[SECURITY-L] CAIS-Alerta: Vulnerabilidade no GDI (MS08-021)

Qua Abr 9 09:18:27 -03 2008

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From: Centro de Atendimento a Incidentes de Seguranca <cais em cais.rnp.br>
Subject:  CAIS-Alerta: Vulnerabilidade no GDI (MS08-021)
To: pop-seg em cais.rnp.br, rnp-alerta em cais.rnp.br, rnp-seg em cais.rnp.br
Date: Tue, 8 Apr 2008 17:17:05 -0300 (BRT)

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Prezados,

O CAIS esta' repassando o alerta da Microsoft, intitulado "MS08-021 - 
Vulnerability in GDI Could Allow Remote Code Execution (948590)", que 
trata de duas vulnerabilidades identificadas na biblioteca GDI (Graphics 
Rendering Engine).

A primeira vulnerabilidade afeta as funcoes que executam calculos 
numericos ao tentar abrir arquivos de imagem no formato EMF ou WMF. A 
segunda vulnerabilidade e' causada por um erro de estouro de buffer ao 
tentar abrir arquivos de imagem no formato EMF.

Ambas vulnerabilidades podem ser exploradas se o usuario for convencido a 
abrir um arquivo especialmente criado, permitindo ao atacante executar 
codigo malicioso no sistema vulneravel, com as mesmas permissoes do 
usuario conectado. Se o usuario tiver permissoes de administrador, o 
atacante podera obter o controle total sobre o sistema.

Sistemas afetados:

. Microsoft Windows 2000 Service Pack 4
. Microsoft Windows XP Service Pack 2
. Microsoft Windows XP Professional x64 Edition
. Microsoft Windows XP Professional x64 Edition Service Pack 2
. Microsoft Windows Server 2003 Service Pack 1
. Microsoft Windows Server 2003 Service Pack 2
. Microsoft Windows Server 2003 x64 Edition
. Microsoft Windows Server 2003 x64 Edition Service Pack 2
. Microsoft Windows Server 2003 com Service Pack 1 para sistemas baseados em Itanium
. Microsoft Windows Server 2003 com Service Pack 2 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
  http://www.microsoft.com/downloads/details.aspx?familyid=caac000a-22b6-48cb-aa00-1a0bfe886de2

. Microsoft Windows XP Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?familyid=c2763dd8-a03e-4a48-aa86-a7ec00250a7a

. Microsoft Windows XP Professional x64 Edition
  http://www.microsoft.com/downloads/details.aspx?familyid=166f2ab5-913c-47a9-86fe-b814797b751e

. Microsoft Windows XP Professional x64 Edition Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?familyid=166f2ab5-913c-47a9-86fe-b814797b751e

. Microsoft Windows Server 2003 Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?familyid=bee91d80-d49a-4d3d-82d6-d5aa63f54979

. Microsoft Windows Server 2003 Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?familyid=bee91d80-d49a-4d3d-82d6-d5aa63f54979

. Microsoft Windows Server 2003 x64 Edition
  http://www.microsoft.com/downloads/details.aspx?familyid=e3dde449-e062-4ce0-a9f4-433bff23e224

. Microsoft Windows Server 2003 x64 Edition Service Pack 2
  http://www.microsoft.com/downloads/details.aspx?familyid=e3dde449-e062-4ce0-a9f4-433bff23e224

. Microsoft Windows Server 2003 com Service Pack 1 para sistemas baseados em Itanium
  http://www.microsoft.com/downloads/details.aspx?familyid=7886a802-f2b5-489c-b14b-631f4c4c0742

. Microsoft Windows Server 2003 com Service Pack 2 para sistemas baseados em Itanium
  http://www.microsoft.com/downloads/details.aspx?familyid=7886a802-f2b5-489c-b14b-631f4c4c0742

. Windows Vista
  http://www.microsoft.com/downloads/details.aspx?familyid=9b51deb8-3873-4146-977f-7e3d0840a4c5

. Windows Vista Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?familyid=9b51deb8-3873-4146-977f-7e3d0840a4c5

. Windows Vista x64 Edition
  http://www.microsoft.com/downloads/details.aspx?familyid=4ad6dcd1-6ea5-43bf-8bee-a5f507beadc6

. Windows Vista x64 Edition Service Pack 1
  http://www.microsoft.com/downloads/details.aspx?familyid=4ad6dcd1-6ea5-43bf-8bee-a5f507beadc6

. Windows Server 2008 para sistemas 32-bits
  http://www.microsoft.com/downloads/details.aspx?familyid=006d5c47-53e6-4ee1-932c-497611804938

. Windows Server 2008 para sistemas x64
  http://www.microsoft.com/downloads/details.aspx?familyid=b7771a4a-4e4f-48d1-8551-bb8b778ca5a7

. Windows Server 2008 para sistemas baseados em Itanium
  http://www.microsoft.com/downloads/details.aspx?familyid=b7771a4a-4e4f-48d1-8551-bb8b778ca5a7

Mais informacoes:

. MS08-021 - Vulnerabilities in GDI Could Allow Remote Code Execution (948590)
  http://www.microsoft.com/technet/security/bulletin/ms08-021.mspx

. MS07-046 - Vulnerability in GDI Could Allow Remote Code Execution (938829)
  http://www.microsoft.com/technet/security/bulletin/ms07-046.mspx

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

. 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-2008-1087, CVE-2008-1083

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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