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Windows Phone 7 does not check certificate Common Names when sending or receiving emails over SSL.

Vulnerability Note VU#389795

Original Release Date: 2012-09-17 | Last Revised: 2012-09-17

Overview

Windows Phone 7 does not check CN (Common Name) of server certificates when receiving or sending e-mails using POP3/IMAP/SMTP servers using SSL.

Description

Windows Phone 7 fails to check the CN (Common Name) of server certificates when receiving or sending e-mails using POP3/IMAP/SMTP servers using SSL allowing an attacker to perform a man-in-the-middle attack between the phone and the mail server.

Impact

A remote attacker with the ability to pose as a man-in-the-middle may be able to view the login or session data in the corresponding protocol (e.g., SMTP, POP3, etc.).

Solution

Microsoft has acknowledged this vulnerability and stated that they will be releasing an update.

Vendor Information

389795
 
Affected   Unknown   Unaffected

Microsoft Corporation

Notified:  June 19, 2012 Updated:  September 10, 2012

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.


CVSS Metrics

Group Score Vector
Base 5.4 AV:N/AC:H/Au:N/C:C/I:N/A:N
Temporal 4.4 E:POC/RL:U/RC:UC
Environmental 4.6 CDP:LM/TD:M/CR:ND/IR:ND/AR:ND

References

Acknowledgements

Thanks to the reporter that wishes to remain anonymous.

This document was written by Michael Orlando.

Other Information

CVE IDs: CVE-2012-2993
Date Public: 2012-09-17
Date First Published: 2012-09-17
Date Last Updated: 2012-09-17 11:58 UTC
Document Revision: 11

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