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             AUSCERT External Security Bulletin Redistribution

                          ESB-2007.0505 -- [Win]
         MS07-040 - Vulnerabilities in .NET Framework Could Allow
                           Remote Code Execution
                               11 July 2007

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Microsoft .NET Framework 1.0
                      Microsoft .NET Framework 1.1
                      Microsoft .NET Framework 2.0
Publisher:            Microsoft
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
                      Read-only Data Access
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-0041 CVE-2007-0042 CVE-2007-0043

Original Bulletin:
  http://www.microsoft.com/technet/security/Bulletin/ms07-040.mspx

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MS07-040 - Vulnerabilities in .NET Framework Could Allow Remote Code Execution

Affected Software:
   - Microsoft .NET Framework 1.0
   - Microsoft .NET Framework 1.1
   - Microsoft .NET Framework 2.0

Non-Affected Software:
   - Microsoft .NET Framework 3.0

Full MS07-040 Advisory:
   http://www.microsoft.com/technet/security/Bulletin/ms07-040.mspx

Vulnerability Details

.NET PE Loader Vulnerability - CVE-2007-0041

A remote code execution vulnerability exists in .NET Framework that could
allow an attacker who successfully exploited this vulnerability to make
changes to the system with the permissions of the logged-on user. If a user
is logged in with administrative user rights, an attacker could take complete
control of the affected system. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user rights.
Users whose accounts are configured to have fewer user rights on the system
could be less impacted than users who operate with administrative user rights.


ASP.NET Null Byte Termination Vulnerability - CVE-2007-0042

An information disclosure vulnerability exists in .NET Framework that could
allow an attacker who successfully exploited this vulnerability to bypass the
security features of an ASP.NET Web site to download the contents of any Web
page.


.NET JIT Compiler Vulnerability - CVE-2007-0043

A remote code execution vulnerability exists in .NET Framework Just In Time
Compiler that could allow an attacker who successfully exploited this
vulnerability to make changes to the system with the permissions of the
logged-on user. If a user is logged on with administrative user rights, an
attacker could take complete control of the affected system. An attacker
could then install programs; view, change, or delete data; or create new
accounts with full user rights. Users whose accounts are configured to have
fewer user rights on the system could be less impacted than users who operate
with administrative user rights.

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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