CVE-2024-41564 in EMI
Summary
by MITRE • 08/28/2024
EMI v.1.1.10 and before, fixed in v.1.1.11, contains an Improper Validation of Specified Index, Position, or Offset in Input vulnerability. The specific issue is a failure to validate slot index and decrement stack count in EMI mod for Minecraft, which allows in-game item duplication.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability identified as CVE-2024-41564 affects EMI mod version 1.1.10 and earlier, representing a critical flaw in the mod's input validation mechanisms that enables unauthorized item duplication within Minecraft gameplay. This vulnerability exists within the EMI mod's handling of slot indices and stack count management, specifically failing to properly validate user-provided indices during inventory operations. The issue manifests as an improper validation of specified index, position, or offset in input, which directly relates to CWE-129, a well-documented weakness in software that fails to validate input data before processing. The vulnerability is particularly concerning because it allows players to exploit the mod's inventory management system to create unlimited copies of items, fundamentally breaking the game's economic and resource management systems.
The technical implementation of this vulnerability stems from the mod's insufficient validation of slot indices when decrementing stack counts during inventory operations. When a player interacts with the mod's interface to manipulate item stacks, the system fails to verify that the specified slot index falls within acceptable bounds before performing decrement operations. This validation failure creates a condition where malicious users can specify invalid slot indices that point to memory locations outside the intended inventory structure. The improper validation allows attackers to manipulate the stack count decrement logic in ways that bypass normal inventory constraints, enabling them to duplicate items by exploiting the lack of proper input sanitization. This flaw operates at the intersection of CWE-129 and CWE-755, combining improper input validation with failure to handle exceptional conditions properly.
The operational impact of CVE-2024-41564 extends beyond simple item duplication, fundamentally compromising the integrity of Minecraft's gameplay economy and resource management systems. Players who exploit this vulnerability can generate infinite quantities of rare or valuable items, which directly undermines the game's balance and creates unfair advantages in multiplayer environments. The vulnerability affects all users running EMI mod version 1.1.10 or earlier, making it particularly dangerous in public or shared servers where multiple players can exploit the flaw simultaneously. This issue also represents a significant concern for mod developers and server administrators who must consider the security implications of third-party modifications. The vulnerability's exploitation requires minimal technical knowledge, making it accessible to average players who might not understand the underlying security implications.
Mitigation strategies for CVE-2024-41564 primarily involve upgrading to EMI mod version 1.1.11, which includes proper input validation for slot indices and stack count operations. System administrators should implement immediate patch management procedures to ensure all affected installations are updated promptly. The fix addresses the root cause by implementing comprehensive validation checks that verify slot indices against valid inventory boundaries before any decrement operations are performed. Additional protective measures include monitoring for unusual inventory manipulation patterns and implementing server-side validation that can detect and prevent exploitation attempts. Organizations should also consider implementing the principle of least privilege for mod installations and regularly auditing third-party software for security vulnerabilities. This vulnerability highlights the importance of input validation in game development and demonstrates how seemingly minor validation failures can create significant security issues in interactive applications. The remediation process should include thorough regression testing to ensure that the fix does not introduce new functionality issues while maintaining the mod's intended user experience.