Security Updates for Exchange (March 2020)

medium Nessus Plugin ID 134376

Synopsis

The Microsoft Exchange Server installed on the remote host is missing a security update.

Description

The Microsoft Exchange Server installed on the remote host is missing a security update. It is, therefore, affected by the following vulnerability :

- A cross-site-scripting (XSS) vulnerability exists when Microsoft Exchange Server does not properly sanitize a specially crafted web request to an affected Exchange server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected server. The attacker who successfully exploited the vulnerability could then perform cross- site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions on the Exchange server on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user. The security update addresses the vulnerability by helping to ensure that Exchange Server properly sanitizes web requests. (CVE-2020-0903)

Solution

Microsoft has released KB4540123 to address this issue.

See Also

http://www.nessus.org/u?1c6ea048

Plugin Details

Severity: Medium

ID: 134376

File Name: smb_nt_ms20_mar_exchange.nasl

Version: 1.9

Type: local

Agent: windows

Published: 3/10/2020

Updated: 6/6/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.0

CVSS v2

Risk Factor: Low

Base Score: 3.5

Temporal Score: 2.6

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

CVSS Score Source: CVE-2020-0903

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

Vulnerability Information

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

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 3/10/2020

Vulnerability Publication Date: 3/10/2020

Reference Information

CVE: CVE-2020-0903

IAVA: 2020-A-0090-S

MSFT: MS20-4540123

MSKB: 4540123