)
> file: /usr/games/mailgo

You give no indication of the problem lines in the script.  

I guess you are concerned about "cat >/tmp/mailgo$$".  If an attacker
did guess the pid, you will only be able to overwrite any file that
the user of "mailgo" can access.  I'm resetting the priority under the
assumption that no reasonable person runs "mailgo" with a privileged
account.

-Steve



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Bug#496434: The possibility of attack with the help of symlinks in some Debian packages

2008-08-24 Thread Dmitry E. Oboukhov
Package: mgt
Severity: grave

Hi, maintainer!

This message about the error concerns a few packages  at  once.   I've
tested all the packages (for Lenny) on my Debian mirror.  All  scripts
of packages (marked as executable) were tested.

In some packages I've discovered scripts with errors which may be used
by a user for damaging important system files or user's files.

For example if a script uses in its work a temp file which is  created
in /tmp directory, then every user can create symlink  with  the  same
name in this directory in order to  destroy  or  rewrite  some  system
or user file.  Symlink attack may also  lead  not  only  to  the  data
desctruction but to denial of service as well.

Even if you create files or directories with help of function 'RANDOM'
or pid(), then your system is not protected. Attacker can create many
symlinks in order to destroy your data or create 'denial  of  service'
for your package scripts.

Even if you make rm(dir) for files/directories, then  your  system  is
not protected. Attacker can permanently create symlinks.

This list is created with the help of script.  This list is sorted  by
hand. Howewer in some cases mistake is possible.

Please, Be understanding to possible mistakes. :)

I set Severity into grave for this bug. The table of discovered
problems is below.

Discussion of this bug you can see in debian-devel@:
http://lists.debian.org/debian-devel/2008/08/msg00271.html

Binary-package: r-base-core-ra (1.1.1-1)
file: /usr/lib/Ra/lib/R/bin/javareconf
Binary-package: rccp (0.9-2)
file: /usr/lib/rccp/delqueueask
Binary-package: mafft (6.240-1)
file: /usr/bin/mafft-homologs
Binary-package: openoffice.org-common (1:2.4.1-6)
file: /usr/lib/openoffice/program/senddoc
Binary-package: crossfire-maps (1.11.0-1)
file: /usr/share/games/crossfire/maps/Info/combine.pl
Binary-package: sgml2x (1.0.0-11.1)
file: /usr/bin/rlatex
Binary-package: liguidsoap (0.3.6-4)
file: /var/lib/liguidsoap/liguidsoap.py
Binary-package: citadel-server (7.37-1)
file: /usr/lib/citadel-server/migrate_aliases.sh
Binary-package: ampache (3.4.1-1)
file: /usr/share/ampache/www/locale/base/gather-messages.sh
Binary-package: xen-utils-3.2-1 (3.2.1-2)
file: /usr/lib/xen-3.2-1/bin/qemu-dm.debug
Binary-package: dtc-common (0.29.6-1)
file: /usr/share/dtc/admin/accesslog.php
file: /usr/share/dtc/admin/sa-wrapper
Binary-package: honeyd-common (1.5c-3)
file: /usr/share/honeyd/scripts/test.sh
Binary-package: lustre-tests (1.6.5-1)
file: /usr/lib/lustre/tests/runiozone
Binary-package: linuxtrade (3.65-8+b4)
file: /usr/share/linuxtrade/bin/linuxtrade.bwkvol
file: /usr/share/linuxtrade/bin/linuxtrade.wn
file: /usr/share/linuxtrade/bin/moneyam.helper
Binary-package: freevo (1.8.1-0)
file: /usr/bin/freevo.real
Binary-package: fml (4.0.3.dfsg-2)
file: /usr/share/fml/libexec/mead.pl
Binary-package: rkhunter (1.3.2-3)
file: /usr/bin/rkhunter
Binary-package: openswan (1:2.4.12+dfsg-1.1)
file: /usr/lib/ipsec/livetest
Binary-package: linux-patch-openswan (1:2.4.12+dfsg-1.1)
file: /usr/src/kernel-patches/all/openswan/packaging/utils/maysnap
file: /usr/src/kernel-patches/all/openswan/packaging/utils/maytest
Binary-package: aptoncd (0.1-1.1)
file: /usr/share/aptoncd/xmlfile.py
Binary-package: cdcontrol (1.90-1.1)
file: /usr/lib/cdcontrol/writtercontrol
Binary-package: newsgate (1.6-23)
file: /usr/bin/mkmailpost
Binary-package: gpsdrive-scripts (2.10~pre4-3)
file: /usr/bin/geo-code
Binary-package: impose+ (0.2-11)
file: /usr/bin/impose
Binary-package: mgt (2.31-5)
file: /usr/games/mailgo
Binary-package: audiolink (0.05-1)
file: /usr/bin/audiolink
Binary-package: ibackup (2.27-4.1)
file: /usr/bin/ibackup
Binary-package: emacspeak (26.0-3)
file: /usr/share/emacs/site-lisp/emacspeak/etc/extract-table.pl
Binary-package: bk2site (1:1.1.9-3.1)
file: /usr/lib/cgi-bin/bk2site/redirect.pl
Binary-package: datafreedom-perl (0.1.7-1)
file: /usr/bin/dfxml-invoice
Binary-package: emacs-jabber (0.7.91-1)
file: /usr/lib/emacsen-common/packages/install/emacs-jabber
Binary-package: lmbench (3.0-a7-1)
file: /usr/lib/lmbench/scripts/rccs
file: /usr/lib/lmbench/scripts/STUFF
Binary-package: rancid-util (2.3.2~a8-1)
file: /var/lib/rancid/getipacctg
Binary-package: ogle (0.9.2-5.2)
file: /usr/lib/ogle/ogle_audio_debug
file: /usr/lib/ogle/ogle_cli_debug
file: /usr/lib/ogle/ogle_ctrl_debug
file: /usr/lib/ogle/ogle_gui_debug
file: /usr/lib/ogle/ogle_mpeg_ps_debug
file: /usr/lib/ogle/ogle_mpeg_vs_debug
file: /usr/lib/ogle/ogle_nav_debug
file: /usr/lib/ogle/ogle_vout_debug
Binary-package: firehol (1.256-4)
file: /sbin/firehol
Binary-package: aview (1.3.0rc1-8)
file: /usr/bin/asciiview
Binary-package: radiance (3R9+20080530-3)
file: /usr/bin/optics2rad
file: /usr/bin/pdelta
file: /usr/bin/dayfact
file: /usr/bin/raddepend
Binary-package: vdr-dbg