Security Updates for Internet Explorer (June 2021)

high Nessus Plugin ID 152587
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 Internet Explorer installation on the remote host is missing a security update.

Description

The Internet Explorer installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerabilities:

- A memory corruption error exists in the scripting engine. An unauthenticated, remote attacker can exploit this to execute arbitrary commands. (CVE-2021-31959)

- A security bypass vulnerability exists in the HTML platforms component. An unauthenticated, remote attacker can exploit this to bypass security in order to gain full access to the system. (CVE-2021-31971)

Solution

Microsoft has released the following security updates to address this issue:
-KB5003636
-KB5003661
-KB5003667
-KB5003671
-KB5003697

See Also

https://support.microsoft.com/en-us/topic/5003636

https://support.microsoft.com/en-us/topic/5003661

https://support.microsoft.com/en-us/topic/5003667

https://support.microsoft.com/en-us/topic/5003671

https://support.microsoft.com/en-us/topic/5003697

Plugin Details

Severity: High

ID: 152587

File Name: smb_nt_ms21_jun_internet_explorer.nasl

Version: 1.2

Type: local

Agent: windows

Published: 8/16/2021

Updated: 8/18/2021

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

Risk Information

CVSS Score Source: CVE-2021-31971

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.4

Vector: CVSS:3.0/AV:N/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:/a:microsoft:ie

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/8/2021

Vulnerability Publication Date: 6/8/2021

Reference Information

CVE: CVE-2021-31959, CVE-2021-31971

MSKB: 5003636, 5003661, 5003667, 5003671, 5003697

MSFT: MS21-5003636, MS21-5003661, MS21-5003667, MS21-5003671, MS21-5003697