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  3. Microsoft Exchange Server CVE-2014-6336 Tokens Validation URI Redirection Vulnerability

Microsoft Exchange Server CVE-2014-6336 Tokens Validation URI Redirection Vulnerability

Risk

Medium

Date Discovered

December 9, 2014

Description

Microsoft Exchange Server is prone to a URI-redirection vulnerability. An attacker can leverage this issue by constructing a crafted URI and enticing a user to follow it. When an unsuspecting victim follows the link, they may be redirected to an attacker-controlled site; this may aid in phishing attacks. Other attacks are possible. The following versions are affected: Microsoft Exchange Server 2013 Service Pack 1 Microsoft Exchange Server 2013 Cumulative Update 6

Technologies Affected

  • Microsoft Exchange Server 2013 Cumulative Update 6
  • Microsoft Exchange Server 2013 SP1

Recommendations

Block external access at the network boundary, unless external parties require service.

Filter access to the affected computer at the network boundary if global access isn't required. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to monitor network traffic for anomalous or suspicious activity. Monitor logs generated by NIDS and by the server itself for evidence of attacks against the server.

Permit privileged access for trusted individuals only.

Permitting access to vulnerable applications for trusted individuals only can reduce the risk of an exploit.
Updates are available. Please see the references or vendor advisory for more information.

Credits

Microsoft
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
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