Multiple vulnerabilities in Zoom clients

1) Man-in-the-Middle (MitM) attack

EUVDB-ID: #VU73695

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-22885

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to the way the Zoom client handles SMB shares. If a victim saves a local recording to an SMB location and later opens it using a link from Zoom’s web portal, an attacker positioned on an adjacent network to the victim client could set up a malicious SMB server to respond to client requests, causing the client to execute attacker controlled executables.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.4 11835

Zoom Client for Android: 5.0.1 23478.0429 - 5.13.4 11364

Zoom Client for macOS: 5.0.0 23186.0427 - 5.13.4 14461

Zoom Client for Linux: 5.1.418436.0628 - 5.13.4 711

Zoom Client for iOS: 5.0.0 23161.0427 - 5.13.4 6295

Zoom Rooms for Windows: 5.0.0 1420.0426 - 5.13.0 2301

Zoom Rooms for macOS: 5.0.0 2236.0426 - 5.13.0 2196

Virtual Desktop Infrastructure (VDI): 5.0.1 - 5.13.1

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23005

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

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.

2) Input validation error

EUVDB-ID: #VU73694

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-2023-22882

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 when parsing STUN packets. A remote attacker can send specially crafted UDP traffic to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.4 11835

Zoom Client for Android: 5.0.1 23478.0429 - 5.13.4 11364

Zoom Client for iOS: 5.0.0 23161.0427 - 5.13.4 6295

Zoom Client for Linux: 5.1.418436.0628 - 5.13.4 711

Zoom Client for macOS: 5.0.0 23186.0427 - 5.13.4 14461

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23002

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 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.

3) Input validation error

EUVDB-ID: #VU73693

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-2023-22881

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 when parsing STUN packets. A remote attacker can send specially crafted UDP traffic to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.4 11835

Zoom Client for Android: 5.0.1 23478.0429 - 5.13.4 11364

Zoom Client for iOS: 5.0.0 23161.0427 - 5.13.4 6295

Zoom Client for Linux: 5.1.418436.0628 - 5.13.4 711

Zoom Client for macOS: 5.0.0 23186.0427 - 5.13.4 14461

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23002

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 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.

4) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU77155

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28602

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper verification of cryptographic signature when upgrading Zoom. A remote attacker can downgrade Zoom Client components to previous versions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.4 11835

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23010

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 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.