12937 : Microsoft Office Encrypted Document RC4 Implementation Weakness
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Info

Last Modified
6 months ago

Percent Complete
95%

Disclosure
Jan 11, 2005

Discovery
Unknown

Dates

Exploit
Unknown

Solution
Unknown

Description

 Office contains a flaw that may lead to an unauthorized information disclosure. The issue is triggered when the initialization vector is re-used when encrypting Word and Excel files, which will cause the resulting keystreams to be vulnerable to cryptanalysis resulting in a loss of confidentiality.

Classification

 Location: Unknown Location
Attack Type: Cryptographic
Impact: Loss of Confidentiality
Exploit: Exploit Rumored / Private

Solution

 Currently, there are no known upgrades, patches, or workarounds available to correct this issue.

Products
Microsoft Corporation
Watch-list
Office
Watch-list
 95
97
2000
XP
2003

References

Credit
  • Hongun Wu - hongjunBrand New Doo Dooi2r.a-star.edu.sg - Institute for Infocomm Research, Singapore

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