(Debian Issues Fix) LuxMan Game Software File Path Bug May Let Local Users Gain Root Access on the System
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SecurityTracker Alert ID: 1005549 |
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SecurityTracker URL: http://securitytracker.com/id/1005549
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CVE Reference:
CAN-2002-1245
(Links to External Site)
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Date: Nov 6 2002
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Impact:
Disclosure of authentication information, Disclosure of system information, Modification of authentication information, Modification of system information, Root access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 0.41
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Description:
A vulnerability was reported in the LuxMan game software. A local user can gain access to /dev/mem, potentially yielding root access.
iDEFENSE reported that the 'maped' process, which is configured with set user id (setuid) root privileges, contains a flaw. The code executes 'gzip' without specifying the full path to the executable. So, a local user can create a replacement gzip binary and modify the PATH environment variable to cause the maped process to execute the user's replacement gzip binary.
Exploiting this behavior, a local user can cause certain file operations to be performed with root privileges. A demonstration exploit transcript that duplicates /dev/mem to a readable temporary file is provided in the Source Message. This demonstration exploit shows how a local user might gain read or write access to critical memory contents. A local user could potentially view passwords or modify kernel memory to gain root privileges on the system.
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Impact:
A remote user can cause certain file operations to be executed with root privileges. A remote user could gain read/write access to /dev/mem, potentially accessing critical memory contents that could lead to root access on the system.
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Solution:
Debian has released a fix in version 0.41-17.1 the current stable distribution (woody) and in version 0.41-19 for the unstable distribution (sid). The old stable distribution (potato) does not contain a luxman package
For Debian GNU/Linux 3.0 alias woody:
This package is only available for the IA-32 architecture.
Source archives:
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41-17.1.dsc
Size/MD5 checksum: 570 6f07d15342abd605028d3cfde3dd1e6a
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41-17.1.diff.gz
Size/MD5 checksum: 6955 0ede91f130be23bd67383f47e6b51ccb
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41.orig.tar.gz
Size/MD5 checksum: 268279 aa389327578e2d65f3f5035193e407cb
Intel IA-32 architecture:
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41-17.1_i386.deb
Size/MD5 checksum: 290680 e9aa37d421068e828307ef5c816ad72d
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Vendor URL: packages.debian.org/stable/games/luxman.html (Links to External Site)
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Cause:
Input validation error
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Underlying OS:
Linux (Debian)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Wed, 6 Nov 2002 18:10:06 +0100 (CET)
Subject: [SECURITY] [DSA 189-1] New luxman packages fix local root exploit
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- --------------------------------------------------------------------------
Debian Security Advisory DSA 189-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
November 6th, 2002 http://www.debian.org/security/faq
- --------------------------------------------------------------------------
Package : luxman
Vulnerability : local root exploit
Problem-Type : local
Debian-specific: yes
CVE Id : CAN-2002-1245
iDEFENSE reported about a vulnerability in LuxMan, a maze game for
GNU/Linux, similar to the PacMan arcade game. When successfully
exploited it a local attacker with read write access to the Memory,
leading to a local root compromise in many ways, examples of which
include scanning the file for fragments of the master password file
and modifying kernel memory to re-map system calls.
This problem has been fixed in version 0.41-17.1 the current stable
distribution (woody) and in version 0.41-19 for the unstable
distribution (sid). The old stable distribution (potato) is not
affected since it doesn't contain a luxman package
We recommend that you upgrade your luxman package immediately.
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
apt-get update
will update the internal database
apt-get upgrade
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 3.0 alias woody
- --------------------------------
This package is only available for the IA-32 architecture.
Source archives:
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41-17.1.dsc
Size/MD5 checksum: 570 6f07d15342abd605028d3cfde3dd1e6a
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41-17.1.diff.gz
Size/MD5 checksum: 6955 0ede91f130be23bd67383f47e6b51ccb
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41.orig.tar.gz
Size/MD5 checksum: 268279 aa389327578e2d65f3f5035193e407cb
Intel IA-32 architecture:
http://security.debian.org/pool/updates/main/l/luxman/luxman_0.41-17.1_i386.deb
Size/MD5 checksum: 290680 e9aa37d421068e828307ef5c816ad72d
These files will probably be moved into the stable distribution on
its next revision.
- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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