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TUCoPS :: Web :: General :: esa2-009.txt

webalizer - webalizer contains a potentially exploitable buffer overflow.





+------------------------------------------------------------------------+
| EnGarde Secure Linux Security Advisory                  April 23, 2002 |
|  http://www.engardelinux.org/ ESA-20020423-009 |
|                                                                        |
| Package: webalizer                                                     |
| Summary: webalizer contains a potentially exploitable buffer overflow. |
+------------------------------------------------------------------------+

  EnGarde Secure Linux is a secure distribution of Linux that features
  improved access control, host and network intrusion detection, Web
  based secure remote management, complete e-commerce using AllCommerce,
  and integrated open source security tools.

OVERVIEW
--------
  There is a potentially exploitable buffer overflow in webalizer which
  could allow an attacker to compromise a host by spoofing reverse DNS
  queries.

DETAIL
------
  The Webalizer is a fast, free web server log file analysis program. It
  produces highly detailed, easily configurable usage reports in HTML
  format, for viewing with a standard web browser.

  Webalizer also has the ability to perform reverse DNS lookups.  An
  attacker with control over the victims DNS may spoof responses thus
  triggering a buffer overflow, potentially leading to a root compromise.

SOLUTION
--------
  Users of the EnGarde Professional edition can use the Guardian Digital
  Secure Network to update their systems automatically.

  EnGarde Community users should upgrade to the most recent version
  as outlined in this advisory.  Updates may be obtained from:

     ftp://ftp.engardelinux.org/pub/engarde/stable/updates/
http://ftp.engardelinux.org/pub/engarde/stable/updates/

Before upgrading the package, the machine must either:

    a) be booted into a "standard" kernel; or
    b) have LIDS disabled.

  To disable LIDS, execute the command:

    # /sbin/lidsadm -S -- -LIDS_GLOBAL

  To install the updated package, execute the command:

    # rpm -Uvh filename

  You must now update the LIDS configuration by executing the command:

    # /usr/sbin/config_lids.pl

  To re-enable LIDS (if it was disabled), execute the command:

    # /sbin/lidsadm -S -- +LIDS_GLOBAL

  To verify the signatures of the updated packages, execute the command:

    # rpm -Kv filename

UPDATED PACKAGES
----------------
  These updated packages are for EnGarde Secure Linux Community
  Edition.

  Source Packages:

    SRPMS/webalizer-2.01-1.0.4.src.rpm
      MD5 Sum: 4b182641716929e667b532b34143a56f

  Binary Packages:

    i386/webalizer-2.01-1.0.4.i386.rpm
      MD5 Sum: 26d607aa844675e643ac1cbb37c66363

    i686/webalizer-2.01-1.0.4.i686.rpm
      MD5 Sum: 5da5952a4d1ff859e4d96b9d8ab02793

REFERENCES
----------
  Guardian Digital's public key:
     http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY

Credit for the discovery of this bug goes to:
    Spybreak <spybreak@host.sk>

The Webalizer's Official Web Site:
     http://www.webalizer.org/

Security Contact:    security@guardiandigital.com
EnGarde Advisories:  http://www.engardelinux.org/advisories.html

--------------------------------------------------------------------------
$Id: ESA-20020423-009-webalizer,v 1.1 2002/04/23 16:46:06 rwm Exp $
--------------------------------------------------------------------------
Author: Ryan W. Maple, <ryan@guardiandigital.com>
Copyright 2002, Guardian Digital, Inc.


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