Debian Bug report logs -
#496408
The possibility of attack with the help of symlinks in some Debian packages
Reported by: "Dmitry E. Oboukhov" <dimka@uvw.ru>
Date: Sun, 24 Aug 2008 18:11:11 UTC
Severity: grave
Done: Thijs Kinkhorst <thijs@debian.org>
Bug is archived. No further changes may be made.
Display info messages
Report forwarded to debian-bugs-dist@lists.debian.org, Richard A Nelson (Rick) <cowboy@debian.org>:
Bug#496408; Package sendmail-base.
(full text , mbox , link ).
Acknowledgement sent to "Dmitry E. Oboukhov" <dimka@uvw.ru>:
New Bug report received and forwarded. Copy sent to Richard A Nelson (Rick) <cowboy@debian.org>.
(full text , mbox , link ).
Message #5 received at submit@bugs.debian.org (full text , mbox , reply ):
Package: sendmail-base
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)
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file: /usr/share/linuxtrade/bin/linuxtrade.wn
file: /usr/share/linuxtrade/bin/moneyam.helper
Binary-package: freevo (1.8.1-0)
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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: linux-patch-openswan (1:2.4.12+dfsg-1.1)
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Binary-package: newsgate (1.6-23)
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Binary-package: gpsdrive-scripts (2.10~pre4-3)
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Binary-package: impose+ (0.2-11)
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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: emacspeak (26.0-3)
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Binary-package: bk2site (1:1.1.9-3.1)
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Binary-package: datafreedom-perl (0.1.7-1)
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Binary-package: emacs-jabber (0.7.91-1)
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Binary-package: lmbench (3.0-a7-1)
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Binary-package: rancid-util (2.3.2~a8-1)
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Binary-package: ogle (0.9.2-5.2)
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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)
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Binary-package: aview (1.3.0rc1-8)
file: /usr/bin/asciiview
Binary-package: radiance (3R9+20080530-3)
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Binary-package: vdr-dbg (1.6.0-5)
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Binary-package: ogle-mmx (0.9.2-5.2)
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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
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file: /usr/lib/ogle/ogle_nav_debug
file: /usr/lib/ogle/ogle_vout_debug
Binary-package: convirt (0.8.2-3)
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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)
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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)
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file: /usr/lib/scilab-4.1.2/util/scidem
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)
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Binary-package: scratchbox2 (1.99.0.24-1)
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Binary-package: sendmail-base (8.14.3-5)
file: /usr/sbin/checksendmail
file: /usr/bin/expn
Binary-package: fwbuilder (2.1.19-3)
file: /usr/bin/fwb_install
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)
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Binary-package: postfix (2.5.2-2)
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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)
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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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Binary-package: wims (3.62-13)
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Binary-package: netmrg (0.20-1)
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Binary-package: xastir (1.9.2-1)
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Binary-package: konwert-filters (1.8-11.1)
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Binary-package: gdrae (0.1-1)
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Binary-package: lazarus-src (0.9.24-0-9)
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Reply sent to Thijs Kinkhorst <thijs@debian.org>:
You have taken responsibility.
(full text , mbox , link ).
Notification sent to "Dmitry E. Oboukhov" <dimka@uvw.ru>:
Bug acknowledged by developer.
(full text , mbox , link ).
Message #10 received at 496408-done@bugs.debian.org (full text , mbox , reply ):
[Message part 1 (text/plain, inline)]
I believe this is a non-issue, closing while no further evidence:
> Binary-package: sendmail-base (8.14.3-5)
> file: /usr/sbin/checksendmail
This script starts with the following code, seems safe to me:
use Fcntl;
foreach ("/tmp/csm$$", "/tmp/csm.in$$") {
die "Can't pre-create $_"
unless sysopen(T,$_,O_RDWR|O_CREAT|O_EXCL,0600)
and close(T);
};
> file: /usr/bin/expn
This is CVE-2003-0308 , fixed ages ago.
Thijs
[Message part 2 (application/pgp-signature, inline)]
Bug archived.
Request was from Debbugs Internal Request <owner@bugs.debian.org>
to internal_control@bugs.debian.org.
(Tue, 23 Sep 2008 07:26:41 GMT) (full text , mbox , link ).
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