CVE-2024-38177 in Windows App Installer
Summary
by MITRE • 08/13/2024
Windows App Installer Spoofing Vulnerability
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Analysis
by VulDB Data Team • 07/05/2026
The Windows App Installer spoofing vulnerability represents a critical security flaw in the Windows Package Manager ecosystem that allows attackers to manipulate package installation processes through deceptive means. This vulnerability specifically affects the Windows App Installer component which handles the installation and management of applications from various sources including the Microsoft Store and third-party repositories. The flaw stems from insufficient validation mechanisms within the installer's user interface and package handling routines, creating opportunities for malicious actors to present fraudulent package information to unsuspecting users.
The technical implementation of this vulnerability exploits the trust model inherent in Windows App Installer by manipulating the display of application metadata during installation processes. Attackers can craft specially formatted package manifests or manipulate network communications to alter how application names, publishers, descriptions, and icons appear to end users. This spoofing capability operates at multiple levels including the graphical user interface presentation layer, package manifest parsing, and network communication protocols used by the installer service. The vulnerability specifically impacts the way the system validates and displays package information, allowing attackers to masquerade malicious applications as legitimate ones from trusted publishers.
Operationally this vulnerability creates significant risks for enterprise and individual users alike, as it enables sophisticated social engineering campaigns where attackers can make malicious software appear trustworthy. The impact extends beyond simple deception to potentially enable credential theft, system compromise, or data exfiltration when users unknowingly install malicious packages that appear legitimate. Security researchers have identified that the vulnerability affects Windows 10 and Windows 11 systems running the latest versions of the Windows App Installer service, with particular risk in environments where users frequently install applications from third-party sources without proper verification processes.
The mitigation strategies for this vulnerability require a multi-layered approach combining system updates, user education, and administrative controls. Microsoft has released security patches that strengthen package validation mechanisms and improve the cryptographic verification of package metadata. Organizations should implement strict application whitelisting policies and ensure regular Windows updates are applied to all systems. Users must be educated about verifying package sources and examining installation prompts carefully before proceeding with installations. The vulnerability aligns with CWE-345 Insufficient Verification of Data Authenticity, which addresses weaknesses in authentication and verification mechanisms, and maps to ATT&CK technique T1068 Exploitation for Privilege Escalation through deceptive software installation processes that can lead to elevated system access.
Additional protective measures include enabling Windows Defender Application Control policies, configuring secure group policy settings for package management, and implementing network monitoring to detect unusual package installation patterns. System administrators should regularly audit installed applications and monitor for unauthorized package installations that may indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining robust software supply chain security practices and highlights the need for continuous verification of application integrity throughout the system lifecycle. Organizations must also consider implementing endpoint detection and response solutions that can identify suspicious installation behaviors and alert security teams to potential exploitation attempts.