[SECURITY-L] CAIS-Alerta: Atualizacao de Seguranca para ActiveX (MS08-023)

Qua Abr 9 09:19:15 -03 2008

----- Forwarded message from Centro de Atendimento a Incidentes de Seguranca <cais em cais.rnp.br> -----

From: Centro de Atendimento a Incidentes de Seguranca <cais em cais.rnp.br>
Subject:  CAIS-Alerta: Atualizacao de Seguranca para ActiveX (MS08-023)
To: pop-seg em cais.rnp.br, rnp-alerta em cais.rnp.br, rnp-seg em cais.rnp.br
Date: Tue, 8 Apr 2008 17:18:10 -0300 (BRT)

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Prezados,

O CAIS esta' repassando o alerta da Microsoft, intitulado "MS08-023 - 
Security Update of ActiveX Kill Bits (948881)", que trata de uma 
atualizacao de seguranca para o um controle ActiveX e aplicacao de 
"kill-bit" para controles ActiveX de terceiros.

Existe uma vulnerabilidade na forma como o controle ActiveX "hxvz.dll" 
gerencia memoria, que se explorada, pode permitir ao atacante executar 
codigo malicioso no sistema vulneravel. Se explorada, a vulnerabilidade 
permite ao atacante obter as mesmas permissoes de acesso do usuario 
conectado. Se este usuario tiver permissoes de administrador, o atacante 
podera obter o controle total sobre o sistema.

A segunda atualizacao desabilita, atraves da ativacao de um "kill-bit" 
(modificacao no registro), o funcionamento do controle ActiveX "Yahoo! 
Music Jukebox" no Internet Explorer. Este controle contem uma 
vulnerabilidade reportada pelo Yahoo recentemente.

Sistemas afetados:

. Microsoft Windows 2000 Service Pack 4
  componente: Microsoft Internet Explorer 5.01 Service Pack 4
. Microsoft Windows 2000 Service Pack 4
  componente: Microsoft Internet Explorer 6 Service Pack 1
. Windows XP Service Pack 2
. Windows XP Professional x64 Edition
. Windows XP Professional x64 Edition Service Pack 2
. Windows Server 2003 Service Pack 1
. Windows Server 2003 Service Pack 2
. Windows Server 2003 x64 Edition
. Windows Server 2003 x64 Edition Service Pack 2
. Windows Server 2003 com SP1 para sistemas baseados em Itanium
. Windows Server 2003 com SP2 para sistemas baseados em Itanium
. Windows Vista
. Windows Vista Service Pack 1
. Windows Vista x64 Edition
. Windows Vista x64 Edition Service Pack 1
. Windows Server 2008 para sistemas 32-bits
. Windows Server 2008 para sistemas x64
. Windows Server 2008 para sistemas baseados em Itanium

Correcoes disponiveis:

Recomenda-se fazer a atualizacao para as versoes disponiveis em :

. Microsoft Windows 2000 Service Pack 4
  componente: Microsoft Internet Explorer 5.01 Service Pack 4
  http://www.microsoft.com/downloads/details.aspx?FamilyId=0395451F-B719-4F71-A7B4-403D0C7E8FCC

. Microsoft Windows 2000 Service Pack 4
  componente: Microsoft Internet Explorer 6 Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?FamilyId=BA6D3AEB-E35A-47CC-BACE-7BD9D58A9D3F

. Windows XP Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?FamilyId=9DBF002F-FE53-4CC7-A430-35F45C520D10

. Windows XP Professional x64 Edition
  http://www.microsoft.com/downloads/details.aspx?FamilyId=01400970-DF68-4DAF-AA39-2FC4F969974C

. Windows XP Professional x64 Edition Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?FamilyId=01400970-DF68-4DAF-AA39-2FC4F969974C

. Windows Server 2003 Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?FamilyId=AD384FEA-53BE-4BE3-8ACB-1CD23A7F5405

. Windows Server 2003 Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?FamilyId=AD384FEA-53BE-4BE3-8ACB-1CD23A7F5405

. Windows Server 2003 x64 Edition
  http://www.microsoft.com/downloads/details.aspx?FamilyId=FFC5C893-CB24-4875-B0A7-6D5C7AA4D642

. Windows Server 2003 x64 Edition Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?FamilyId=FFC5C893-CB24-4875-B0A7-6D5C7AA4D642

. Windows Server 2003 com SP1 para sistemas baseados em Itanium
  http://www.microsoft.com/downloads/details.aspx?FamilyId=94CF78D3-B6C3-41BC-993E-3AF3BE0D70F1

. Windows Server 2003 com SP2 para sistemas baseados em Itanium
  http://www.microsoft.com/downloads/details.aspx?FamilyId=94CF78D3-B6C3-41BC-993E-3AF3BE0D70F1

. Windows Vista
  http://www.microsoft.com/downloads/details.aspx?FamilyId=D7F14001-7F42-4CA0-9193-CDF061179B59

. Windows Vista Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?FamilyId=D7F14001-7F42-4CA0-9193-CDF061179B59

. Windows Vista x64 Edition
  http://www.microsoft.com/downloads/details.aspx?FamilyId=D33462B6-7391-482D-BABE-FB4CD0BEAA21

. Windows Vista x64 Edition Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?FamilyId=D33462B6-7391-482D-BABE-FB4CD0BEAA21

. Windows Server 2008 para sistemas 32-bits
  http://www.microsoft.com/downloads/details.aspx?FamilyId=95691924-2813-4A86-9E11-99D853F8E606

. Windows Server 2008 para sistemas x64
  http://www.microsoft.com/downloads/details.aspx?FamilyId=920AE29B-19D0-4089-AC79-F2DA824A2256

. Windows Server 2008 para sistemas baseados em Itanium
  http://www.microsoft.com/downloads/details.aspx?FamilyId=66DF79AC-8364-4922-9688-EBC7EC76D89F

Mais informacoes:

. MS08-023 - Security Update of ActiveX Kill Bits (948881)
  http://www.microsoft.com/technet/security/Bulletin/MS08-023.mspx

. Yahoo! Music Jukebox Security Update
  http://help.yahoo.com/l/us/yahoo/music/jukebox/troubleshoot/securityupdate.html

. Microsoft Brasil Security
  http://www.microsoft.com/brasil/security

. SANS ISC Handler's Diary 2008-04-08: April 2008 - Black Tuesday Overview
  http://www.isc.sans.org/diary.html?storyid=4264

. Technet Brasil - Central de Seguranca
  http://www.technetbrasil.com.br/seguranca

. Windows Live OneCare
  http://safety.live.com/site/pt-BR/default.htm

Identificador CVE (http://cve.mitre.org): CVE-2008-1086

O CAIS recomenda que os administradores mantenham seus sistemas e 
aplicativos sempre atualizados, de acordo com as ultimas versoes e 
correcoes oferecidas pelos fabricantes.

Os Alertas do CAIS tambem sao oferecidos no formato RSS/RDF:
http://www.rnp.br/cais/alertas/rss.xml

Atenciosamente,

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