Security Updates for Exchange (September 2019)

Critical Nessus Plugin ID 128707

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 :

- A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web App (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 the vulnerability could be used as a pivot to chain an attack with other vulnerabilities in web services. (CVE-2019-1266)

- A denial of service vulnerability exists in Microsoft Exchange Server software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could cause a remote denial of service against a system. Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Exchange server. The security update addresses the vulnerability by correcting how Microsoft Exchange Server handles objects in memory. (CVE-2019-1233)

Solution

Microsoft has released KB4515832 to address this issue.

See Also

http://www.nessus.org/u?fe045c39

Plugin Details

Severity: Critical

ID: 128707

File Name: smb_nt_ms19_sep_exchange.nasl

Version: 1.2

Type: local

Agent: windows

Published: 2019/09/11

Updated: 2019/09/13

Dependencies: 57033, 77910

Risk Information

Risk Factor: Critical

CVSS Score Source: CVE-2019-1233

CVSS v2.0

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS v3.0

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/a:microsoft:exchange_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Patch Publication Date: 2019/09/10

Vulnerability Publication Date: 2019/09/10

Reference Information

CVE: CVE-2019-1233, CVE-2019-1266

MSKB: 4515832

MSFT: MS19-4515832

IAVA: 2019-A-0337