Debian: New unalz packages fix arbitrary code execution

    Date30 Jan 2006
    CategoryDebian
    5150
    Posted ByLinuxSecurity Advisories
    Ulf H�rnhammer from the Debian Audit Project discovered that unalz, a decompressor for ALZ archives, performs insufficient bounds checking when parsing file names. This can lead to arbitrary code execution if an attacker provides a crafted ALZ archive.
    - --------------------------------------------------------------------------
    Debian Security Advisory DSA 959-1                     This email address is being protected from spambots. You need JavaScript enabled to view it.
    http://www.debian.org/security/                             Martin Schulze
    January 30th, 2006                      http://www.debian.org/security/faq
    - --------------------------------------------------------------------------
    
    Package        : unalz
    Vulnerability  : buffer overflow
    Problem-Type   : local (remote)
    Debian-specific: no
    CVE ID         : CVE-2005-3862
    Debian Bug     : 340842
    
    Ulf H�rnhammer from the Debian Audit Project discovered that unalz, a
    decompressor for ALZ archives, performs insufficient bounds checking
    when parsing file names.  This can lead to arbitrary code execution if
    an attacker provides a crafted ALZ archive.
    
    The old stable distribution (woody) does not contain unalz.
    
    For the stable distribution (sarge) this problem has been fixed in
    version 0.30.1
    
    For the unstable distribution (sid) this problem will be fixed soon.
    
    We recommend that you upgrade your unalz package.
    
    
    Upgrade Instructions
    - --------------------
    
    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 3.1 alias sarge
    - --------------------------------
    
      Source archives:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1.dsc
          Size/MD5 checksum:      505 6946e7c6ae2e663674cb968a17517d6b
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1.tar.gz
          Size/MD5 checksum:   108993 9b45066980a87f11db43f24b0756be33
    
      Alpha architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_alpha.deb
          Size/MD5 checksum:    54350 5cf460c260a651fa6c48a39a350fea19
    
      AMD64 architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_amd64.deb
          Size/MD5 checksum:    47924 21585b3182e29c28c4871bd75d2b8565
    
      ARM architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_arm.deb
          Size/MD5 checksum:    49050 7e2bb36975ff0f6e601be3c4ac5de5a9
    
      Intel IA-32 architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_i386.deb
          Size/MD5 checksum:    42794 c9ca20d6840ca8381eee1dcfa34ad89a
    
      Intel IA-64 architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_ia64.deb
          Size/MD5 checksum:    77534 4e626bf47842d551ed1761336259fcfe
    
      HP Precision architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_hppa.deb
          Size/MD5 checksum:    51558 34d2c5c50af71e9ade2c3b608041cbc5
    
      Motorola 680x0 architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_m68k.deb
          Size/MD5 checksum:    42514 747eeb6b49dc1c7e43f6d0e4034fa2c7
    
      Big endian MIPS architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_mips.deb
          Size/MD5 checksum:    54364 9e797dbb849cbe5f65f61d5e052902e5
    
      Little endian MIPS architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_mipsel.deb
          Size/MD5 checksum:    53938 aef1b01344791cdefed5f837b66bf9aa
    
      PowerPC architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_powerpc.deb
          Size/MD5 checksum:    45412 621dafe9070b461d0f86655a1dda9507
    
      IBM S/390 architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_s390.deb
          Size/MD5 checksum:    49970 2f6a285270fcd8084f9e2948e87ebfc4
    
      Sun Sparc architecture:
    
        http://security.debian.org/pool/updates/main/u/unalz/unalz_0.30.1_sparc.deb
          Size/MD5 checksum:    46612 2142655456c03385e69d156a7831005c
    
    
      These files will probably be moved into the stable distribution on
      its next update.
    
    - ---------------------------------------------------------------------------------
    For apt-get: deb http://security.debian.org/ stable/updates main
    For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
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