CVE-2024-40433 in WeChat
Summary
by MITRE • 07/27/2024
Insecure Permissions vulnerability in Tencent wechat v.8.0.37 allows an attacker to escalate privileges via the web-view component.
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Analysis
by VulDB Data Team • 07/30/2024
The vulnerability CVE-2024-40433 represents a critical insecure permissions flaw within Tencent WeChat version 8.0.37 that specifically targets the web-view component architecture. This issue stems from inadequate access control mechanisms that permit unauthorized privilege escalation through the mobile application's web rendering interface. The web-view component serves as a bridge between native application functionality and web-based content, making it a prime target for exploitation. Attackers can leverage this vulnerability to gain elevated system privileges that should normally be restricted to authorized processes only, effectively bypassing the application's security model.
The technical implementation of this vulnerability manifests through improper permission validation within the web-view subsystem where the application fails to properly enforce security boundaries between different privilege levels. This flaw allows malicious actors to manipulate the web-view component to execute code with higher privileges than initially intended, potentially enabling full system compromise. The vulnerability specifically affects the application's ability to maintain proper access controls when rendering web content, creating an attack surface that can be exploited through carefully crafted web-based payloads. According to CWE classification, this corresponds to CWE-276 which deals with insecure permissions and improper access control mechanisms.
The operational impact of CVE-2024-40433 extends beyond simple privilege escalation to encompass potential full system compromise and data exfiltration capabilities. An attacker who successfully exploits this vulnerability can access sensitive user data, manipulate application functionality, and potentially establish persistent backdoors within the device. The web-view component's integration with native system APIs creates a dangerous attack vector where web-based exploits can translate into system-level privileges. This vulnerability particularly affects enterprise environments where WeChat is commonly used for business communications, as it could enable attackers to access corporate data through compromised employee devices. The ATT&CK framework categorizes this under privilege escalation techniques with T1068 specifically addressing local privilege escalation through application flaws.
Mitigation strategies for CVE-2024-40433 should prioritize immediate application updates from Tencent to address the insecure permissions implementation. Organizations should implement network-level monitoring to detect unusual web-view activity and privilege escalation attempts. Security teams should conduct comprehensive vulnerability assessments of all WeChat-related applications and their web-view components to identify similar permission flaws. The remediation process requires proper access control implementation that enforces strict privilege boundaries within the web-view subsystem and regular security audits of mobile application components. Additionally, users should be educated about the risks associated with untrusted web content and the importance of keeping applications updated to prevent exploitation of such vulnerabilities that could lead to comprehensive device compromise and unauthorized data access.