Rapid7 Vulnerability & Exploit Database

Microsoft CVE-2017-11761: Microsoft Exchange Information Disclosure Vulnerability

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Microsoft CVE-2017-11761: Microsoft Exchange Information Disclosure Vulnerability

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
09/12/2017
Created
07/25/2018
Added
09/12/2017
Modified
08/22/2019

Description

An input sanitization issue exists with Microsoft Exchange that could potentially result in unintended Information Disclosure. An attacker who successfully exploited the vulnerability could identify the existence of RFC1918 addresses on the local network from a client on the Internet. An attacker could use this internal host information as part of a larger attack. To exploit the vulnerability, an attacker could include specially crafted tags in Calendar-related messages sent to an Exchange server. These specially-tagged messages could prompt the Exchange server to fetch information from internal servers. By observing telemetry from these requests, a client could discern properties of internal hosts intended to be hidden from the Internet. The update corrects the way that Exchange parses Calendar-related messages.

Solution(s)

  • msft-kb4045655-40b42c1b-086f-4e4a-b020-000abcdc89c7
  • msft-kb4045655-b367a79a-108c-4b30-8a3c-064da05f8514

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
  • Lightweight Endpoint Agent
  • Live Dashboards
  • Real Risk Prioritization
  • IT-Integrated Remediation Projects
  • Cloud, Virtual, and Container Assessment
  • Integrated Threat Feeds
  • Easy-to-Use RESTful API
  • Automation-Assisted Patching
  • Automated Containment
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;