[SECURITY-L] CAIS-Alerta: Vulnerabilidade no Active Directory (MS08-003)

[CSIRT - UNICAMP]

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From: Centro de Atendimento a Incidentes de Seguranca <cais em cais.rnp.br>
Subject:  CAIS-Alerta: Vulnerabilidade no Active Directory (MS08-003)
To: pop-seg em cais.rnp.br, rnp-alerta em cais.rnp.br, rnp-seg em cais.rnp.br
Date: Tue, 12 Feb 2008 17:53:45 -0200 (BRST)

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Prezados,

O CAIS esta' repassando o alerta da Microsoft, intitulado "MS08-003 - 
Vulnerability in Active Directory Could Allow Denial of Service (946538)", 
que trata de uma vulnerabilidade recem-descoberta no Active Directory.

A vulnerabilidade existe devido a validacao incorreta de solicitacoes LDAP 
especialmente montadas. Caso um atacante consiga explorar com sucesso esta 
vulnerabilidade, ele podera levar o sistema a uma condicao de negacao de 
servico (DoS).

Esta vulnerabilidade tambem esta presente em implementacoes do Active 
Directory Application Mode (ADAM) quando instalado em Windows XP e Windows 
Server 2003.

O Active Directory e' responsavel por centralizar a autenticacao e 
autorizacao para servicos entre computadores que utilizam o Microsoft 
Windows e LDAP (Lightweight Directory Access Protocol) e' um protocolo 
para acesso ao Active Directory.


Sistemas afetados:

. Microsoft Windows 2000 Server Service Pack 4 (Active Directory)
. Windows XP Professional Service Pack 2 (ADAM)
. Windows XP Professional x64 Edition (ADAM)
. Windows XP Professional Edition Service Pack 2 (ADAM)
. Windows Server 2003 Service Pack 1 (Active Directory)
. Windows Server 2003 Service Pack 2 (Active Directory)
. Windows Server 2003 Service Pack 1 (ADAM)
. Windows Server 2003 Service Pack 2 (ADAM)
. Windows Server 2003 x64 Edition (Active Directory)
. Windows Server 2003 x64 Edition Service Pack 2 (Active Directory)
. Windows Server 2003 x64 Edition (ADAM)
. Windows Server 2003 x64 Edition Service Pack 2 (ADAM)
. Windows Server 2003 com SP1 para sistemas baseados em Itanium (Active Directory)
. Windows Server 2003 com SP2 para sistemas baseados em Itanium (Active Directory)


Correcoes disponiveis:

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

. Microsoft Windows 2000 Server Service Pack 4 (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=9df0875d-0466-4974-b4c0-1ecc777173b1

. Windows XP Professional Service Pack 2 (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=bff7dcb9-5d00-442e-b03c-ce923d213faa

. Windows XP Professional x64 Edition (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=36e36e1a-ed0d-45a6-b707-766fabc01fbd

. Windows XP Professional Edition Service Pack 2 (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=36e36e1a-ed0d-45a6-b707-766fabc01fbd

. Windows Server 2003 Service Pack 1 (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=63d3d784-f057-4686-b85e-ab5fbab5a722

. Windows Server 2003 Service Pack 2 (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=63d3d784-f057-4686-b85e-ab5fbab5a722

. Windows Server 2003 Service Pack 1 (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=60781cf3-7c6d-4795-a9d0-bc18ee356e94

. Windows Server 2003 Service Pack 2 (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=60781cf3-7c6d-4795-a9d0-bc18ee356e94

. Windows Server 2003 x64 Edition (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=60781cf3-7c6d-4795-a9d0-bc18ee356e94

. Windows Server 2003 x64 Edition Service Pack 2 (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=60781cf3-7c6d-4795-a9d0-bc18ee356e94

. Windows Server 2003 x64 Edition (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=5e97698d-8150-44f9-9d34-87a0db6ba5a7

. Windows Server 2003 x64 Edition Service Pack 2 (ADAM)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=5e97698d-8150-44f9-9d34-87a0db6ba5a7

. Windows Server 2003 com SP1 para sistemas baseados em Itanium (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=eda8af09-1a4c-4163-a8bb-97dacdebeae4

. Windows Server 2003 com SP2 para sistemas baseados em Itanium (Active Directory)
  http://www.microsoft.com/downloads/details.aspx?FamilyID=eda8af09-1a4c-4163-a8bb-97dacdebeae4


Mais informacoes:

. MS08-003 - Vulnerability in Active Directory Could Allow Denial of Service (946538)
  http://www.microsoft.com/technet/security/bulletin/ms08-003.mspx

. SANS ISC Handler's Diary 2008-02-12: February Black Tuesday overview
  http://isc.incidents.org/diary.html?storyid=3973

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

. 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-2008-0088


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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