Spoofing attack in Microsoft Exchange OWA

Published: 2017-12-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-11932
Exploitation vector Network
Public exploit N/A
Vulnerable software
Microsoft Exchange Server
Server applications / Mail servers

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Spoofing attack


Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11932

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No


The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to error in Outlook Web Access (OWA) in Microsoft Exchange Server when parsing HTTP requests. A remote attacker can perform script or content injection attacks, and attempt to trick the user into disclosing sensitive information.

Additionally Microsoft has released an update for Microsoft Exchange that provides enhanced security as a defense-in-depth measure.


Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2016 Cumulative Update 6 15.01.1034.026 - 2016 Cumulative Update 7 15.01.1261.035

External links


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.