KDE langen2kvtml Temporary File Flaw May Let Local Users Gain Elevated Privileges
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SecurityTracker Alert ID: 1014675 |
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SecurityTracker URL: http://securitytracker.com/id/1014675
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CVE Reference:
CVE-2005-2101
(Links to External Site)
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Updated: Jun 8 2008
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Original Entry Date: Aug 15 2005
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Impact:
Modification of system information, Modification of user information, User access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 3.0 - 3.4.2
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Description:
A vulnerability was reported in KDE in langen2kvtml. A local user can obtain elevated privileges.
langen2kvtml processes temporary files in an unsafe manner. A local user can create a symbolic link (symlink) from a critical file on the system to a predictable temporary file in '/tmp' to be used by langen2kvtml. Then, when a target user runs langen2kvtml, the symlinked file may be overwritten with the privileges of the target user.
Ben Burton notified the vendor of this vulnerability. Javier Fernandez-Sanguino Pena discovered this vulnerability.
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Impact:
A local user may be able to obtain elevated privileges on the target system.
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Solution:
The vendor has issued a patch:
Patch for KDE 3.4.2 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
0e82c5810df3b04370188ba13cc50203 post-3.4.2-kdeedu.diff
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Vendor URL: www.kde.org/info/security/advisory-20050815-1.txt (Links to External Site)
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Cause:
Access control error, State error
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Underlying OS:
Linux (Any)
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Message History:
None.
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Source Message Contents
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Date: Mon, 15 Aug 2005 02:05:33 -0400
Subject: http://www.kde.org/info/security/advisory-20050815-1.txt
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
KDE Security Advisory: langen2kvtml tempfile vulnerability
Original Release Date: 2008-08-15
URL: http://www.kde.org/info/security/advisory-20050815-1.txt
0. References
CAN-2005-2101
1. Systems affected:
All KDE releases starting from KDE 3.0 up to including
KDE 3.4.2.
2. Overview:
Ben Burton notified the KDE security team about several
tempfile handling related vulnerabilities in langen2kvtml,
a conversion script for kvoctrain. This vulnerability was
initially discovered by Javier Fernández-Sanguino Peña.
The script uses known filenames in /tmp which allow an
local attacker to overwrite files writeable by the
user (manually) invoking the conversion script.
3. Impact:
A local file can overwrite files and possibly elevate
privileges.
4. Solution:
Source code patches have been made available which fix these
vulnerabilities. Contact your OS vendor / binary package provider
for information about how to obtain updated binary packages.
5. Patch:
Patch for KDE 3.4.2 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
0e82c5810df3b04370188ba13cc50203 post-3.4.2-kdeedu.diff
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