From security em unicamp.br  Thu Feb  8 14:58:02 2007
From: security em unicamp.br (CSIRT - UNICAMP)
Date: Thu, 8 Feb 2007 14:58:02 -0200
Subject: [SECURITY-L] [certbr-anuncios] Novo documento sobre Servidores DNS
	Recursivos Abertos
Message-ID: <20070208165802.GB61821@unicamp.br>

----- Forwarded message from "CERT.br" <cert em cert.br> -----

From: "CERT.br" <cert em cert.br>
Subject: [certbr-anuncios] Novo documento sobre Servidores DNS Recursivos
	Abertos
To: certbr-anuncios em listas.cert.br
Date: Wed, 7 Feb 2007 18:20:36 -0200
Organization: Computer Emergency Response Team Brazil

Está disponível, na área de whitepapers do CERT.br, um novo documento
para administradores de redes:

   * Recomendações para Evitar o Abuso de Servidores DNS Recursivos
     Abertos
     http://www.cert.br/docs/whitepapers/dns-recursivo-aberto/

O documento aborda os seguintes assuntos:

   * O que é um servidor DNS recursivo aberto e quais problemas ele
     acarreta para uma rede;
 
   * Possíveis soluções para o problema, abordando as seguintes
     plataformas: Unix com BIND 9, Servidores Microsoft e Mac OS X;
 
   * Técnicas de mitigação para aqueles que, por algum motivo, não
     possam implementar as soluções apresentadas;
 
   * Como testar se o servidor está corretamente configurado;
 
   * Características de um ataque abusando de servidores DNS
     recursivos abertos.

Atenciosamente,
--
CERT.br
<cert em cert.br>
http://www.cert.br/

_______________________________________________
certbr-anuncios mailing list
certbr-anuncios em listas.cert.br
https://listas.cert.br/mailman/listinfo/certbr-anuncios

----- End forwarded message -----


From security em unicamp.br  Wed Feb 14 10:29:41 2007
From: security em unicamp.br (CSIRT - UNICAMP)
Date: Wed, 14 Feb 2007 10:29:41 -0200
Subject: [SECURITY-L] US-CERT Technical Cyber Security Alert TA07-044A --
	Microsoft Updates for Multiple Vulnerabilities
Message-ID: <20070214122940.GC52500@unicamp.br>

----- Forwarded message from US-CERT Technical Alerts <technical-alerts em us-cert.gov> -----

From: US-CERT Technical Alerts <technical-alerts em us-cert.gov>
Subject: US-CERT Technical Cyber Security Alert TA07-044A -- Microsoft Updates for Multiple Vulnerabilities
To: technical-alerts em us-cert.gov
Date: Tue, 13 Feb 2007 14:46:45 -0500
Organization: US-CERT - +1 202-205-5266



-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

                    National Cyber Alert System

              Technical Cyber Security Alert TA07-044A


Microsoft Updates for Multiple Vulnerabilities

   Original release date: February 13, 2007
   Last revised: --
   Source: US-CERT


Systems Affected

     * Microsoft Windows
     * Microsoft Internet Explorer
     * Microsoft Office
     * Microsoft Works
     * Microsoft Malware Protection Engine
     * Microsoft Visual Studio
     * Microsoft Step-by-Step Interactive Training


Overview

   Microsoft has released updates that address critical vulnerabilities
   in Microsoft Windows, Internet Explorer, Office, Works, Malware
   Protection Engine, Visual Studio, and Step-by-Step Interactive
   Training. Exploitation of these vulnerabilities could allow a remote,
   unauthenticated attacker to execute arbitrary code or cause a denial
   of service on a vulnerable system.


I. Description

   Microsoft has released updates to address vulnerabilities that affect
   Microsoft Windows, Internet Explorer, Office, Works, Malware
   Protection Engine, Visual Studio, and Step-by-Step Interactive
   Training as part of the Microsoft Security Bulletin Summary for
   February 2007. The most severe vulnerabilities could allow a remote,
   unauthenticated attacker to execute arbitrary code or cause a denial
   of service on a vulnerable system.

   Some of the updates released for Microsoft Office address
   vulnerabilities that are actively being exploited. For more
   information, refer to the following Vulnerability Notes:

      http://www.kb.cert.org/vuls/byid?searchview&query=VU%23166700,VU%23996892,VU%23412225,VU%23613740 

   Further information about the vulnerabilities addressed by these
   updates is available in the Vulnerability Notes Database.


II. Impact

   A remote, unauthenticated attacker could execute arbitrary code on a
   vulnerable system. An attacker may also be able to cause a denial of
   service.


III. Solution

Apply updates from Microsoft

   Microsoft has provided updates for these vulnerabilities in the
   February 2007 Security Bulletins. The Security Bulletins describe any
   known issues related to the updates. Note any known issues described
   in the Bulletins and test for any potentially adverse effects in your
   environment.

   System administrators may wish to consider using an automated patch
   distribution system such as Windows Server Update Services (WSUS).


IV. References

     * US-CERT Vulnerability Notes for Microsoft February 2007 updates -
       <http://www.kb.cert.org/vuls/byid?searchview&query=ms07-feb>

     * Securing Your Web Browser -
       <http://www.us-cert.gov/reading_room/securing_browser/>

     * Microsoft Security Bulletin Summary for February 2007 -
       <http://www.microsoft.com/technet/security/bulletin/ms07-feb.mspx>

     * Microsoft Update - <https://update.microsoft.com/microsoftupdate/>

     * Microsoft Office Update - <http://officeupdate.microsoft.com/>

     * Known Microsoft Office vulnerabilities addressed in this release - 
       <http://www.kb.cert.org/vuls/byid?searchview&query=VU%23166700,VU%23996892,VU%23412225,VU%23613740>

     * Windows Server Update Services -
       <http://www.microsoft.com/windowsserversystem/updateservices/default.mspx>

 ____________________________________________________________________

   The most recent version of this document can be found at:

     <http://www.us-cert.gov/cas/techalerts/TA07-044A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert em cert.org> with "TA07-044A Feedback VU#753924" in the
   subject.
 ____________________________________________________________________

   For instructions on subscribing to or unsubscribing from this
   mailing list, visit <http://www.us-cert.gov/cas/signup.html>.
 ____________________________________________________________________

   Produced 2007 by US-CERT, a government organization.

   Terms of use:

     <http://www.us-cert.gov/legal.html>
 ____________________________________________________________________


Revision History

   February 13, 2007: Initial release


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From security em unicamp.br  Thu Feb 22 11:21:06 2007
From: security em unicamp.br (CSIRT - UNICAMP)
Date: Thu, 22 Feb 2007 11:21:06 -0200
Subject: [SECURITY-L] US-CERT Technical Cyber Security Alert TA07-050A --
	Sourcefire Snort DCE/RPC Preprocessor Buffer Overflow
Message-ID: <20070222132106.GC67269@unicamp.br>

----- Forwarded message from US-CERT Technical Alerts <technical-alerts em us-cert.gov> -----

From: US-CERT Technical Alerts <technical-alerts em us-cert.gov>
Subject: US-CERT Technical Cyber Security Alert TA07-050A -- Sourcefire Snort DCE/RPC Preprocessor Buffer Overflow
To: technical-alerts em us-cert.gov
Date: Mon, 19 Feb 2007 17:54:55 -0500
Organization: US-CERT - +1 202-205-5266


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


                     National Cyber Alert System

               Technical Cyber Security Alert TA07-050A


Sourcefire Snort DCE/RPC Preprocessor Buffer Overflow

   Original release date: February 19, 2007
   Last revised: --
   Source: US-CERT


Systems Affected

     * Snort 2.6.1, 2.6.1.1, and 2.6.1.2
     * Snort 2.7.0 beta 1
     * Sourcefire Intrusion Sensors version 4.1.x, 4.5.x, and 4.6x with
       SEUs prior to SEU 64
     * Sourcefire Intrusion Sensors for Crossbeam version 4.1.x, 4.5.x,
       and 4.6x with SEUs prior to SEU 64

   Other products that use Snort or Snort components may be affected.


Overview

   A stack buffer overflow vulnerability in the Sourcefire Snort
   DCE/RPC preprocessor could allow an unauthenticated, remote
   attacker to execute arbitrary code with the privileges of the Snort
   process.


I. Description

   Sourcefire Snort is a widely-deployed, open-source network
   intrusion detection system (IDS). Snort and its components are used
   in other IDS products, notably Sourcefire, and Snort is included
   with a number of operating system distributions. The DCE/RPC
   preprocessor reassembles fragmented SMB and DCE/RPC traffic before
   passing data to the Snort rules.

   The vulnerable code does not properly reassemble certain types of
   SMB and DCE/RPC packets. An attacker could exploit this
   vulnerability by sending a specially crafted TCP packet to a host
   or network monitored by Snort. The DCE/RPC preprocessor is enabled
   by default, and it is not necessary for an attacker to complete a
   TCP handshake.

   US-CERT is tracking this vulnerability as VU#196240. This
   vulnerability has been assigned CVE number CVE-2006-5276. Further
   information is available in advisories from Sourcefire and ISS.


II. Impact

   A remote, unauthenticated attacker may be able to execute arbitrary
   code with the privilege level of the Snort preprocessor.


III. Solution

Upgrade

   Snort 2.6.1.3 is available from the Snort download site. Sourcefire
   customers should visit the Sourcefire Support Login site.

Disable the DCE/RPC Preprocessor

   To disable the DCE/RPC preprocessor, comment out the line that loads
   the preprocessor in the Snort configuration file (typically
   /etc/snort.conf on UNIX and Linux systems):

     [/etc/snort.conf]
     ...
     #preprocessor dcerpc...
     ...
   
   Restart Snort for the change to take effect.

   Disabling the preprocessor will prevent Snort from reassembling
   fragmented SMB and DCE/RPC packets. This may allow attacks to evade
   the IDS.


IV. References

     * US-CERT Vulnerability Note VU#196240 -
       <http://www.kb.cert.org/vuls/id/196240>

     * Sourcefire Advisory 2007-02-19 -
       <http://www.snort.org/docs/advisory-2007-02-19.html>

     * Sourcefire Support Login - <https://support.sourcefire.com/>

     * Sourcefire Snort Release Notes for 2.6.1.3 -
       <http://www.snort.org/docs/release_notes/release_notes_2613.txt>

     * Snort downloads - <http://www.snort.org/dl/>

     * DCE/RPC Preprocessor -
       <http://www.snort.org/docs/snort_htmanuals/htmanual_261/node104.html>

     * IBM Internet Security Systems Protection Advisory -
       <http://iss.net/threats/257.html>

     * CVE-2006-5276 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2006-5276>


 ____________________________________________________________________

   The most recent version of this document can be found at:

     <http://www.us-cert.gov/cas/techalerts/TA07-050A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert em cert.org> with "TA07-050A Feedback VU#196240" in the
   subject.
 ____________________________________________________________________

   For instructions on subscribing to or unsubscribing from this
   mailing list, visit <http://www.us-cert.gov/cas/signup.html>.
 ____________________________________________________________________

   Produced 2007 by US-CERT, a government organization.

   Terms of use:

     <http://www.us-cert.gov/legal.html>
 ____________________________________________________________________


Revision History

   February 19, 2007:  Initial Release

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From security em unicamp.br  Thu Feb 22 11:20:34 2007
From: security em unicamp.br (CSIRT - UNICAMP)
Date: Thu, 22 Feb 2007 11:20:34 -0200
Subject: [SECURITY-L] US-CERT Technical Cyber Security Alert TA07-047A --
	Apple Updates for Multiple Vulnerabilities
Message-ID: <20070222132034.GB67269@unicamp.br>

----- Forwarded message from US-CERT Technical Alerts <technical-alerts em us-cert.gov> -----

From: US-CERT Technical Alerts <technical-alerts em us-cert.gov>
Subject: US-CERT Technical Cyber Security Alert TA07-047A -- Apple Updates for Multiple Vulnerabilities
To: technical-alerts em us-cert.gov
Date: Fri, 16 Feb 2007 18:54:49 -0500
Organization: US-CERT - +1 202-205-5266



-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

                        National Cyber Alert System

                  Technical Cyber Security Alert TA07-047A


Apple Updates for Multiple Vulnerabilities

   Original release date: February 16, 2007
   Last revised: --
   Source: US-CERT


Systems Affected

     * Apple Mac OS X version 10.3.x and 10.4.x
     * Apple Mac OS X Server version 10.3.x and 10.4.x
     * Apple iChat

   These vulnerabilities affect both Intel-based and PowerPC-based Apple
   systems.


Overview

   Apple has released Security Update 2007-002 to correct multiple
   vulnerabilities affecting Apple Mac OS X, Mac OS X Server, and iChat.
   The most serious of these vulnerabilities may allow a remote attacker
   to execute arbitrary code. Attackers may take advantage of the less
   serious vulnerabilities to bypass security restrictions or cause a
   denial of service.


I. Description

   Apple Security Update 2007-002 addresses a number of vulnerabilities
   affecting Apple Mac OS X, OS X Server, and iChat. Further details are
   available in the related vulnerability notes.

   The vulnerabilities addressed in this update were previously disclosed
   as part of the Month of Apple Bugs project.


II. Impact

   The impacts of these vulnerabilities vary. Potential consequences
   include remote execution of arbitrary code or commands, bypass of
   security restrictions, and denial of service.


III. Solution

Install Updates from Apple

   Install Apple Security Update 2007-002. This and other updates are
   available via Apple Update or via Apple Downloads.


IV. References

     * Vulnerability Notes for Apple Security Update 2007-002 -
       <http://www.kb.cert.org/vuls/byid?searchview&query=Apple-2007-002>

     * About the security content of Security Update 2007-002 -
       <http://docs.info.apple.com/article.html?artnum=305102>

     * Month of Apple Bugs - 
       <http://projects.info-pull.com/moab/index.html>

     * Mac OS X: Updating your software -
       <http://docs.info.apple.com/article.html?artnum=106704>

     * Apple Downloads - <http://www.apple.com/support/downloads/>

 ____________________________________________________________________

   The most recent version of this document can be found at:

     <http://www.us-cert.gov/cas/techalerts/TA07-047A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert em cert.org> with "TA07-047A Feedback VU#240880" in the
   subject.
 ____________________________________________________________________

   For instructions on subscribing to or unsubscribing from this
   mailing list, visit <http://www.us-cert.gov/cas/signup.html>.
 ____________________________________________________________________

   Produced 2007 by US-CERT, a government organization.

   Terms of use:

     <http://www.us-cert.gov/legal.html>
 ____________________________________________________________________


Revision History

   February 16, 2007: Initial release



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