Linux Security
    Linux Security
    Linux Security

    Debian: New shorewall packages fix firewall bypass

    Date 08 Oct 2005
    Posted By Joe Shakespeare
    Updated package.
    - --------------------------------------------------------------------------
    Debian Security Advisory DSA 849-1                     This email address is being protected from spambots. You need JavaScript enabled to view it.                             Martin Schulze
    October 8th, 2005             
    - --------------------------------------------------------------------------
    Package        : shorewall
    Vulnerability  : programming error
    Problem type   : remote
    Debian-specific: no
    CVE ID         : CAN-2005-2317
    Debian Bug     : 318946
    "Supernaut" noticed that shorewall, the Shoreline Firewall, could
    generate an iptables configuration which is significantly more
    permissive than the rule set given in the shorewall configuration, if
    MAC verification are used in a non-default manner.
    When MACLIST_DISPOSITION is set to ACCEPT in the shorewall.conf file,
    all packets from hosts which fail the MAC verification pass through
    the firewall, without further checks.  When MACLIST_TTL is set to a
    non-zero value, packets from hosts which pass the MAC verification
    pass through the firewall, again without further checks.
    The old stable distribution (woody) is not affected by this problem.
    For the stable distribution (sarge) this problem has been fixed in
    version 2.2.3-2.
    For the unstable distribution (sid) this problem has been fixed in
    version 2.4.1-2.
    We recommend that you upgrade your shorewall 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:
          Size/MD5 checksum:      656 a280401e705da1a93b31e2b0d6abafb9
          Size/MD5 checksum:    34181 e6d35af167daece754b263fb77285960
          Size/MD5 checksum:   126841 df114b25a419d77915598de5844b423e
      Architecture independent components:
          Size/MD5 checksum:   151538 556f925a3f6393e1b7376686c1796d89
      These files will probably be moved into the stable distribution on
      its next update.
    - ---------------------------------------------------------------------------------
    For apt-get: deb stable/updates main
    For dpkg-ftp: dists/stable/updates/main
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.


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