CVE-2022-1762 in iQ Block Country Plugin
Summary
by MITRE • 06/13/2022
The iQ Block Country WordPress plugin through 1.2.13 does not properly checks HTTP headers in order to validate the origin IP address, allowing threat actors to bypass it's block feature by spoofing the headers.
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Analysis
by VulDB Data Team • 06/13/2022
The iQ Block Country WordPress plugin version 1.2.13 and earlier contains a critical security flaw that undermines its core functionality as a geographic access control mechanism. This vulnerability stems from inadequate validation of HTTP headers used to determine client IP addresses, creating a significant bypass opportunity for malicious actors seeking to circumvent geographic restrictions. The plugin's failure to properly authenticate the origin IP address through robust header validation represents a fundamental design weakness that directly compromises the security posture of websites relying on this protection mechanism. Attackers can exploit this vulnerability by spoofing HTTP headers to present false IP addresses that appear to originate from allowed geographic regions, effectively neutralizing the plugin's intended protection.
The technical implementation of this vulnerability aligns with CWE-284, which addresses improper access control through inadequate input validation. The plugin's reliance on HTTP headers such as X-Forwarded-For, X-Real-IP, or similar mechanisms without proper sanitization or verification creates an attack surface where threat actors can manipulate these values to bypass restrictions. This flaw operates at the network layer validation context, where the system assumes header values are trustworthy without implementing proper source verification or cryptographic validation. The vulnerability specifically targets the principle of least privilege and access control enforcement, as the system fails to validate that incoming requests genuinely originate from the claimed geographic locations.
The operational impact of this vulnerability extends beyond simple geographic bypassing, as it fundamentally undermines the integrity of the plugin's security model. Websites using this plugin may experience unauthorized access from malicious actors who can spoof IP addresses to appear as legitimate users from permitted regions. This creates potential for data exfiltration, content manipulation, or other malicious activities that would otherwise be blocked by the geographic restriction system. The vulnerability affects any website utilizing the iQ Block Country plugin for access control, potentially exposing sensitive content or functionality to unauthorized users based on geographic location. Organizations relying on this plugin for compliance with regional access restrictions or for protecting against certain geographic threats face significant risk of security breaches.
Mitigation strategies should focus on implementing proper header validation mechanisms that verify the authenticity of IP address information through multiple verification layers. Security teams should consider implementing cryptographic signature validation for headers, using trusted proxy configurations, or employing more robust IP geolocation services that provide validated location data. Organizations should also implement additional monitoring and logging of access attempts to detect unusual geographic patterns that might indicate header spoofing attempts. The ATT&CK framework categorizes this vulnerability under T1071.004 for application layer protocols and T1566 for credential access through social engineering, as the bypass technique relies on manipulating network protocols to gain unauthorized access. Regular security audits and input validation reviews should be conducted to prevent similar implementation flaws in other network security mechanisms, particularly those relying on header-based authentication or IP validation systems.