Security Updates for Microsoft Exchange Server (December 2020)

critical Nessus Plugin ID 143557

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 remote code execution vulnerability. An attacker could exploit this to execute unauthorized arbitrary code. (CVE-2020-17117, CVE-2020-17132, CVE-2020-17141, CVE-2020-17142)

- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2020-17143)

Solution

Microsoft has released the following security updates to address this issue:
-KB4593465
-KB4593466

See Also

http://www.nessus.org/u?923093df

http://www.nessus.org/u?6a67cb27

Plugin Details

Severity: Critical

ID: 143557

File Name: smb_nt_ms20_dec_exchange.nasl

Version: 1.11

Type: local

Agent: windows

Published: 12/8/2020

Updated: 6/6/2024

Supported Sensors: Frictionless Assessment Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7.4

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

CVSS Score Source: CVE-2020-17117

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.4

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

CVSS Score Source: CVE-2020-17142

Vulnerability Information

CPE: cpe:/a:microsoft:exchange_server:2016, cpe:/a:microsoft:exchange_server:2019

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/8/2020

Vulnerability Publication Date: 12/8/2020

Exploitable With

Metasploit (Microsoft Exchange Server DlpUtils AddTenantDlpPolicy RCE)

Reference Information

CVE: CVE-2020-17117, CVE-2020-17132, CVE-2020-17141, CVE-2020-17142, CVE-2020-17143

IAVA: 2020-A-0554-S

MSFT: MS20-4593465, MS20-4593466

MSKB: 4593465, 4593466