Dmitry E. Oboukhov
2008-Aug-24 18:05 UTC
[Pkg-xen-devel] Bug#496367: The possibility of attack with the help of symlinks in some Debian packages
Package: xen-utils-3.2-1
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)
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Binary-package: convirt (0.8.2-3)
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Binary-package: xmcd (2.6-19.3)
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Binary-package: ltp-network-test (20060918-2.1)
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Julien Danjou
2008-Aug-25 11:51 UTC
[Pkg-xen-devel] Bug#496367: Bug#496367: The possibility of attack with the help of symlinks in some Debian packages
severity 496367 normal thanks At 1219601128 time_t, Dmitry E. Oboukhov wrote:> Binary-package: xen-utils-3.2-1 (3.2.1-2) > file: /usr/lib/xen-3.2-1/bin/qemu-dm.debugSince this is a poor buggy debug-script, I'm setting the severity to normal. It won't affect anyone sane. I've also pushed a fix in the svn repository which fix it. Cheers, -- Julien Danjou .''`. Debian Developer : :' : http://julien.danjou.info `. `' http://people.debian.org/~acid `- 9A0D 5FD9 EB42 22F6 8974 C95C A462 B51E C2FE E5CD -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 197 bytes Desc: Digital signature Url : http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20080825/d450864f/attachment.pgp
Debian Bug Tracking System
2009-Jul-01 17:51 UTC
[Pkg-xen-devel] Bug#496367: marked as done (The possibility of attack with the help of symlinks in some Debian packages)
Your message dated Wed, 01 Jul 2009 17:41:17 +0000 with message-id <E1MM3o5-0005Rv-Of at ries.debian.org> and subject line Bug#496367: fixed in xen-3 3.4.0-1 has caused the Debian Bug report #496367, regarding The possibility of attack with the help of symlinks in some Debian packages to be marked as done. This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact owner at bugs.debian.org immediately.) -- 496367: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496367 Debian Bug Tracking System Contact owner at bugs.debian.org with problems -------------- next part -------------- An embedded message was scrubbed... From: "Dmitry E. Oboukhov" <dimka at uvw.ru> Subject: The possibility of attack with the help of symlinks in some Debian packages Date: Sun, 24 Aug 2008 22:05:28 +0400 Size: 12150 URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20090701/b15c50ee/attachment-0002.eml> -------------- next part -------------- An embedded message was scrubbed... From: Bastian Blank <waldi at debian.org> Subject: Bug#496367: fixed in xen-3 3.4.0-1 Date: Wed, 01 Jul 2009 17:41:17 +0000 Size: 6791 URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20090701/b15c50ee/attachment-0003.eml>