Remote code execution in Microsoft Skype for Business and Lync

1) Input validation error

EUVDB-ID: #VU65212

Risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33633

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in Skype for Business and Lync. A remote administrator can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Skype for Business Server: 2015 CU12 - 2019 CU6

Lync Server: 2013 CU10

CPE2.3

• cpe:2.3:a:microsoft:skype_for_business_server:2015:CU12:*:*:*:*:*:
• cpe:2.3:a:microsoft:skype_for_business_server:2019:CU6:*:*:*:*:*:
• cpe:2.3:a:microsoft:lync_server:2013:CU10:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-33633

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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