KB5005095: Windows Server 2008 Security Update (August 2021)

critical Nessus Plugin ID 152425
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

The remote Windows host is missing security update 5005095 or cumulative update 5005090. 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-2021-26424, CVE-2021-34533, CVE-2021-36936, CVE-2021-36937, CVE-2021-36947)

- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-36942)

- An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges.
(CVE-2021-26425, CVE-2021-34483, CVE-2021-34484, CVE-2021-36927)

Solution

Apply Security Only update KB5005095 or Cumulative Update KB5005090.

See Also

http://www.nessus.org/u?de72daa6

http://www.nessus.org/u?910509c6

Plugin Details

Severity: Critical

ID: 152425

File Name: smb_nt_ms21_aug_5005095.nasl

Version: 1.8

Type: local

Agent: windows

Published: 8/10/2021

Updated: 11/30/2021

Dependencies: smb_check_rollup.nasl, smb_hotfixes.nasl, ms_bulletin_checks_possible.nasl

Risk Information

CVSS Score Source: CVE-2021-36936

VPR

Risk Factor: Critical

Score: 9.8

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:H/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

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

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

Vulnerability Information

CPE: cpe:/o:microsoft:windows

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/10/2021

Vulnerability Publication Date: 8/10/2021

Reference Information

CVE: CVE-2021-26424, CVE-2021-26425, CVE-2021-34481, CVE-2021-34483, CVE-2021-34484, CVE-2021-34533, CVE-2021-36927, CVE-2021-36936, CVE-2021-36937, CVE-2021-36942, CVE-2021-36947

MSKB: 5005095, 5005090

MSFT: MS21-5005095, MS21-5005090

IAVA: 2021-A-0373-S, 2021-A-0374-S