[logs] [ESA-20020423-009] webalizer contains a potentially exploitable buffer overflow (fwd)

From: Tina Bird (tbird@precision-guesswork.com)
Date: Tue Apr 23 2002 - 11:30:07 PDT

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    Boy -- who'd've expected two buffer overflows in log
    analysis programs within a month?
    
    ---------- Forwarded message ----------
    Date: Tue, 23 Apr 2002 13:07:29 -0400 (EDT)
    From: EnGarde Secure Linux <securityat_private>
    To: engarde-securityat_private, bugtraqat_private
    Subject: [ESA-20020423-009] webalizer contains a potentially exploitable
        buffer overflow
    
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    +------------------------------------------------------------------------+
    | 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 <spybreakat_private>
    
      The Webalizer's Official Web Site:
        http://www.webalizer.org/
    
      Security Contact:    securityat_private
      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, <ryanat_private> 
    Copyright 2002, Guardian Digital, Inc.
    
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