July 22nd, 2002, 01:12 PM
Vulnerability: Microsoft Outlook Express SMTP Over TLS Information Disclosure
Microsoft Outlook Express is a mail client for the Microsoft Windows operating system. Outlook Express includes support for secure SMTP communications using TLS, as defined in RFC 2487.
Under TLS, it is possible for a client and server to successfully negotiate an encrypted connection without authentication. In this case, transmitted data will be properly encrypted, but the identity of the client and server are not securely defined.
Reportedly, Outlook Express does not report this condition to the end user. Sensitive information may be disclosed to a malicious server as the SMTP conversation continues, including SMTP AUTH credentials.
This behavior has been reported in Outlook Express. It is possible, however, that additional SMTP clients share this behavior.
July 22nd, 2002, 01:20 PM
Any known counter measures or we must wait for the Patch?
July 22nd, 2002, 01:38 PM
hmmm well a patch should be soon published.. however this vuln is just a theory.. once its practically done and proved.. MS will issue a patch
July 22nd, 2002, 04:19 PM
Thank you.....tons of fun