CVE-2024-3050 in Site Reviews Plugin
Summary
by MITRE • 05/29/2024
The Site Reviews WordPress plugin before 7.0.0 retrieves client IP addresses from potentially untrusted headers, allowing an attacker to manipulate its value. This may be used to bypass IP-based blocking
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Analysis
by VulDB Data Team • 05/29/2024
The Site Reviews WordPress plugin vulnerability identified as CVE-2024-3050 represents a critical security flaw in version 7.0.0 and earlier, where the plugin fails to properly validate and sanitize client IP address information obtained from HTTP headers. This issue stems from the plugin's reliance on potentially untrusted sources for determining visitor IP addresses, creating a vector for IP address spoofing attacks that can circumvent security controls designed to restrict access based on IP addresses. The vulnerability is particularly concerning within WordPress ecosystems where IP-based access controls are commonly implemented for security purposes, including rate limiting, comment moderation, and access restriction mechanisms.
The technical implementation of this flaw involves the plugin's improper handling of HTTP headers such as X-Forwarded-For, X-Real-IP, or Client-IP, which are frequently used by web servers and reverse proxies to communicate the original client IP address to backend applications. When these headers are directly consumed without proper validation, attackers can manipulate their values to appear as if they originate from different IP addresses, effectively bypassing IP-based access controls. This behavior aligns with CWE-20: Improper Input Validation, which specifically addresses vulnerabilities arising from insufficient validation of input data that can be manipulated by attackers. The vulnerability creates a pathway for malicious actors to circumvent security measures that depend on accurate IP address identification, potentially allowing unauthorized access to restricted content or services.
The operational impact of this vulnerability extends beyond simple IP address manipulation, as it can be leveraged in various attack scenarios that compromise the integrity of IP-based security controls. Attackers may exploit this weakness to bypass rate limiting mechanisms that protect against automated attacks, circumvent comment spam filtering systems, or gain unauthorized access to restricted areas of a website that are protected by IP address restrictions. The vulnerability is particularly dangerous in environments where the plugin is used for user authentication, access control, or logging activities, as it can allow attackers to mask their true IP addresses and potentially evade detection by security monitoring systems. This issue directly impacts the principle of least privilege and can undermine the effectiveness of network security controls that rely on IP address validation.
Security mitigations for this vulnerability require immediate patching to version 7.0.0 or later, which should implement proper IP address validation and sanitization techniques. Organizations should ensure that the plugin is updated through official channels and verify the integrity of the update process. Additional defensive measures include implementing proper input validation for HTTP headers, using trusted IP address sources, and configuring web servers to properly handle and sanitize forwarded IP information. The vulnerability highlights the importance of following secure coding practices as outlined in the OWASP Top Ten, specifically addressing the risk of insecure input handling and the need for proper validation of all external inputs. Network administrators should also consider implementing additional monitoring and logging mechanisms to detect potential exploitation attempts and ensure that IP-based security controls are properly enforced through proper header validation and sanitization procedures.