CVE-2022-28766 outlines a DLL injection vulnerability affecting Windows 32-bit versions of the Zoom Client for Meetings and Zoom Rooms, both of which are susceptible prior to version 5.12.6. This vulnerability allows a local low-privileged user to run arbitrary code within the context of the Zoom client. The severity of this vulnerability is classified as low, with a CVSS score of 3.3, indicating that while the risk exists, it is not deemed critical.
Understanding this vulnerability's context is crucial for organizations using Zoom products. The potential for exploitation may lead to unauthorized actions within the application, which could impact user confidentiality. Although the attack vector is local and requires low privileges, it still poses a notable risk, especially in environments where multiple users share access.
As of now, there are no public exploits confirmed for this vulnerability, and it has not been included in the Known Exploited Vulnerabilities (KEV) catalog. However, organizations should remain vigilant and consider this vulnerability within their broader security posture.
Organizations should prioritize patching this vulnerability as part of their ongoing security updates, particularly given the risk it poses from local users who may have access to the Zoom client.
Vulnerability Details
The official description for CVE-2022-28766 states that Windows 32-bit versions of the Zoom Client for Meetings before 5.12.6 and Zoom Rooms for Conference Room before version 5.12.6 are susceptible to a DLL injection vulnerability. This issue is classified under CWE-94 (Code Injection) and CWE-427 (Uncontrolled Search Path Element).
The CVSS score from NVD is 7.3, indicating a high severity level, while Zoom's score reflects a lower risk perception at 3.3. The variation in scoring is due to differing interpretations of the vulnerability's potential impact and exploitation complexity.
The vulnerability affects the following products: meetings and rooms. The publication date for this vulnerability was November 17, 2022.
Technical Analysis
The root cause of CVE-2022-28766 is a failure in input validation, allowing a low-privileged user to inject malicious DLLs into the application. The attack vector is local, meaning that the attacker must have access to the local system where the Zoom client is installed.
The attack complexity is low, as it does not require advanced skills or resources. The privileges required are also low, making it accessible to users with minimal system access. No user interaction is needed for this vulnerability to be exploited, allowing for silent exploitation.
In terms of impacts, the confidentiality impact is low, meaning that sensitive information is not directly exposed. However, the integrity impact is none, and there is no availability impact, as this vulnerability does not cause a denial of service.
Risk & Impact Analysis
Risk to organizations includes potential unauthorized code execution, which could lead to various malicious activities, such as data manipulation or unauthorized access to sensitive functionalities within the Zoom client. While the severity is classified as low, the risk posed by a local user exploiting this vulnerability should not be overlooked.
The blast radius is limited to the individual user’s context within the Zoom application; however, in a multi-user environment, the ability for one user to inject code could have cascading effects, depending on the application’s permissions and configuration.
Given the CVSS score of 3.3, organizations should address this vulnerability in their priority patch cycle, ensuring that all users are updated to version 5.12.6 or later as soon as possible.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions are all Windows 32-bit versions of the Zoom Client for Meetings and Zoom Rooms before 5.12.6. Organizations should ensure that they upgrade to version 5.12.6 or later to mitigate this vulnerability.
Mitigation & Remediation
Organizations should upgrade to the latest version of the Zoom Client for Meetings and Zoom Rooms to resolve this vulnerability. The patch is available in version 5.12.6 and later. If immediate upgrading is not possible, consider restricting local access to the application or implementing additional monitoring to detect unusual activity within the application.
For further security assessments, organizations may consider utilizing application security assessments to identify other potential vulnerabilities within their systems.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor for unusual DLL loading activities within the Zoom application. Log indicators include any attempts to load unsigned DLLs or unexpected file modifications in the application directory.
Behavioral anomalies such as unexpected application crashes or performance degradation may also indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-28766 lies in the persistent threat of DLL injection vulnerabilities in widely used applications. This case illustrates the importance of maintaining updated software to mitigate such risks.
Organizations should adopt a proactive stance by implementing regular security audits and staying informed about emerging vulnerabilities. Consider establishing a vulnerability management program to ensure all critical patches are applied promptly.
Additionally, organizations should remain aware of the trends in DLL injection attacks and familiarize themselves with penetration testing methodologies to effectively identify and address similar vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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