Multiple vulnerabilities in Zoom client for Windows

Published: 2023-06-12

Risk	High
Patch available	YES
Number of vulnerabilities	6
CVE-ID	CVE-2023-34114 CVE-2023-34121 CVE-2023-34120 CVE-2023-34113 CVE-2023-34122 CVE-2023-28601
CWE-ID	CWE-668 CWE-20 CWE-269 CWE-345 CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Zoom Client for Windows Client/Desktop applications / Office applications
Vendor	Zoom Video Communications, Inc.

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Exposure of Resource to Wrong Sphere

EUVDB-ID: #VU77168

Risk: Low

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

CVE-ID: CVE-2023-34114

CWE-ID: CWE-668 - Exposure of resource to wrong sphere

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote user can gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.11 13434

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23016

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.

2) Input validation error

EUVDB-ID: #VU77161

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34121

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.11 13434

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23013

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) Improper privilege management

EUVDB-ID: #VU77159

Risk: Low

CVSSv3.1: 6.8 [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]

CVE-ID: CVE-2023-34120

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper privilege management. A local user can utilize higher level system privileges maintained by the Zoom client to spawn processes with escalated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.11 13434

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23012

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Insufficient verification of data authenticity

EUVDB-ID: #VU77157

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34113

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

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

The vulnerability exists due to insufficient verification of data authenticity. A remote attacker can execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.11 13434

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23015

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.

5) Input validation error

EUVDB-ID: #VU77156

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34122

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied input. A local user can escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.11 13434

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23014

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

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.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

6) Buffer overflow

EUVDB-ID: #VU77154

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28601

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary. A remote attacker can trigger memory corruption 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

Zoom Client for Windows: 5.0.0 23168.0427 - 5.13.11 13434

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23009

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.