KDE start_kdeinit Input Validation Flaw May Let Local Users Gain Elevated Privileges
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SecurityTracker Alert ID: 1019924 |
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SecurityTracker URL: http://securitytracker.com/id/1019924
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CVE Reference:
CVE-2008-1671
(Links to External Site)
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Date: Apr 26 2008
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Impact:
Root access via local system, User access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 3.5.5 to 4.0
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Description:
A vulnerability was reported in KDE. A local user may be able to obtain elevated privileges on the target system.
The start_kdeinit wrapper does not properly process user-supplied input. A local user may be able to send UNIX signals to other processes to cause denial of service conditions or execute arbitrary code.
start_kdeinit is installed with set user id (setuid) root privileges by default.
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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 for KDE 3.5.5 - KDE 3.5.9, available at:
ftp://ftp.kde.org/pub/kde/security_patches
9d99d5f02b696e7a493836f285a319da post-kde-3.5.5-kinit.diff
The vendor's advisory is available at:
http://www.kde.org/info/security/advisory-20080426-2.txt
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Vendor URL: www.kde.org/info/security/advisory-20080426-2.txt (Links to External Site)
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Cause:
Input validation 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: Fri, 25 Apr 2008 20:43:58 -0400
Subject: KDE
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KDE Security Advisory: start_kdeinit multiple vulnerabilities
Original Release Date: 2008-04-26
URL: http://www.kde.org/info/security/advisory-20080426-2.txt
0. References
CVE-2008-1671
1. Systems affected:
start_kdeinit of KDE 3.x as of KDE 3.5.5 or newer. KDE 4.0
and newer is not affected. Only Linux platform is affected.
2. Overview:
start_kdeinit is a wrapper to launch kdeinit with a lower OOM
score on Linux. This helper is used to ensure that a
single KDE application triggering the Linux kernel OOM killer
does not kill the whole KDE session. By default,
start_kdeinit is installed as setuid root. The start_kdeinit
processing of user-influenceable input is faulty.
3. Impact:
If start_kdeinit is installed as setuid root, a local user
might be able to send unix signals to other processes, cause
a denial of service or even possibly execute arbitrary code.
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:
A patch for KDE 3.5.5 - KDE 3.5.9 is available from
ftp://ftp.kde.org/pub/kde/security_patches :
9d99d5f02b696e7a493836f285a319da post-kde-3.5.5-kinit.diff
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