Detections
Analytics

Security Updates for Exchange (July 2021)

high Nessus Plugin ID 151664

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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:

- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-31196, CVE-2021-31206)

- An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges. (CVE-2021-33768, CVE-2021-34470)

Note: Nessus is unable to determine if the latest Active Directory schema has been applied.

Solution

Microsoft has released the following KBs to address these issues:
 - KB5003611
 - KB5003612
 - KB5004778
 - KB5004779
 - KB5004780

See Also

http://www.nessus.org/u?a44a0d8a

http://www.nessus.org/u?4f529b54

http://www.nessus.org/u?ecec1115

http://www.nessus.org/u?51a55048

http://www.nessus.org/u?c76ecd10

Plugin Details

Severity: High

ID: 151664

File Name: smb_nt_ms21_jul_exchange.nasl

Version: 1.11

Type: local

Agent: windows

Published: 7/15/2021

Updated: 8/21/2024

Supported Sensors: Frictionless Assessment Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: High

Base Score: 7.9

Temporal Score: 6.9

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

CVSS Score Source: CVE-2021-31206

CVSS v3

Risk Factor: High

Base Score: 8

Temporal Score: 7.6

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

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

CVSS Score Source: CVE-2021-34470

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: 7/13/2021

Vulnerability Publication Date: 7/13/2021

CISA Known Exploited Vulnerability Due Dates: 9/11/2024

Reference Information

CVE: CVE-2021-31196, CVE-2021-31206, CVE-2021-33768, CVE-2021-34470

IAVA: 2021-A-0315-S

MSFT: MS21-5003611, MS21-5003612, MS21-5004778, MS21-5004779, MS21-5004780

MSKB: 5003611, 5003612, 5004778, 5004779, 5004780