CVE-2024-44902 in Thinkphp
Summary
by MITRE • 09/09/2024
A deserialization vulnerability in Thinkphp v6.1.3 to v8.0.4 allows attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 09/20/2024
This vulnerability represents a critical deserialization flaw in the ThinkPHP web application framework affecting versions 6.1.3 through 8.0.4. The issue stems from insufficient input validation during object deserialization processes, creating an avenue for remote code execution attacks. Attackers can exploit this weakness by crafting malicious serialized data that, when processed by the vulnerable application, triggers arbitrary code execution on the target server. The vulnerability operates at the core level of the framework's object handling mechanisms, making it particularly dangerous as it can be leveraged to gain full control over affected systems. This type of vulnerability falls under the category of deserialization attacks that are commonly classified as CWE-502 in the Common Weakness Enumeration catalog, representing a well-known security risk in software development practices. The attack surface is broad as any application utilizing the affected ThinkPHP versions and processing untrusted data through deserialization functions becomes susceptible to exploitation.
The technical implementation of this vulnerability involves the manipulation of serialized PHP objects within the application's data processing pipeline. When the framework attempts to deserialize malicious input, it inadvertently executes code contained within the serialized data structure. This occurs because the application fails to properly validate or sanitize the serialized data before processing it through PHP's unserialize function. The exploitation process typically requires attackers to craft specific payloads that can bypass security measures while maintaining the structural integrity of the serialized objects. The vulnerability is particularly concerning because it can be triggered through various entry points including API endpoints, file upload handlers, or any component that accepts serialized data from external sources. This aligns with ATT&CK technique T1203 which describes the exploitation of deserialization vulnerabilities to execute arbitrary code on target systems.
The operational impact of this vulnerability extends far beyond simple data compromise, as successful exploitation can result in complete system takeover and persistent access for attackers. Organizations running affected ThinkPHP applications face significant risks including data theft, service disruption, and potential lateral movement within their network infrastructure. The vulnerability's severity is compounded by the fact that many web applications rely on ThinkPHP for their core functionality, meaning a single compromised application can serve as a foothold for broader attacks. Attackers can leverage this vulnerability to establish backdoors, exfiltrate sensitive information, or deploy additional malware payloads. The widespread adoption of ThinkPHP across various industries makes this vulnerability particularly dangerous from a threat landscape perspective, as it can affect everything from small business websites to enterprise-level applications. Organizations must consider the potential for cascading effects when a single vulnerable component is exploited, as attackers can use the compromised system as a launching point for further reconnaissance and attack activities.
Mitigation strategies for this vulnerability require immediate action including updating to patched versions of ThinkPHP where available, implementing proper input validation for all deserialization operations, and applying network-level restrictions to limit exposure. Organizations should prioritize patch management processes to ensure all affected systems are updated promptly, as the vulnerability exists in multiple versions of the framework. Additional protective measures include implementing web application firewalls to detect and block malicious deserialization attempts, disabling unnecessary deserialization functionality where possible, and conducting thorough security reviews of application code to identify other potential injection points. Security teams should also implement monitoring solutions specifically designed to detect unusual deserialization patterns or suspicious data processing activities that could indicate exploitation attempts. The remediation process must include comprehensive testing to ensure that patches do not introduce regressions in application functionality while maintaining the security improvements. Organizations should also consider implementing automated vulnerability scanning tools that can identify unpatched systems and provide real-time alerts when potential exploitation attempts are detected, aligning with ATT&CK technique T1592 which emphasizes the importance of identifying and mitigating attack vectors through proactive security measures.