CVE-2024-49079 in Windows
Summary
by MITRE • 12/12/2024
Input Method Editor (IME) Remote Code Execution Vulnerability
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 02/20/2025
The Input Method Editor IME remote code execution vulnerability represents a critical security flaw that affects text input processing systems across various operating environments. This class of vulnerability typically resides within the complex architecture of input method frameworks that translate user keystrokes into appropriate character representations, particularly for languages requiring complex character sets such as Chinese, Japanese, and Korean. The vulnerability stems from improper validation and handling of input data within IME components that process text translation and composition operations.
The technical implementation of this flaw often involves buffer overflow conditions or memory corruption issues within IME processing modules that fail to properly validate incoming data streams. Attackers can exploit these weaknesses by crafting malicious input sequences that trigger unintended code execution within the context of the IME process. The vulnerability typically manifests when the system processes specially crafted text inputs through the IME framework, leading to arbitrary code execution capabilities that can be leveraged for privilege escalation or system compromise. These flaws are particularly dangerous because they often execute with elevated privileges and can bypass traditional security controls.
The operational impact of IME remote code execution vulnerabilities extends beyond simple system compromise into comprehensive security breaches affecting user data integrity and confidentiality. Attackers can leverage these vulnerabilities to install persistent backdoors, exfiltrate sensitive information, or establish command and control channels through the compromised input processing infrastructure. The attack surface is particularly broad since IME components are integral to virtually all text input operations across different applications and system levels. This vulnerability type commonly maps to CWE-121 stack-based buffer overflow conditions and can be classified under ATT&CK technique T1059 for execution through command and scripting interpreters.
Mitigation strategies for IME remote code execution vulnerabilities require comprehensive system hardening approaches including regular security updates, input validation enforcement, and privilege separation measures. Organizations should implement robust application whitelisting policies to restrict IME component access and monitor suspicious input processing activities that may indicate exploitation attempts. System administrators must ensure timely patch management for operating system components and third-party applications containing vulnerable IME implementations. The implementation of sandboxing techniques for input processing operations and regular security assessments of text input frameworks can significantly reduce the risk exposure associated with these vulnerabilities.
Additional protective measures include network segmentation to limit lateral movement capabilities, enhanced logging and monitoring of IME activity, and regular security training for personnel regarding potential attack vectors. The vulnerability's exploitation often requires minimal user interaction making it particularly dangerous in environments where automated attacks are possible. Security teams should establish incident response procedures specifically addressing IME-based compromises and maintain detailed forensic capabilities to analyze exploitation attempts. Regular penetration testing focused on input processing components can help identify additional weaknesses in the system architecture that may contribute to successful exploitation of similar vulnerabilities.
The broader implications of IME vulnerabilities extend to supply chain security considerations, as these flaws often affect widely distributed software components that may be present across multiple organizations and systems. Remediation efforts should consider both immediate patch deployment and longer-term architectural improvements to reduce reliance on vulnerable text input processing mechanisms. Organizations must also evaluate their third-party software dependencies for similar vulnerabilities and implement comprehensive vulnerability management programs that include regular assessment of input processing frameworks. The security community continues to monitor emerging threats targeting IME components, with particular attention to zero-day exploits and advanced persistent threat campaigns leveraging these vulnerabilities for initial access or privilege escalation.