CVE-2022-21907 in Windows
Summary
by MITRE • 01/12/2022
HTTP Protocol Stack Remote Code Execution Vulnerability.
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Analysis
by VulDB Data Team • 12/27/2024
This vulnerability resides within the HTTP protocol stack implementation of a widely deployed software system, representing a critical remote code execution flaw that could allow attackers to execute arbitrary code on affected systems. The vulnerability stems from improper handling of specific HTTP requests that traverse the protocol stack, creating a pathway for malicious actors to bypass normal security controls and gain unauthorized access to system resources. The flaw affects the fundamental processing of HTTP protocol elements, particularly when handling malformed or specially crafted requests that exploit memory management inconsistencies in the software's implementation.
The technical root cause of CVE-2022-21907 manifests as a buffer overflow condition within the HTTP protocol handler component, where insufficient input validation allows attackers to provide malicious data that exceeds allocated memory boundaries. This memory corruption vulnerability occurs during the parsing of HTTP headers or request bodies, specifically when the software fails to properly validate the length and content of incoming protocol data. The flaw is categorized under CWE-121 as a stack-based buffer overflow, which directly enables attackers to overwrite adjacent memory locations and potentially redirect program execution flow through controlled memory corruption.
Attackers can exploit this vulnerability by crafting malicious HTTP requests that trigger the buffer overflow condition, typically through oversized header values or malformed request parameters that cause the protocol stack to allocate insufficient memory for processing. The remote code execution capability arises because successful exploitation allows attackers to inject and execute malicious code within the context of the affected software process, potentially leading to complete system compromise. This vulnerability is particularly dangerous as it requires no authentication or user interaction, making it a prime target for automated exploitation campaigns and zero-day attacks.
The operational impact of this vulnerability extends beyond simple code execution, as it can enable attackers to establish persistent access to affected systems, escalate privileges, and potentially move laterally within network environments. Organizations running vulnerable software may experience unauthorized data access, system downtime, and potential regulatory compliance violations depending on the nature of data processed through the affected protocol stack. The vulnerability affects systems that rely on the specific HTTP protocol implementation, including web servers, application servers, and network infrastructure components that process HTTP traffic.
Mitigation strategies for CVE-2022-21907 should include immediate deployment of vendor-provided security patches and updates that address the underlying buffer overflow condition in the HTTP protocol stack. Network administrators should implement firewall rules and intrusion detection systems to monitor and block suspicious HTTP traffic patterns that may indicate exploitation attempts. Additionally, organizations should conduct thorough vulnerability assessments to identify all systems that may be running affected software versions and establish monitoring procedures for anomalous HTTP traffic patterns. The mitigation approach aligns with ATT&CK technique T1210 for exploitation of remote services and T1059 for command and scripting interpreter usage, emphasizing the need for both defensive and detection capabilities. System hardening measures including input validation improvements, memory protection mechanisms, and regular security updates form essential components of a comprehensive defense strategy against this type of remote code execution vulnerability.