CVE-2025-47737 in trailer Crate
Summary
by MITRE • 05/09/2025
lib.rs in the trailer crate through 0.1.2 for Rust mishandles allocating with a size of zero.
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Analysis
by VulDB Data Team • 01/31/2026
The vulnerability identified as CVE-2025-47737 resides within the trailer crate version 0.1.2 and earlier of the rust programming language ecosystem. This issue manifests in the lib.rs component where the crate fails to properly handle memory allocation requests with a size of zero. The trailer crate is designed to provide functionality for handling file trailers and metadata, but its memory management implementation contains a critical flaw that can lead to system instability and potential security implications.
The technical flaw represents a memory allocation error where the crate's implementation does not adequately validate or handle cases where zero-sized allocations are requested. This type of vulnerability falls under the category of improper handling of edge cases in memory management, which can manifest as undefined behavior or memory corruption when the application attempts to allocate memory with zero size. The issue stems from the crate's failure to implement proper bounds checking or size validation before proceeding with allocation operations, creating a potential vector for memory-related exploits.
The operational impact of this vulnerability extends beyond simple memory management issues and can potentially lead to application crashes, memory corruption, or in severe cases, arbitrary code execution. When applications utilizing the trailer crate process data that triggers zero-sized allocations, the system may experience unpredictable behavior that could be exploited by malicious actors. The vulnerability affects any application that depends on this crate and processes input that could result in zero-sized allocation requests, making it particularly concerning for systems handling untrusted input or data streams.
Security implications of CVE-2025-47737 align with CWE-459, which addresses incomplete cleanup issues in memory management, and may also relate to CWE-754, concerning improper check for unusual or exceptional conditions. The vulnerability could potentially be leveraged by attackers to perform memory corruption attacks or to cause denial of service conditions, particularly in applications that process external data or user input. Organizations using the trailer crate in their rust applications should consider the potential for exploitation, especially in environments where memory safety is paramount.
Mitigation strategies for this vulnerability include immediate upgrading to a patched version of the trailer crate if available, implementing additional input validation to prevent zero-sized allocation requests, and conducting thorough code reviews to identify other potential memory management issues within the application stack. System administrators should also consider monitoring for unusual memory allocation patterns that could indicate exploitation attempts. The recommended approach involves updating to the latest version of the crate that addresses this specific memory allocation handling issue, while also implementing defensive programming practices to prevent similar vulnerabilities in other components of the software ecosystem.