KB4571723: Windows 8.1 and Windows Server 2012 R2 August 2020 Security Update

high Nessus Plugin ID 139489
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 4571723 or cumulative update 4571703. It is, therefore, affected by multiple vulnerabilities :

- A remote code execution vulnerability exists when Windows Media Audio Codec improperly handles objects. An attacker who successfully exploited the vulnerability could take control of an affected system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit a malicious webpage. The security update addresses the vulnerability by correcting how Windows Media Audio Codec handles objects. (CVE-2020-1339)

- An elevation of privilege vulnerability exists when the Windows Telephony Server improperly handles memory.
(CVE-2020-1515)

- An information disclosure vulnerability exists when DirectWrite improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage.
The security update addresses the vulnerability by correcting how DirectWrite handles objects in memory.
(CVE-2020-1577)

- An information disclosure vulnerability exists in RPC if the server has Routing and Remote Access enabled. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system (CVE-2020-1383)

- An elevation of privilege vulnerability exists when the Windows Work Folders Service improperly handles memory.
(CVE-2020-1470, CVE-2020-1484, CVE-2020-1516)

- An elevation of privilege vulnerability exists when the Windows CSC Service improperly handles memory.
(CVE-2020-1489, CVE-2020-1513)

- An elevation of privilege vulnerability exists when Windows improperly handles hard links. An attacker who successfully exploited this vulnerability could overwrite a targeted file leading to an elevated status.
(CVE-2020-1467)

- A denial of service vulnerability exists in Windows Remote Desktop Gateway (RD Gateway) when an attacker connects to the target system using RDP and sends specially crafted requests. An attacker who successfully exploited this vulnerability could cause the RD Gateway service on the target system to stop responding.
(CVE-2020-1466)

- An elevation of privilege vulnerability exists in the Local Security Authority Subsystem Service (LSASS) when an authenticated attacker sends a specially crafted authentication request. A remote attacker who successfully exploited this vulnerability could cause an elevation of privilege on the target system's LSASS service. The security update addresses the vulnerability by changing the way that LSASS handles specially crafted authentication requests. (CVE-2020-1509)

- A remote code execution vulnerability exists when the Windows Font Driver Host improperly handles memory. An attacker who successfully exploited the vulnerability would gain execution on a victim system. The security update addresses the vulnerability by correcting how the Windows Font Driver Host handles memory. (CVE-2020-1520)

- An elevation of privilege vulnerability exists when the Windows UPnP Device Host improperly handles memory.
(CVE-2020-1519, CVE-2020-1538)

- An elevation of privilege vulnerability exists when the Windows Work Folder Service improperly handles file operations. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could exploit this vulnerability by running a specially crafted application on the victim system. The update addresses the vulnerability by correcting the way the Windows Work Folder Service handles file operations. (CVE-2020-1552)

- An elevation of privilege vulnerability exists when the Windows Kernel API improperly handles registry objects in memory. An attacker who successfully exploited the vulnerability could gain elevated privileges on a targeted system. A locally authenticated attacker could exploit this vulnerability by running a specially crafted application. The security update addresses the vulnerability by helping to ensure that the Windows Kernel API properly handles objects in memory.
(CVE-2020-1377, CVE-2020-1378)

- An information disclosure vulnerability exists when Media Foundation improperly handles objects in memory.
An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2020-1487)

- An elevation of privilege vulnerability exists when the Windows File Server Resource Management Service improperly handles memory. (CVE-2020-1517, CVE-2020-1518)

- An elevation of privilege vulnerability exists in the way that the dnsrslvr.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.
(CVE-2020-1584)

- An elevation of privilege vulnerability exists when the "Public Account Pictures" folder improperly handles junctions. (CVE-2020-1565)

- A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded. The update addresses the vulnerability by correcting how Windows validates file signatures.
(CVE-2020-1464)

- An elevation of privilege vulnerability exists when the Windows kernel fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.
An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2020-1486)

- An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network. (CVE-2020-1472)

- A memory corruption vulnerability exists when Windows Media Foundation improperly handles objects in memory.
An attacker who successfully exploited the vulnerability could install programs; view, change, or delete data; or create new accounts with full user rights. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit a malicious webpage. The security update addresses the vulnerability by correcting how Windows Media Foundation handles objects in memory. (CVE-2020-1379, CVE-2020-1477, CVE-2020-1478, CVE-2020-1492, CVE-2020-1554)

- An elevation of privilege vulnerability exists when the Windows Print Spooler service improperly allows arbitrary writing to the file system. An attacker who successfully exploited this vulnerability could run arbitrary code with elevated system privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2020-1337)

- An information disclosure vulnerability exists when the Windows Image Acquisition (WIA) Service improperly discloses contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system.
(CVE-2020-1474, CVE-2020-1485)

- An elevation of privilege vulnerability exists when the Windows Ancillary Function Driver for WinSock improperly handles memory. (CVE-2020-1587)

- A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2020-1473, CVE-2020-1557, CVE-2020-1558, CVE-2020-1564)

- A remote code execution vulnerability exists when Microsoft .NET Framework processes input. An attacker who successfully exploited this vulnerability could take control of an affected system. (CVE-2020-1046)

- A remote code execution vulnerability exists in the way that the MSHTML engine improperly validates input. An attacker could execute arbitrary code in the context of the current user. (CVE-2020-1567)

- An elevation of privilege vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user rights. (CVE-2020-1529)

- A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.
(CVE-2020-1380, CVE-2020-1570)

- An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files. (CVE-2020-1488)

- An elevation of privilege vulnerability exists when the Windows Function Discovery SSDP Provider improperly handles memory. (CVE-2020-1579)

- An elevation of privilege vulnerability exists when ASP.NET or .NET web applications running on IIS improperly allow access to cached files. An attacker who successfully exploited this vulnerability could gain access to restricted files. (CVE-2020-1476)

- A remote code execution vulnerability exists in the way that Microsoft Graphics Components handle objects in memory. An attacker who successfully exploited the vulnerability could execute arbitrary code on a target system. (CVE-2020-1562)

- An elevation of privilege vulnerability exists in the way that the srmsvc.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.
(CVE-2020-1475)

Solution

Apply Security Only update KB4571723 or Cumulative Update KB4571703.

See Also

https://support.microsoft.com/en-us/help/4571723/windows-8-1-update

https://support.microsoft.com/en-us/help/4571703/windows-8-1-update

Plugin Details

Severity: High

ID: 139489

File Name: smb_nt_ms20_aug_4571703.nasl

Version: 1.14

Type: local

Agent: windows

Published: 8/11/2020

Updated: 9/17/2021

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

Risk Information

CVSS Score Source: CVE-2020-1564

VPR

Risk Factor: Critical

Score: 10

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 8.1

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

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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: 8/11/2020

Vulnerability Publication Date: 8/11/2020

Exploitable With

Metasploit (Microsoft Spooler Local Privilege Elevation Vulnerability)

Reference Information

CVE: CVE-2020-1046, CVE-2020-1337, CVE-2020-1339, CVE-2020-1377, CVE-2020-1378, CVE-2020-1379, CVE-2020-1380, CVE-2020-1383, CVE-2020-1464, CVE-2020-1466, CVE-2020-1467, CVE-2020-1470, CVE-2020-1472, CVE-2020-1473, CVE-2020-1474, CVE-2020-1475, CVE-2020-1476, CVE-2020-1477, CVE-2020-1478, CVE-2020-1484, CVE-2020-1485, CVE-2020-1486, CVE-2020-1487, CVE-2020-1488, CVE-2020-1489, CVE-2020-1492, CVE-2020-1509, CVE-2020-1513, CVE-2020-1515, CVE-2020-1516, CVE-2020-1517, CVE-2020-1518, CVE-2020-1519, CVE-2020-1520, CVE-2020-1529, CVE-2020-1538, CVE-2020-1552, CVE-2020-1554, CVE-2020-1557, CVE-2020-1558, CVE-2020-1562, CVE-2020-1564, CVE-2020-1565, CVE-2020-1567, CVE-2020-1570, CVE-2020-1577, CVE-2020-1579, CVE-2020-1584, CVE-2020-1587

MSKB: 4571723, 4571703

MSFT: MS20-4571723, MS20-4571703

IAVA: 2020-A-0367-S, 2020-A-0438-S, 0001-A-0647, 2021-A-0431, 2021-A-0429