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Debian Security Advisory: New version of modutils released

Nov 20, 2000, 20:20 (0 Talkback[s])
(Other stories by Wichert Akkerman)

Date: Mon, 20 Nov 2000 16:03:58 +0100
From: Wichert Akkerman wichert@soil.nl
To: debian-security-announce@lists.debian.org
Subject: [SECURITY] New version of modutils released

Debian Security Advisory                                        security@debian.org
http://www.debian.org/security/                                   Wichert Akkerman 
November 20, 2000

Package: modutils
Vulnerability: local exploit
Debian-specific: no
Sebastian Krahmer found a problem in the modprobe utility that could be exploited by local users to run arbitrary commands as root if the machine is running a kernel with kmod enabled.

The kmod kernel feature allows the kernel to dynamically load kernel modules if functionality is required that is not present in the running kernel. It does this by invoking the modprobe command with the requested module as parameter. This parameter can be influenced by users, for example by opening a currently non-existing files on a devfs filesystem, or trying to access a non-existing network interface. Since modprobe did not properly escape shell meta-characters when calling external commands or check if the last parameters was an option instead of a modulename, users can cause it to run arbitrary commands.

This has been fixed in version 2.3.11-12 and we recommend that you upgrade your modutils package immediately.

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.
You may use an automated update by adding the resources from the footer to the proper configuration.

Debian GNU/Linux 2.2 alias potato

Potato was released for the alpha, arm, i386, m68k, powerpc and sparc architectures.

Source archives:
MD5 checksum: 2c9590c014d74728c0c0aca54768a688
MD5 checksum: 19833dacf3eddfe651a33d95e82bb8c3
MD5 checksum: f1214811d48ce3662d5957ee599c8057

Alpha architecture:
MD5 checksum: 44ac46a4689bcbfe2f80ea1d4dcbbd6a

ARM architecture:
MD5 checksum: 7f6608a182324509ed24e7289fe4e3cd

Intel ia32 architecture:
MD5 checksum: 5050bd60fabb74e1814afc4f91b99e7f

Motorola 680x0 architecture:
MD5 checksum: 0925f9813b4bd2627e9302b092fcefa0

PowerPC architecture:
MD5 checksum: 5b469eb86dd396de058752c0c053b93d

Sun Sparc architecture:
MD5 checksum: 988da3bc5908fd6884201b8947f91608

For not yet released architectures please refer to the appropriate directory
ftp://ftp.debian.org/debian/dists/sid/binary-$arch/ .

apt-get: deb http://security.debian.org/ stable/updates main
dpkg-ftp:ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org

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