Vulnerability CVE-2020-16957

Vulnerability Name:

CVE-2020-16957 (CCN-189072)

Assigned:

2020-10-13

Published:

2020-10-13

Updated:

2020-10-20

Summary:

A remote code execution vulnerability exists when the Microsoft Office Access Connectivity Engine improperly handles objects in memory, aka 'Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability'.

CVSS v3 Severity:

7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
6.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

9.3 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-noinfo

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2020-16957

Source: XF
Type: UNKNOWN
ms-office-cve202016957-code-exec(189072)

Source: CCN
Type: Microsoft Security TechCenter - October 2020
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

Source: MISC
Type: Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16957

Vulnerable Configuration:

Configuration 1:

cpe:/a:microsoft:365_apps:-:*:*:*:*:*:*:*

OR cpe:/a:microsoft:office:2019:*:*:*:*:-:*:*

Configuration CCN 1:

cpe:/a:microsoft:office:2019:*:~~~click-to-run~~:*:*:*:x32:*

OR cpe:/a:microsoft:office:2019:*:*:*:click-to-run:*:x64:*

Denotes that component is vulnerable

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