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UNIRAS Brief - 128/04 - Latest Bagle Variants Exploit Vulnerability


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   UNIRAS (UK Govt CERT) Briefing Notice - 128/04 dated 18.03.04  Time: 16:20  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Latest Bagle Variants Exploit Vulnerability


The latest Bagle variants, Q, R, S & T, do not rely on user interaction to spread. Instead an exploit of the Internet Explorer Object Data Remote Execution Vulnerability (see http://www.eeye.com/html/Research/Advisories/AD20030820.html) downloads a Visual Basic Script (VBScript) file with a .PHP extension from the web. This script is used to download a further VBScript file, which in turn downloads and executes the worm, sm.exe. The point to note is that the worm does not require user intervention in order to spread. However, the Internet Explorer Object Data Remote Execution Vulnerability has been patched by Microsoft (see http://www.microsoft.com/security/security_bulletins/ms03-040.asp). System administrators are advised to ensure that all instances of Microsoft Internet Explorer are patched against this vulnerability. Further information on the latest Bagle variants and removal details can be found at:





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UNIRAS wishes to acknowledge the contributions of F-Secure for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
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<End of UNIRAS Briefing>

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