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Microsoft CVE-2017-11932: Microsoft Exchange Spoofing Vulnerability

Severity CVSS Published Added Modified
6 (AV:N/AC:M/Au:N/C:P/I:P/A:N) December 12, 2017 December 12, 2017 May 16, 2018

Description

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests. An attacker who successfully exploited the vulnerability could perform script or content injection attacks, and attempt to trick the user into disclosing sensitive information. An attacker could also redirect the user to a malicious website that could spoof content or be used as a pivot to chain an attack with other vulnerabilities in web services. To exploit the vulnerability, an attacker could send a specially crafted email containing a malicious link to a user. An attacker could also use a chat client to social engineer a user into clicking the malicious link. However, in both examples the user must click the malicious link. The security update addresses the vulnerability by correcting how OWA validates web requests.

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References

Solution Reference

Microsoft Security Update Guide

Solution

msft-kb4045655-40b42c1b-086f-4e4a-b020-000abcdc89c7