Remote code execution in Microsoft Outlook

1) Code Injection

EUVDB-ID: #VU53879

Risk: Medium

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-31949

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the Microsoft Outlook. A remote authenticated attacker can trick a victim to open a specially crafted file or visit a malicious website and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019

Microsoft Outlook: 2013 RT Service Pack 1 - 2016

CPE2.3

• cpe:2.3:a:microsoft:microsoft_office:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_outlook:2013_RT_Service_Pack_1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_outlook:2013_Service_Pack_1:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_outlook:*:*:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31949

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.