USN-197-1: Shorewall vulnerability
Posted on: 10/10/2005 05:12 AM

A new Shorewall vulnerability update is available for Ubuntu Linux. Here the announcement:

Ubuntu Security Notice USN-197-1 October 10, 2005
shorewall vulnerability

A security issue affects the following Ubuntu releases:

Ubuntu 4.10 (Warty Warthog)
Ubuntu 5.04 (Hoary Hedgehog)

The following packages are affected:


The problem can be corrected by upgrading the affected package to
version 2.0.2-4ubuntu2.1 (for Ubuntu 4.10), or 2.0.13-1ubuntu0.1 (for
Ubuntu 5.04). In general, a standard system upgrade is sufficient to
effect the necessary changes.

Details follow:

A firewall bypass vulnerability has been found in shorewall. If
MACLIST_TTL was set to a value greater than 0 or MACLIST_DISPOSITION
was set to "ACCEPT" in /etc/shorewall/shorewall.conf, and a client was
positively identified through its MAC address, that client bypassed
all other policies/rules in place. This could allow external computers
to get access to ports that are intended to be restricted by the
firewall policy.

Please note that this does not affect the default configuration, which
does not enable MAC based client identification.

Updated packages for Ubuntu 4.10:

Source archives:
Size/MD5: 29530 7188d2c0672607fc760df58561794b41
Size/MD5: 666 dba831fba43c9826df27f162f7b3e658
Size/MD5: 104461 ea85fc5cab2d09bff04d368c3b20f3e1

Architecture independent packages:
Size/MD5: 109346 67800229efa15b34335898eba9d4e736

Updated packages for Ubuntu 5.04:

Source archives:
Size/MD5: 31259 0ce979721e9d9bf3e912665ec696be60
Size/MD5: 677 81a0a178e75b7fdd07ce9d27a329a727
Size/MD5: 104276 b3656ec857d55878b739d8f903de957d

Architecture independent packages:
Size/MD5: 125950 2971b9d2ebfbf1bf3ee3dd7d26d9fff0

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