CVE-2022-45809 in Thumbs Rating Plugin
Summary
by MITRE • 12/19/2023
Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in Ricard Torres Thumbs Rating.This issue affects Thumbs Rating: from n/a through 5.0.0.
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Analysis
by VulDB Data Team • 12/19/2023
The Time-of-check Time-of-use race condition vulnerability in Ricard Torres Thumbs Rating represents a critical security flaw that exploits the temporal gap between when a system verifies access permissions and when it actually performs the requested operation. This vulnerability exists within the plugin version range from n/a through 5.0.0, creating a window of opportunity for malicious actors to manipulate system states between verification and execution phases. The flaw occurs when the system performs a permission check on a resource and subsequently uses that same resource without revalidating the access rights, allowing attackers to potentially modify or replace the target resource during the intervening period.
This specific vulnerability falls under the CWE-367 category of Time-of-Check to Time-of-Use race condition, which is classified as a fundamental design flaw in concurrent system operations. The ATT&CK framework categorizes this as a privilege escalation technique where adversaries exploit temporal inconsistencies in access control mechanisms. The vulnerability manifests when the plugin performs file operations or resource access checks without proper synchronization mechanisms, enabling attackers to substitute files or resources between the time of permission verification and the actual execution of the operation.
The operational impact of this vulnerability extends beyond simple access control bypasses, as it can enable arbitrary code execution, data manipulation, or privilege escalation within the affected WordPress environment. Attackers could potentially replace critical files with malicious counterparts, modify plugin configurations, or gain elevated privileges through carefully orchestrated timing attacks. The vulnerability is particularly dangerous in multi-user environments where different permission levels exist, as it could allow low-privilege users to perform actions that should be restricted to administrators or higher-privileged accounts.
Mitigation strategies for this TOCTOU vulnerability require implementing proper synchronization mechanisms and atomic operations throughout the plugin's codebase. The recommended approach involves using file locking mechanisms, atomic file operations, or revalidation checks that occur immediately before resource usage rather than after permission verification. Security patches should enforce immediate access validation at the point of resource utilization, eliminating the temporal gap that enables exploitation. Additionally, implementing proper input sanitization, access control lists, and secure coding practices such as those recommended by the OWASP Top Ten can significantly reduce the attack surface. System administrators should also consider implementing monitoring solutions to detect anomalous file access patterns and ensure all WordPress installations remain updated with the latest security patches addressing this specific race condition vulnerability.