Security Updates for Exchange (October 2020)

Medium Nessus Plugin ID 141491

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 3.6

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 :

- An information disclosure vulnerability exists in how Microsoft Exchange validates tokens when handling certain messages. An attacker who successfully exploited the vulnerability could use this to gain further information from a user. (CVE-2020-16969)

Solution

Microsoft has released KB4581424 to address this issue.

See Also

http://www.nessus.org/u?039d66e9

Plugin Details

Severity: Medium

ID: 141491

File Name: smb_nt_ms20_oct_exchange.nasl

Version: 1.3

Type: local

Agent: windows

Published: 2020/10/16

Updated: 2020/10/22

Dependencies: 57033, 77910

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2020-16969

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:exchange_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/10/13

Vulnerability Publication Date: 2020/10/13

Reference Information

CVE: CVE-2020-16969

MSKB: 4581424

MSFT: MS20-4581424

IAVA: 2020-A-0461