Debian Bug report logs - #496401
please make debug code use safe tempfiles

Package: postfix; Maintainer for postfix is LaMont Jones <lamont@debian.org>; Source for postfix is src:postfix.

Reported by: "Dmitry E. Oboukhov" <dimka@uvw.ru>

Date: Sun, 24 Aug 2008 18:10:52 UTC

Severity: wishlist

Tags: security

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Report forwarded to debian-bugs-dist@lists.debian.org, LaMont Jones <lamont@debian.org>:
Bug#496401; Package postfix. Full text and rfc822 format available.

Acknowledgement sent to "Dmitry E. Oboukhov" <dimka@uvw.ru>:
New Bug report received and forwarded. Copy sent to LaMont Jones <lamont@debian.org>. Full text and rfc822 format available.

Message #5 received at submit@bugs.debian.org (full text, mbox):

From: "Dmitry E. Oboukhov" <dimka@uvw.ru>
To: submit@bugs.debian.org
Cc: dimka@uvw.ru
Subject: The possibility of attack with the help of symlinks in some Debian packages
Date: Sun, 24 Aug 2008 22:05:29 +0400
Package: postfix
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)
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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)
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Binary-package: rkhunter (1.3.2-3)
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Binary-package: openswan (1:2.4.12+dfsg-1.1)
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Binary-package: mgt (2.31-5)
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Binary-package: audiolink (0.05-1)
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Binary-package: ibackup (2.27-4.1)
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    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)
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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 (1.6.0-5)
    file: /usr/bin/vdrleaktest
Binary-package: ogle-mmx (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: convirt (0.8.2-3)
    file: /usr/share/convirt/image_store/_template_/provision.sh
    file: /usr/share/convirt/image_store/Linux_CD_Install/provision.sh
    file: /usr/share/convirt/image_store/Fedora_PV_Install/provision.sh
    file: /usr/share/convirt/image_store/CentOS_PV_Install/provision.sh
    file: /usr/share/convirt/image_store/common/provision.sh
    file: /usr/share/convirt/image_store/example/provision.sh
    file: /usr/share/convirt/image_store/Windows_CD_Install/provision.sh
Binary-package: printfilters-ppd (2.13-9)
    file: /usr/lib/printfilters/master-filter
Binary-package: r-base-core (2.7.1-1)
    file: /usr/lib/R/bin/javareconf
    file: /usr/lib/R/bin/javareconf.orig
Binary-package: xmcd (2.6-19.3)
    file: /usr/share/xmcd/scripts/ncsarmt
    file: /usr/share/xmcd/scripts/ncsawrap
Binary-package: tiger (1:3.2.2-3.1)
    file: /usr/lib/tiger/util/genmsgidx
Binary-package: scilab-bin (4.1.2-5)
    file: /usr/lib/scilab-4.1.2/bin/scilink
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Binary-package: dpkg-cross (2.3.0)
    file: /usr/share/dpkg-cross/bin/gccross
Binary-package: ltp-network-test (20060918-2.1)
    file: /usr/lib/debian-test/tests/linux/testcases/bin/ftp_setup_vsftp_conf
    file: /usr/lib/debian-test/tests/linux/testcases/bin/nfs_fsstress.sh
Binary-package: cman (2.20080629-1)
    file: /usr/sbin/fence_egenera
Binary-package: scratchbox2 (1.99.0.24-1)
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Binary-package: sendmail-base (8.14.3-5)
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Binary-package: fwbuilder (2.1.19-3)
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Binary-package: sng (1.0.2-5)
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Binary-package: dist (1:3.5-17-1)
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Binary-package: sympa (5.3.4-5)
    file: /usr/lib/cgi-bin/sympa/wwsympa.fcgi
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Binary-package: postfix (2.5.2-2)
    file: /usr/lib/postfix_groups.pl
Binary-package: caudium (3:1.4.12-11)
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Binary-package: mgetty-fax (1.1.36-1.2)
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Binary-package: aegis (4.24-3)
    file: /usr/share/doc/aegis/examples/remind/bng_dvlpd.sh
    file: /usr/share/doc/aegis/examples/remind/bng_rvwd.sh
    file: /usr/share/doc/aegis/examples/remind/awt_dvlp.sh
    file: /usr/share/doc/aegis/examples/remind/awt_intgrtn.sh
Binary-package: aegis-web (4.24-3)
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Binary-package: digitaldj (0.7.5-6+b1)
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Binary-package: mon (0.99.2-12)
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Binary-package: feta (1.4.16)
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Binary-package: arb-common (0.0.20071207.1-4)
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Binary-package: qemu (0.9.1-5)
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Binary-package: apertium (3.0.7+1-1+b1)
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Binary-package: xcal (4.1-18.3)
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Binary-package: myspell-tools (1:3.1-20)
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Binary-package: gccxml (0.9.0+cvs20080525-1)
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Binary-package: freeradius-dialupadmin (2.0.4+dfsg-4)
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    file: /usr/share/freeradius-dialupadmin/bin/monthly_tot_stats
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    file: /usr/share/freeradius-dialupadmin/bin/truncate_radacct
Binary-package: dhis-server (5.3-1)
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Binary-package: wims (3.62-13)
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Binary-package: initramfs-tools (0.92f)
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Binary-package: realtimebattle-common (1.0.8-7)
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Binary-package: netmrg (0.20-1)
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Binary-package: bulmages-servers (0.11.1-2)
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Binary-package: xastir (1.9.2-1)
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Binary-package: plait (1.5.2-1)
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Binary-package: cdrw-taper (0.4-2)
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Binary-package: gdrae (0.1-1)
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Binary-package: lazarus-src (0.9.24-0-9)
    file: /usr/lib/lazarus/tools/install/create_lazarus_export_tgz.sh




Information forwarded to debian-bugs-dist@lists.debian.org, LaMont Jones <lamont@debian.org>:
Bug#496401; Package postfix. Full text and rfc822 format available.

Acknowledgement sent to Thijs Kinkhorst <thijs@debian.org>:
Extra info received and forwarded to list. Copy sent to LaMont Jones <lamont@debian.org>. Full text and rfc822 format available.

Message #10 received at 496401@bugs.debian.org (full text, mbox):

From: Thijs Kinkhorst <thijs@debian.org>
To: 496401@bugs.debian.org
Cc: control@bugs.debian.org
Subject: not a real issue
Date: Mon, 25 Aug 2008 13:06:17 +0200
[Message part 1 (text/plain, inline)]
severity 496401 wishlist
retitle 496401 please make debug code use safe tempfiles
thanks

Hi,

This is not a real issue. The files in question are only created when $debug 
is set to one. Furthermore this $debug variable is hardcoded in the script 
(not the general Postfix debugging functionality), so users would have to 
edit a script under /usr/lib to enable it. That is clearly a non-supported 
environment.

I'm leaving this as wishlist. It would be great if safe tempfiles could be 
used nonetheless. People are eager to copy code and such insecure examples 
should by preference not be present.


cheers,
Thijs
[Message part 2 (application/pgp-signature, inline)]

Severity set to `wishlist' from `grave' Request was from Thijs Kinkhorst <thijs@debian.org> to control@bugs.debian.org. (Mon, 25 Aug 2008 11:09:04 GMT) Full text and rfc822 format available.

Changed Bug title to `please make debug code use safe tempfiles' from `The possibility of attack with the help of symlinks in some Debian packages'. Request was from Thijs Kinkhorst <thijs@debian.org> to control@bugs.debian.org. (Mon, 25 Aug 2008 11:09:05 GMT) Full text and rfc822 format available.

Tags added: Request was from "Dmitry E. Oboukhov" <dimka@uvw.ru> to control@bugs.debian.org. (Tue, 26 Aug 2008 08:45:41 GMT) Full text and rfc822 format available.

Tags added: security Request was from "Dmitry E. Oboukhov" <dimka@uvw.ru> to control@bugs.debian.org. (Tue, 26 Aug 2008 08:57:30 GMT) Full text and rfc822 format available.

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