Spoofing attack in Microsoft Exchange Server - CVE-2017-11932

Vulnerability identifier: #VU9641

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-11932

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Microsoft Exchange Server

Install updates from vendor's website.

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11932
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV170023

• Spoofing attack in Microsoft Exchange OWA