Debian: 'modutils' vulnerability

    Date20 Nov 2000
    CategoryDebian
    2502
    Posted ByLinuxSecurity Advisories
    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 enabled.
    
    - ------------------------------------------------------------------------
    Debian Security Advisory                             This email address is being protected from spambots. You need JavaScript enabled to view it. 
    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:
        
    http://security.debian.org/dists/stable/updates/main/source/modutils_2.3.11-12.diff.gz
          MD5 checksum: 2c9590c014d74728c0c0aca54768a688
        
    http://security.debian.org/dists/stable/updates/main/source/modutils_2.3.11-12.dsc
          MD5 checksum: 19833dacf3eddfe651a33d95e82bb8c3
        
    http://security.debian.org/dists/stable/updates/main/source/modutils_2.3.11.orig.tar.gz
          MD5 checksum: f1214811d48ce3662d5957ee599c8057
    
      Alpha architecture:
        
    http://security.debian.org/dists/stable/updates/main/binary-alpha/modutils_2.3.11-12_alpha.deb
          MD5 checksum: 44ac46a4689bcbfe2f80ea1d4dcbbd6a
    
      ARM architecture:
        
    http://security.debian.org/dists/stable/updates/main/binary-arm/modutils_2.3.11-12_arm.deb
          MD5 checksum: 7f6608a182324509ed24e7289fe4e3cd
    
      Intel ia32 architecture:
        
    http://security.debian.org/dists/stable/updates/main/binary-i386/modutils_2.3.11-12_i386.deb
          MD5 checksum: 5050bd60fabb74e1814afc4f91b99e7f
    
      Motorola 680x0 architecture:
        
    http://security.debian.org/dists/stable/updates/main/binary-m68k/modutils_2.3.11-12_m68k.deb
          MD5 checksum: 0925f9813b4bd2627e9302b092fcefa0
    
      PowerPC architecture:
        
    http://security.debian.org/dists/stable/updates/main/binary-powerpc/modutils_2.3.11-12_powerpc.deb
          MD5 checksum: 5b469eb86dd396de058752c0c053b93d
    
      Sun Sparc architecture:
        
    http://security.debian.org/dists/stable/updates/main/binary-sparc/modutils_2.3.11-12_sparc.deb
          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
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