Symptoms

Consider the following scenario:

  • You create a Microsoft .NET Framework 3.5-based application on a computer that is running Windows 7 or Windows Server 2008 R2.

  • The application passes a zero-length byte array to¬†the ICryptoTransform.TransformFinalBlock¬†API to perform a cryptographic operation. For example, you use the API to encrypt or decrypt data.

In this scenario, the application crashes. Additionally, an error message that resembles the following is logged in the event log:

Source: .NET Runtime

Event ID: 1023

Event Data: .NET Runtime version '<2.0.50727.xxxx>' - Fatal Execution Engine Error ('<000007FEFxxxxxxx>') (80131506)

Cause

This issue occurs because the ICryptoTransform.TransformFinalBlock API does not handle the zero-length byte array parameter correctly in the .NET Framework 3.5-based application. Therefore, this results in an unhandled Access Violation exception, which causes the application to crash.

Resolution

Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website:

http://support.microsoft.com/contactus/?ws=supportNote In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

To apply this hotfix, you must have the .NET Framework 3.5 Service Pack 1 (SP1) installed on a computer that is running one of the following operating systems:

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2 Service Pack 1 (SP1)

Restart requirement

You do not have to restart the computer after you apply this hotfix if .NET Framework-related files are not being used.

File information

The global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

For all supported x86-based versions of Windows 7 SP1

File name

File version

File size

Date

Time

Platform

Big5.nlp

Not Applicable

66,728

12-Nov-2010

23:43

Not Applicable

Bopomofo.nlp

Not Applicable

82,172

12-Nov-2010

23:43

Not Applicable

Ksc.nlp

Not Applicable

116,756

12-Nov-2010

23:45

Not Applicable

Mscorlib.dll

2.0.50727.5719

4,550,656

07-Feb-2012

23:33

x86

Normidna.nlp

Not Applicable

59,342

12-Nov-2010

23:45

Not Applicable

Normnfc.nlp

Not Applicable

45,794

12-Nov-2010

23:45

Not Applicable

Normnfd.nlp

Not Applicable

39,284

12-Nov-2010

23:45

Not Applicable

Normnfkc.nlp

Not Applicable

66,384

12-Nov-2010

23:45

Not Applicable

Normnfkd.nlp

Not Applicable

60,294

12-Nov-2010

23:45

Not Applicable

Prc.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Prcp.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Sortkey.nlp

Not Applicable

262,148

12-Nov-2010

23:45

Not Applicable

Sorttbls.nlp

Not Applicable

20,320

12-Nov-2010

23:45

Not Applicable

Xjis.nlp

Not Applicable

28,288

12-Nov-2010

23:45

Not Applicable

Mscordacwks.dll

2.0.50727.5719

990,480

07-Feb-2012

23:33

x86

Mscorwks.dll

2.0.50727.5719

5,925,648

07-Feb-2012

23:33

x86

Sos.dll

2.0.50727.5719

389,888

07-Feb-2012

23:34

x86

For all supported x64-based versions of Windows 7 SP1 and of Windows Server 2008 R2 SP1

File name

File version

File size

Date

Time

Platform

Big5.nlp

Not Applicable

66,728

12-Nov-2010

23:43

Not Applicable

Bopomofo.nlp

Not Applicable

82,172

12-Nov-2010

23:43

Not Applicable

Ksc.nlp

Not Applicable

116,756

12-Nov-2010

23:44

Not Applicable

Mscorlib.dll

2.0.50727.5719

4,567,040

07-Feb-2012

23:32

x64

Normidna.nlp

Not Applicable

59,342

12-Nov-2010

23:44

Not Applicable

Normnfc.nlp

Not Applicable

45,794

12-Nov-2010

23:44

Not Applicable

Normnfd.nlp

Not Applicable

39,284

12-Nov-2010

23:44

Not Applicable

Normnfkc.nlp

Not Applicable

66,384

12-Nov-2010

23:44

Not Applicable

Normnfkd.nlp

Not Applicable

60,294

12-Nov-2010

23:44

Not Applicable

Prc.nlp

Not Applicable

83,748

12-Nov-2010

23:44

Not Applicable

Prcp.nlp

Not Applicable

83,748

12-Nov-2010

23:44

Not Applicable

Sortkey.nlp

Not Applicable

262,148

12-Nov-2010

23:44

Not Applicable

Sorttbls.nlp

Not Applicable

20,320

12-Nov-2010

23:44

Not Applicable

Xjis.nlp

Not Applicable

28,288

12-Nov-2010

23:44

Not Applicable

Mscordacwks.dll

2.0.50727.5719

1,756,432

07-Feb-2012

23:32

x64

Mscorwks.dll

2.0.50727.5719

9,991,952

07-Feb-2012

23:32

x64

Sos.dll

2.0.50727.5719

486,144

07-Feb-2012

23:32

x64

Big5.nlp

Not Applicable

66,728

12-Nov-2010

23:43

Not Applicable

Bopomofo.nlp

Not Applicable

82,172

12-Nov-2010

23:43

Not Applicable

Ksc.nlp

Not Applicable

116,756

12-Nov-2010

23:45

Not Applicable

Mscorlib.dll

2.0.50727.5719

4,550,656

07-Feb-2012

23:33

x86

Normidna.nlp

Not Applicable

59,342

12-Nov-2010

23:45

Not Applicable

Normnfc.nlp

Not Applicable

45,794

12-Nov-2010

23:45

Not Applicable

Normnfd.nlp

Not Applicable

39,284

12-Nov-2010

23:45

Not Applicable

Normnfkc.nlp

Not Applicable

66,384

12-Nov-2010

23:45

Not Applicable

Normnfkd.nlp

Not Applicable

60,294

12-Nov-2010

23:45

Not Applicable

Prc.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Prcp.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Sortkey.nlp

Not Applicable

262,148

12-Nov-2010

23:45

Not Applicable

Sorttbls.nlp

Not Applicable

20,320

12-Nov-2010

23:45

Not Applicable

Xjis.nlp

Not Applicable

28,288

12-Nov-2010

23:45

Not Applicable

Mscordacwks.dll

2.0.50727.5719

990,480

07-Feb-2012

23:33

x86

Mscorwks.dll

2.0.50727.5719

5,925,648

07-Feb-2012

23:33

x86

Sos.dll

2.0.50727.5719

389,888

07-Feb-2012

23:34

x86

For all supported Itanium-based versions of Windows 7 SP1 and of Windows Server 2008 R2 SP1

File name

File version

File size

Date

Time

Platform

Big5.nlp

Not Applicable

66,728

12-Nov-2010

23:45

Not Applicable

Bopomofo.nlp

Not Applicable

82,172

12-Nov-2010

23:45

Not Applicable

Ksc.nlp

Not Applicable

116,756

12-Nov-2010

23:45

Not Applicable

Mscorlib.dll

2.0.50727.5719

4,009,984

07-Feb-2012

23:25

IA-64

Normidna.nlp

Not Applicable

59,342

12-Nov-2010

23:45

Not Applicable

Normnfc.nlp

Not Applicable

45,794

12-Nov-2010

23:45

Not Applicable

Normnfd.nlp

Not Applicable

39,284

12-Nov-2010

23:45

Not Applicable

Normnfkc.nlp

Not Applicable

66,384

12-Nov-2010

23:45

Not Applicable

Normnfkd.nlp

Not Applicable

60,294

12-Nov-2010

23:45

Not Applicable

Prc.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Prcp.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Sortkey.nlp

Not Applicable

262,148

12-Nov-2010

23:45

Not Applicable

Sorttbls.nlp

Not Applicable

20,320

12-Nov-2010

23:45

Not Applicable

Xjis.nlp

Not Applicable

28,288

12-Nov-2010

23:46

Not Applicable

Mscordacwks.dll

2.0.50727.5719

3,083,536

07-Feb-2012

23:25

IA-64

Mscorwks.dll

2.0.50727.5719

20,343,568

07-Feb-2012

23:25

IA-64

Sos.dll

2.0.50727.5719

873,728

07-Feb-2012

23:25

IA-64

Big5.nlp

Not Applicable

66,728

12-Nov-2010

23:43

Not Applicable

Bopomofo.nlp

Not Applicable

82,172

12-Nov-2010

23:43

Not Applicable

Ksc.nlp

Not Applicable

116,756

12-Nov-2010

23:45

Not Applicable

Mscorlib.dll

2.0.50727.5719

4,550,656

07-Feb-2012

23:33

x86

Normidna.nlp

Not Applicable

59,342

12-Nov-2010

23:45

Not Applicable

Normnfc.nlp

Not Applicable

45,794

12-Nov-2010

23:45

Not Applicable

Normnfd.nlp

Not Applicable

39,284

12-Nov-2010

23:45

Not Applicable

Normnfkc.nlp

Not Applicable

66,384

12-Nov-2010

23:45

Not Applicable

Normnfkd.nlp

Not Applicable

60,294

12-Nov-2010

23:45

Not Applicable

Prc.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Prcp.nlp

Not Applicable

83,748

12-Nov-2010

23:45

Not Applicable

Sortkey.nlp

Not Applicable

262,148

12-Nov-2010

23:45

Not Applicable

Sorttbls.nlp

Not Applicable

20,320

12-Nov-2010

23:45

Not Applicable

Xjis.nlp

Not Applicable

28,288

12-Nov-2010

23:45

Not Applicable

Mscordacwks.dll

2.0.50727.5719

990,480

07-Feb-2012

23:33

x86

Mscorwks.dll

2.0.50727.5719

5,925,648

07-Feb-2012

23:33

x86

Sos.dll

2.0.50727.5719

389,888

07-Feb-2012

23:34

x86

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

For more information about the ICryptoTransform interface, visit the following MSDN website:

Information about the ICryptoTransform interface

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