Debian: 'modutils' vulnerability |

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Debian Security Advisory                             [email protected]                         Wichert Akkerman
November 20, 2000
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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
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  Potato was released for the alpha, arm, i386, m68k, powerpc and sparc

  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$arch/ .

- -- 
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apt-get: deb stable/updates main
dpkg - dists/stable/updates/main
Mailing list: [email protected]

Debian: 'modutils' vulnerability

November 20, 2000
Sebastian Krahmer found a problem in the modprobe utility that could beexploited by local users to run arbitrary commands as root if themachine is running a kernel with kmod enable...



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