Vulnerability Note VU#389795

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

Original Release date: 17 Sep 2012 | Last revised: 17 Sep 2012

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 (Learn More)

VendorStatusDate NotifiedDate Updated
Microsoft CorporationAffected19 Jun 201210 Sep 2012
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

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

Credit

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: 17 Sep 2012
  • Date First Published: 17 Sep 2012
  • Date Last Updated: 17 Sep 2012
  • Document Revision: 11

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