CVE-2024-5732 in Clash
Summary
by MITRE • 06/07/2024
A vulnerability was found in Clash up to 0.20.1 on Windows. It has been declared as critical. This vulnerability affects unknown code of the component Proxy Port. The manipulation leads to improper authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. It is recommended to change the configuration settings. VDB-267406 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 06/08/2024
The vulnerability identified as CVE-2024-5732 represents a critical security flaw in Clash versions 0.20.1 and earlier on Windows operating systems. This vulnerability specifically targets the Proxy Port component within the Clash framework, which serves as a core element for managing network traffic routing and proxy configurations. The flaw manifests as improper authentication mechanisms that fail to adequately verify user credentials or authorization levels when establishing proxy connections. The vulnerability's classification as critical stems from its potential to allow unauthorized access to network resources and the fact that it has been publicly disclosed with available exploit code, making it immediately actionable by threat actors. The attack vector is remote, meaning that malicious actors can exploit this vulnerability without requiring physical access to the target system, which significantly broadens the potential attack surface.
The technical implementation of this vulnerability involves weaknesses in how Clash handles authentication protocols when processing proxy port connections. When users configure proxy settings through the Clash application on Windows systems, the authentication checks fail to properly validate incoming connection requests or user credentials. This authentication bypass allows attackers to establish unauthorized proxy connections, potentially enabling them to route network traffic through compromised systems, intercept communications, or gain access to restricted network resources. The vulnerability's impact extends beyond simple credential theft as it can enable more sophisticated attacks such as man-in-the-middle operations or lateral movement within network environments. The flaw particularly affects Windows deployments where Clash is used as a proxy management tool, making it a significant concern for organizations relying on this software for network traffic control and security policy enforcement.
The operational implications of CVE-2024-5732 are severe for any organization using Clash on Windows platforms, particularly those with complex network infrastructures or sensitive data environments. Attackers exploiting this vulnerability could potentially compromise entire network segments by establishing unauthorized proxy connections that bypass normal security controls. The vulnerability's remote exploitability means that attackers can target systems from outside the network perimeter, making traditional network security measures less effective against this specific threat. Organizations may face regulatory compliance issues if this vulnerability allows unauthorized access to protected data or if it enables attackers to establish persistent access points within their network infrastructure. The public disclosure of exploit code increases the likelihood of widespread exploitation, as threat actors can readily implement automated attack scripts against vulnerable systems.
Mitigation strategies for CVE-2024-5732 should prioritize immediate action to address the authentication flaw in Clash proxy configurations. Organizations should upgrade to Clash versions 0.20.2 or later where this vulnerability has been patched, as this represents the most effective long-term solution. System administrators should review and strengthen proxy configuration settings to implement additional authentication layers beyond what the vulnerable software provides. The implementation of network monitoring tools to detect unusual proxy connection patterns can help identify potential exploitation attempts. Security teams should also consider implementing network segmentation strategies that limit the impact of compromised proxy configurations and establish stricter access controls for proxy management interfaces. According to CWE guidelines, this vulnerability relates to improper authentication mechanisms, specifically CWE-287 which addresses authentication failures in software components. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and lateral movement through proxy configurations, potentially enabling T1021.001 for remote services and T1071.001 for application layer protocol usage. Organizations should also conduct thorough vulnerability assessments to identify other instances of Clash or similar proxy software that may be susceptible to similar authentication flaws.