CVE-2024-24697 in Desktop Client
Summary
by MITRE • 02/14/2024
Untrusted search path in some Zoom 32 bit Windows clients may allow an authenticated user to conduct an escalation of privilege via local access.
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Analysis
by VulDB Data Team • 10/10/2024
The vulnerability identified as CVE-2024-24697 represents a critical privilege escalation flaw within certain 32-bit Windows implementations of the Zoom client software. This issue stems from improper handling of the application's search path mechanism, which creates an exploitable condition where an authenticated user with local system access can manipulate the execution flow of the application. The vulnerability specifically affects the Windows client versions of Zoom that operate in 32-bit mode, making it particularly concerning for organizations that maintain legacy systems or have not yet migrated to 64-bit architectures. The flaw manifests when the application searches for required libraries or components in directories that are not properly secured or validated, potentially allowing malicious code to be loaded in place of legitimate system components.
The technical implementation of this vulnerability aligns with CWE-428, which describes "Unquoted Search Path," and also relates to CWE-276, "Incorrect Permissions," as it involves improper access controls during the application's execution process. When the Zoom client attempts to resolve library dependencies, it follows a predictable search order that does not adequately validate or secure the directories in which it searches for required components. This behavior creates a window of opportunity for attackers who can place malicious DLL files in directories that are searched before the legitimate system directories. The authenticated user requirement means that the attacker must already have valid credentials to the system, but once inside, they can leverage this flaw to gain elevated privileges that would normally be restricted. The vulnerability is particularly dangerous because it requires minimal privileges to exploit and can result in complete system compromise.
The operational impact of CVE-2024-24697 extends beyond simple privilege escalation, as it provides a potential foothold for more sophisticated attacks within an organization's network infrastructure. Attackers who successfully exploit this vulnerability can execute arbitrary code with elevated privileges, potentially allowing them to install backdoors, modify system files, or access sensitive data that would normally be protected by standard access controls. This type of local privilege escalation attack can be particularly devastating in enterprise environments where Zoom clients are widely deployed across multiple systems. The vulnerability creates a persistent threat vector that can be leveraged for lateral movement within the network, as the attacker gains access to system-level capabilities that can be used to compromise additional systems or escalate their access further. Organizations that rely heavily on Zoom for video conferencing and collaboration may find their security posture significantly weakened by this flaw.
Security mitigations for CVE-2024-24697 should focus on immediate remediation through official software updates provided by Zoom, which typically address the underlying search path implementation issues. System administrators should implement the principle of least privilege by restricting local user access to critical system directories and ensuring that only authorized personnel have the ability to modify system components. The ATT&CK framework categorizes this vulnerability under T1068, "Exploitation for Privilege Escalation," and T1548.002, "Abuse of Cloud Admin APIs," which highlights the importance of monitoring for suspicious privilege escalation activities. Additional defensive measures include implementing application whitelisting policies, using Windows Defender Application Control or similar technologies to restrict which executables can run on the system, and conducting regular security audits of system directories to ensure no unauthorized modifications have occurred. Organizations should also consider deploying endpoint detection and response solutions that can monitor for suspicious file creation or modification patterns in system directories that are commonly targeted by this type of exploit.