Denial of service in Microsoft Teams

1) Input validation error

EUVDB-ID: #VU60442

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-21965

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Teams. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Teams for iOS: All versions

Microsoft Teams Admin Center: All versions

Microsoft Teams for Android: All versions

CPE2.3

• cpe:2.3:a:microsoft:microsoft_teams_for_ios:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_teams_admin_center:*:*:*:*:*:*:*:
• cpe:2.3:a:microsoft:microsoft_teams_for_android:*:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21965

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

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