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| From: | KDE | | Date: | 11.04.2003 | | Subject: | KDE Security Advisory: PS/PDF file handling vulnerability |
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KDE Security Advisory: PS/PDF file handling vulnerability
Original Release Date: 2003-04-09
URL: http://www.kde.org/info/security/advisory-20030409-1.txt
0. References
http://bugs.kde.org/show_bug.cgi?id=53157
http://bugs.kde.org/show_bug.cgi?id=53343
http://bugs.kde.org/show_bug.cgi?id=56808
1. Systems affected:
All KDE 2 and KDE 3 versions up to and including KDE 3.1.1.
2. Overview:
KDE uses Ghostscript software for processing of PostScript (PS)
and PDF files in a way that allows for the execution of arbitrary
commands that can be contained in such files.
An attacker can prepare a malicious PostScript or PDF file which will
provide the attacker with access to the victim's account and privileges
when the victim opens this malicious file for viewing or when the
victim browses a directory containing such malicious file and has
file previews enabled.
An attacker can provide malicious files remotely to a victim in an
e-mail, as part of a webpage, via an ftp server and possible other
means.
3. Impact:
The vulnerabilities potentially enable local or remote attackers
to compromise the privacy of a vicitim's data and to execute arbitrary
shell commands with the victim's privileges, such as erasing files or
accessing or modifying data.
4. Solution:
The affected applications have been fixed in KDE 3.0.5b and
KDE 3.1.1a, both released today. We strongly recommend upgrading
to these releases.
KDE 3.0.5b can be downloaded from
http://download.kde.org/stable/3.0.5b/
KDE 3.1.1a can be downloaded from
http://download.kde.org/stable/3.1.1a/
Please note that the KDE 3.1.1a release only consists of updates
to the affected KDE packages.
For affected KDE 2 systems, two patches for the 2.2.2 source code
have been made available which fixes these vulnerabilities. Contact
your OS vendor / binary package provider for information about how
to obtain updated binary packages.
People unable to upgrade to a version of KDE in which these problems
have been fixed can, as a temporary workaround, remove the following
files from their KDE installation:
thumbnail.protocol
eps.kimgio
kghostview.desktop
kdvi.desktop
After doing so KDE should be restarted. Note that this reduces KDE's
functionality in areas related to file previews, print previews and
limits the ability to handle PostScript (PS), PDF and DVI files.
5. Patch:
Patches for KDE 3.1.1 are available from
ftp://ftp.kde.org/pub/kde/security_patches :
a2ca01c77918b13464f2d1fc0858d6f0 post-3.1.1-kdebase-thumbnail.diff
38e2483c835239185c9c895e82079dea post-3.1.1-kdegraphics-kdvi.diff
a64ab67e3d5ab5fdbfe444fd6e1764b7 post-3.1.1-kdegraphics-kghostview.diff
9ef02df4d21b9040ef488b6f97e3e93a post-3.1.1-kdelibs-kimgio.diff
Patches for KDE 3.0.5a are available from
ftp://ftp.kde.org/pub/kde/security_patches :
b2e823b0a46ef2d949118f7fded7092e post-3.0.5a-kdebase-thumbnail.diff
8c783fbe36d25b30b4fc2c91777906a6 post-3.0.5a-kdegraphics-kdvi.diff
952ec6e4ddafd7d833106b78df2d342f post-3.0.5a-kdegraphics-kghostview.diff
604d8de4116d0a4c4896521b03884a06 post-3.0.5a-kdelibs-kimgio.diff
Patches for KDE 2.2.2 are available from
ftp://ftp.kde.org/pub/kde/security_patches :
002e297cb41705f9b744f6cc64e9d79e post-2.2.2-kdebase-thumbnail.diff
a0a87a2f7617e83c831d1a9c2588830e post-2.2.2-kdegraphics-kdvi.diff
1e7520b590e6573446487efb3995d8a3 post-2.2.2-kdegraphics-kghostview-2.diff
e2c50fb7c97e1fbc8939e30a30054e45 post-2.2.2-kdelibs-kimgio.diff
6. Timeline and credits:
04/03/2003 Notification of security@kde.org by Maksim Orlovich
about bugreport 53157, filed by Philipp Hullmann and
bugreport 56808, filed by Keith Winstein.
04/06/2003 OS vendors / binary package providers alerted.
04/07/2003 OS vendors / binary package providers provided with
patches.
04/09/2003 Public Security Advisory by the KDE Security team.
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--
Dirk
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