Detections
Analytics
Security Updates for Exchange (September 2017)
medium Nessus Plugin ID 103139
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Synopsis
The Microsoft Exchange Server installed on the remote host is affected by multiple vulnerabilities.Description
The Microsoft Exchange Server installed on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities :- An elevation of privilege vulnerability exists when Microsoft Exchange Outlook Web Access (OWA) fails to properly handle web requests. An attacker who successfully exploited this vulnerability could perform script/content injection attacks and attempt to trick the user into disclosing sensitive information. To exploit the vulnerability, an attacker could send a specially crafted email message containing a malicious link to a user. Alternatively, an attacker could use a chat client to social engineer a user into clicking the malicious link. The security update addresses the vulnerability by correcting how Microsoft Exchange validates web requests. Note: In order to exploit this vulnerability, a user must click a maliciously crafted link from an attacker. (CVE-2017-8758)
- 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. (CVE-2017-11761)
Solution
Microsoft has released the following security updates to address this issue:-KB4036108
See Also
Plugin Details
Severity: Medium
ID: 103139
File Name: smb_nt_ms17_sep_exchange.nasl
Version: 1.15
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 9/12/2017
Updated: 11/21/2025
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.0
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2017-11761
CVSS v3
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2017-8758
Vulnerability Information
CPE: cpe:/a:microsoft:exchange_server:2016
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/12/2017
Vulnerability Publication Date: 9/12/2017
Exploitable With
Metasploit (Microsoft Exchange ProxyShell RCE)
Reference Information
CVE: CVE-2017-11761, CVE-2017-8758
MSFT: MS17-4036108