SB2022052417 - Multiple vulnerabilities in Zoom Client

Description

This security bulletin contains information about 4 vulnerabilities.

1) Improper validation of certificate with host mismatch (CVE-ID: CVE-2022-22787)

CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to software fails to properly validate the hostname during a server switch request. A remote attacker can perform a man-in-the-middle (MitM) attack.

2) Reliance on Untrusted Inputs in a Security Decision (CVE-ID: CVE-2022-22786)

CWE-ID: CWE-807 - Reliance on Untrusted Inputs in a Security Decision

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to improper checking of the currently installed software version when performing software update. A remote attacker can trick the victim into installing an older software version.

3) Information disclosure (CVE-ID: CVE-2022-22785)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to Zoom client fails to properly constrain client session cookies to Zoom domains. A remote attacker can force unsuspecting users send Zoom-scoped session cookies to a non-Zoom domain and perform spoofing of a Zoom user.

4) XML injection (CVE-ID: CVE-2022-22784)

CWE-ID: CWE-91 - XML Injection

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper input validation when processing XML data inside XMPP messages. A remote attacker can send a specially crafted chat message to break out of the current XMPP message context and spoof messages from other application users or from server.

Remediation

Install update from vendor's website.

References

• https://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-22009
• https://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-22008
• https://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-22007
• https://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-22006