#VU8291 Information disclosure in Microsoft Exchange Server - CVE-2017-11761
Published: September 12, 2017 / Updated: September 12, 2017
Vulnerability identifier: #VU8291
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-11761
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to improper input sanitization issue in Microsoft Exchange. A remote attacker can send Calendar-related messages containing specially crafted tags to an Exchange server, trick the victim into observing telemetry from these requests and discerning properties of internal hosts intended to be hidden from the Internet, and identify the existence of RFC1918 addresses on the local network from a client on the Internet.
Remediation
Install updates from vendor's website.